http://aplawrence.com/ Linux feed at aplawrence.com: Thousands of articles, reviews, consultants listings, skills tests, opinion, how-to's for Unix, Linux and Mac OS X, networking, web site maintenance and more.. hourly 6 2008-01-01T00:00+00:00 en A.P. Lawrence Copyright A.P. Lawrence A.P. Lawrence (mailto:rssfeeds@aplawrence.com) 2009-11-09T14:56:12+00:00 41.889582-70.894066 http://aplawrence.com/image21.gif http://aplawrence.com Linux,MacOSX,Shell,Perl ; 2009/11/09<br /> <!-- LEFTADOK --> <!-- PCOUNT --> <!-- PCOUNT --> <p>At any Linux/Unix forum a large number of posts have to do with sed and awk - how do I do this, how do I do that?</p> <p>I can see using sed. It's quick, it's simple (unless we are doing something complicated) and easy to learn. On the other hand, we have "awk", which is nasty and error prone even in its most basic invocations.</p> <p><a href="http://aplawrence.com/rss/index.html">Full Text RSS Feed now available</a></p> <p>Comments: <a href="http://aplawrence.com/cgi-bin/newcomm.pl?commenting=/Unixart/awk-vs.perl.html">Click Here.</a></p> <p><br /><br /><i><b>Many of the products and books I review are things I purchased for my own use. Some were given to me specifically for the purpose of reviewing them.</b></i></p> <p><i><b>I resell or can earn commissions from the sale of some of these items. Links within these pages may be affiliate links that pay me for referring you to them. That's mostly insignificant amounts of money; whenever it is not I have made my relationship plain. If you have any question, please do feel free to contact me.</b></i></p> <div style="font-size:80%"> <table> <tr> <td> - </td> <td><a href="http://aplawrence.com/Tests">Skills Tests</a></td> <td> - </td> <td><a href="http://aplawrence.com/psst.html">Psst - wanna work for yourself?</a></td> <td> - </td> <td><a href="http://aplawrence.com/troubleshootingbook.html">Unix/Linux Troubleshooting e-book</a></td> <td> - </td> <td><a href="http://aplawrence.com/Kerio">Kerio Mail Server</a></td> <td> - </td> <td><a href="http://aplawrence.com/rates.html">Consulting</a></td> <td> - </td> <td><a href="http://aplawrence.com/advert.html">Advertise Here</a></td> </tr> </table> </div> <p><a href="http://feedads.g.doubleclick.net/~a/T8OPUqaD-n7hFEm0sGLd3Y2TLkc/0/da"><img src="http://feedads.g.doubleclick.net/~a/T8OPUqaD-n7hFEm0sGLd3Y2TLkc/0/di" border="0" ismap="true"></img></a><br/> <a href="http://feedads.g.doubleclick.net/~a/T8OPUqaD-n7hFEm0sGLd3Y2TLkc/1/da"><img src="http://feedads.g.doubleclick.net/~a/T8OPUqaD-n7hFEm0sGLd3Y2TLkc/1/di" border="0" ismap="true"></img></a></p><div class="feedflare"> <a href="http://feeds.feedburner.com/~ff/aplawrence/QIhG?a=XE9yGKQqdzI:dCl3iodBip4:yIl2AUoC8zA"><img src="http://feeds.feedburner.com/~ff/aplawrence/QIhG?d=yIl2AUoC8zA" border="0"></img></a> </div><img src="http://feeds.feedburner.com/~r/aplawrence/QIhG/~4/XE9yGKQqdzI" height="1" width="1"/> http://feedproxy.google.com/~r/aplawrence/QIhG/~3/XE9yGKQqdzI/awk-vs.perl.html http://aplawrence.com/Unixart/awk-vs.perl.html Linux,MacOSX,Shell,Basics ; 2009/11/08<br /> <!-- LEFTADOK --> <!-- PCOUNT --> <!-- PCOUNT --> <p>Let's jazz up some Bash scripts today, shall we?</p> <p>This post was prompted by a forum posting at another site where someone had a script that echoed "Pass' or "Fail" and he wanted "Pass" in green and "Fail" in Red.</p> <p><a href="http://aplawrence.com/rss/index.html">Full Text RSS Feed now available</a></p> <p>Comments: <a href="http://aplawrence.com/cgi-bin/newcomm.pl?commenting=/Linux/setting-colors.html">Click Here.</a></p> <p><br /><br /><i><b>Many of the products and books I review are things I purchased for my own use. Some were given to me specifically for the purpose of reviewing them.</b></i></p> <p><i><b>I resell or can earn commissions from the sale of some of these items. Links within these pages may be affiliate links that pay me for referring you to them. That's mostly insignificant amounts of money; whenever it is not I have made my relationship plain. If you have any question, please do feel free to contact me.</b></i></p> <div style="font-size:80%"> <table> <tr> <td> - </td> <td><a href="http://aplawrence.com/Tests">Skills Tests</a></td> <td> - </td> <td><a href="http://aplawrence.com/psst.html">Psst - wanna work for yourself?</a></td> <td> - </td> <td><a href="http://aplawrence.com/troubleshootingbook.html">Unix/Linux Troubleshooting e-book</a></td> <td> - </td> <td><a href="http://aplawrence.com/Kerio">Kerio Mail Server</a></td> <td> - </td> <td><a href="http://aplawrence.com/rates.html">Consulting</a></td> <td> - </td> <td><a href="http://aplawrence.com/advert.html">Advertise Here</a></td> </tr> </table> </div> <p><a href="http://feedads.g.doubleclick.net/~a/aA6H4aQ6SXhuN0ETDRxYC2tTJ0I/0/da"><img src="http://feedads.g.doubleclick.net/~a/aA6H4aQ6SXhuN0ETDRxYC2tTJ0I/0/di" border="0" ismap="true"></img></a><br/> <a href="http://feedads.g.doubleclick.net/~a/aA6H4aQ6SXhuN0ETDRxYC2tTJ0I/1/da"><img src="http://feedads.g.doubleclick.net/~a/aA6H4aQ6SXhuN0ETDRxYC2tTJ0I/1/di" border="0" ismap="true"></img></a></p><div class="feedflare"> <a href="http://feeds.feedburner.com/~ff/aplawrence/QIhG?a=It8Mx8C7CFU:ShUNVty76Vk:yIl2AUoC8zA"><img src="http://feeds.feedburner.com/~ff/aplawrence/QIhG?d=yIl2AUoC8zA" border="0"></img></a> </div><img src="http://feeds.feedburner.com/~r/aplawrence/QIhG/~4/It8Mx8C7CFU" height="1" width="1"/> http://feedproxy.google.com/~r/aplawrence/QIhG/~3/It8Mx8C7CFU/setting-colors.html http://aplawrence.com/Linux/setting-colors.html Linux,Security ; 2009/11/05<br /> <!-- LEFTADOK --> <!-- PCOUNT --> <!-- PCOUNT --> <p>A customer reported that a Linux machine used for ssh access (to in turn give telnet access to an ancient SCO machine) was refusing logins. I asked him to try logging in as root at the console; he was unable to do so.</p> <p>When I arrived on site, I found that I could not login as he had said. I rebooted to single use mode and started peeking around. The machine had been hacked; there was little doubt about that. It's HOW it was hacked that bothers me,</p> <p><a href="http://aplawrence.com/rss/index.html">Full Text RSS Feed now available</a></p> <p>Comments: <a href="http://aplawrence.com/cgi-bin/newcomm.pl?commenting=/Linux/strange-hack.html">Click Here.</a></p> <p><br /><br /><i><b>Many of the products and books I review are things I purchased for my own use. Some were given to me specifically for the purpose of reviewing them.</b></i></p> <p><i><b>I resell or can earn commissions from the sale of some of these items. Links within these pages may be affiliate links that pay me for referring you to them. That's mostly insignificant amounts of money; whenever it is not I have made my relationship plain. If you have any question, please do feel free to contact me.</b></i></p> <div style="font-size:80%"> <table> <tr> <td> - </td> <td><a href="http://aplawrence.com/Tests">Skills Tests</a></td> <td> - </td> <td><a href="http://aplawrence.com/psst.html">Psst - wanna work for yourself?</a></td> <td> - </td> <td><a href="http://aplawrence.com/troubleshootingbook.html">Unix/Linux Troubleshooting e-book</a></td> <td> - </td> <td><a href="http://aplawrence.com/Kerio">Kerio Mail Server</a></td> <td> - </td> <td><a href="http://aplawrence.com/rates.html">Consulting</a></td> <td> - </td> <td><a href="http://aplawrence.com/advert.html">Advertise Here</a></td> </tr> </table> </div> <p><a href="http://feedads.g.doubleclick.net/~a/JRLZYLD4Qf_278I8kaGofyK6Zm8/0/da"><img src="http://feedads.g.doubleclick.net/~a/JRLZYLD4Qf_278I8kaGofyK6Zm8/0/di" border="0" ismap="true"></img></a><br/> <a href="http://feedads.g.doubleclick.net/~a/JRLZYLD4Qf_278I8kaGofyK6Zm8/1/da"><img src="http://feedads.g.doubleclick.net/~a/JRLZYLD4Qf_278I8kaGofyK6Zm8/1/di" border="0" ismap="true"></img></a></p><div class="feedflare"> <a href="http://feeds.feedburner.com/~ff/aplawrence/QIhG?a=EZioqq6dzr8:NSj8wafuIqU:yIl2AUoC8zA"><img src="http://feeds.feedburner.com/~ff/aplawrence/QIhG?d=yIl2AUoC8zA" border="0"></img></a> </div><img src="http://feeds.feedburner.com/~r/aplawrence/QIhG/~4/EZioqq6dzr8" height="1" width="1"/> http://feedproxy.google.com/~r/aplawrence/QIhG/~3/EZioqq6dzr8/strange-hack.html http://aplawrence.com/Linux/strange-hack.html Troubleshooting,Linux,Samba ; 2009/11/04<br /> <!-- LEFTADOK --> <!-- PCOUNT --> <!-- PCOUNT --> <p>Yesterday a customer called because he needed to be able to write into a certain share on his Samba server. I ssh'd right in, made the change to the config file, restarted Samba and shot him off an "All set!" email.</p> <p>Such confidence had I that immediately after hitting send, I left my house to do some errands and when I realized I had forgotten my phone, I didn't even bother to go back for it: everything is under control, all pigs are fed and ready to fly.</p> <p><a href="http://aplawrence.com/rss/index.html">Full Text RSS Feed now available</a></p> <p>Comments: <a href="http://aplawrence.com/cgi-bin/newcomm.pl?commenting=/Linux/samba-pigs.html">Click Here.</a></p> <p><br /><br /><i><b>Many of the products and books I review are things I purchased for my own use. Some were given to me specifically for the purpose of reviewing them.</b></i></p> <p><i><b>I resell or can earn commissions from the sale of some of these items. Links within these pages may be affiliate links that pay me for referring you to them. That's mostly insignificant amounts of money; whenever it is not I have made my relationship plain. If you have any question, please do feel free to contact me.</b></i></p> <div style="font-size:80%"> <table> <tr> <td> - </td> <td><a href="http://aplawrence.com/Tests">Skills Tests</a></td> <td> - </td> <td><a href="http://aplawrence.com/psst.html">Psst - wanna work for yourself?</a></td> <td> - </td> <td><a href="http://aplawrence.com/troubleshootingbook.html">Unix/Linux Troubleshooting e-book</a></td> <td> - </td> <td><a href="http://aplawrence.com/Kerio">Kerio Mail Server</a></td> <td> - </td> <td><a href="http://aplawrence.com/rates.html">Consulting</a></td> <td> - </td> <td><a href="http://aplawrence.com/advert.html">Advertise Here</a></td> </tr> </table> </div> <p><a href="http://feedads.g.doubleclick.net/~a/sJqpxnjJRTL1MZBoZFZOZBbBURE/0/da"><img src="http://feedads.g.doubleclick.net/~a/sJqpxnjJRTL1MZBoZFZOZBbBURE/0/di" border="0" ismap="true"></img></a><br/> <a href="http://feedads.g.doubleclick.net/~a/sJqpxnjJRTL1MZBoZFZOZBbBURE/1/da"><img src="http://feedads.g.doubleclick.net/~a/sJqpxnjJRTL1MZBoZFZOZBbBURE/1/di" border="0" ismap="true"></img></a></p><div class="feedflare"> <a href="http://feeds.feedburner.com/~ff/aplawrence/QIhG?a=Pb3iTlbbvNU:mNEL1wB9zHI:yIl2AUoC8zA"><img src="http://feeds.feedburner.com/~ff/aplawrence/QIhG?d=yIl2AUoC8zA" border="0"></img></a> </div><img src="http://feeds.feedburner.com/~r/aplawrence/QIhG/~4/Pb3iTlbbvNU" height="1" width="1"/> http://feedproxy.google.com/~r/aplawrence/QIhG/~3/Pb3iTlbbvNU/samba-pigs.html http://aplawrence.com/Linux/samba-pigs.html Linux,MacOSX ; 2009/10/28<br /> <!-- LEFTADOK --> <!-- PCOUNT --> <!-- PCOUNT --> <p>I admit that I have done a "chmod 777" when I should not have. Almost always that came from haste or frustration. Not frustration with Unix permissions, but frustration with whoever had daily care responsibility for the system - their inability to understand permissions might have driven me to this.</p> <p>Sometimes it hardly matters. At many small businesses, everybody has "got root" anyway and has learned that this magic incantation will "fix" problems. Well, until it breaks a setuid program, of course. Nobody, NOBODY ever learns "chmod +w", do they?</p> <p><a href="http://aplawrence.com/rss/index.html">Full Text RSS Feed now available</a></p> <p>Comments: <a href="http://aplawrence.com/cgi-bin/newcomm.pl?commenting=/Unixart/chmod-777.html">Click Here.</a></p> <p><br /><br /><i><b>Many of the products and books I review are things I purchased for my own use. Some were given to me specifically for the purpose of reviewing them.</b></i></p> <p><i><b>I resell or can earn commissions from the sale of some of these items. Links within these pages may be affiliate links that pay me for referring you to them. That's mostly insignificant amounts of money; whenever it is not I have made my relationship plain. If you have any question, please do feel free to contact me.</b></i></p> <div style="font-size:80%"> <table> <tr> <td> - </td> <td><a href="http://aplawrence.com/Tests">Skills Tests</a></td> <td> - </td> <td><a href="http://aplawrence.com/psst.html">Psst - wanna work for yourself?</a></td> <td> - </td> <td><a href="http://aplawrence.com/troubleshootingbook.html">Unix/Linux Troubleshooting e-book</a></td> <td> - </td> <td><a href="http://aplawrence.com/Kerio">Kerio Mail Server</a></td> <td> - </td> <td><a href="http://aplawrence.com/rates.html">Consulting</a></td> <td> - </td> <td><a href="http://aplawrence.com/advert.html">Advertise Here</a></td> </tr> </table> </div> <p><a href="http://feedads.g.doubleclick.net/~a/zd-jDubsAzbMqCcaoWisHExQ91c/0/da"><img src="http://feedads.g.doubleclick.net/~a/zd-jDubsAzbMqCcaoWisHExQ91c/0/di" border="0" ismap="true"></img></a><br/> <a href="http://feedads.g.doubleclick.net/~a/zd-jDubsAzbMqCcaoWisHExQ91c/1/da"><img src="http://feedads.g.doubleclick.net/~a/zd-jDubsAzbMqCcaoWisHExQ91c/1/di" border="0" ismap="true"></img></a></p><div class="feedflare"> <a href="http://feeds.feedburner.com/~ff/aplawrence/QIhG?a=fEdxziwFP_U:rapOO1S_clA:yIl2AUoC8zA"><img src="http://feeds.feedburner.com/~ff/aplawrence/QIhG?d=yIl2AUoC8zA" border="0"></img></a> </div><img src="http://feeds.feedburner.com/~r/aplawrence/QIhG/~4/fEdxziwFP_U" height="1" width="1"/> http://feedproxy.google.com/~r/aplawrence/QIhG/~3/fEdxziwFP_U/chmod-777.html http://aplawrence.com/Unixart/chmod-777.html Linux,MacOSX,Shell ; 2009/10/27<br /> <!-- LEFTADOK --> <!-- PCOUNT --> <!-- PCOUNT --> <p>You need to let users create files in a common directory, but you don't want them to be able to delete other's files. Or you've put certain files, directories or symlinks into a user's home directory and don't want them to be able to mess with any of those. What can you do?</p> <h2>"t" bit</h2> <p>If you create /foo and do "chmod 1777 /foo", you'll have a world-writeable directory with the "text bit" set. Any user can create files here, but they can only delete files that they own (root can still rm anything). That's ownership as listed in the "owner" column of an "ls -l". Group ownership doesn't come into play here although it does change responses a bit.</p> <p><a href="http://aplawrence.com/rss/index.html">Full Text RSS Feed now available</a></p> <p>Comments: <a href="http://aplawrence.com/cgi-bin/newcomm.pl?commenting=/Unixart/file-removal.html">Click Here.</a></p> <p><br /><br /><i><b>Many of the products and books I review are things I purchased for my own use. Some were given to me specifically for the purpose of reviewing them.</b></i></p> <p><i><b>I resell or can earn commissions from the sale of some of these items. Links within these pages may be affiliate links that pay me for referring you to them. That's mostly insignificant amounts of money; whenever it is not I have made my relationship plain. If you have any question, please do feel free to contact me.</b></i></p> <div style="font-size:80%"> <table> <tr> <td> - </td> <td><a href="http://aplawrence.com/Tests">Skills Tests</a></td> <td> - </td> <td><a href="http://aplawrence.com/psst.html">Psst - wanna work for yourself?</a></td> <td> - </td> <td><a href="http://aplawrence.com/troubleshootingbook.html">Unix/Linux Troubleshooting e-book</a></td> <td> - </td> <td><a href="http://aplawrence.com/Kerio">Kerio Mail Server</a></td> <td> - </td> <td><a href="http://aplawrence.com/rates.html">Consulting</a></td> <td> - </td> <td><a href="http://aplawrence.com/advert.html">Advertise Here</a></td> </tr> </table> </div> <p><a href="http://feedads.g.doubleclick.net/~a/8fzMLgqky8eWB0OH3JnUxwpKmFA/0/da"><img src="http://feedads.g.doubleclick.net/~a/8fzMLgqky8eWB0OH3JnUxwpKmFA/0/di" border="0" ismap="true"></img></a><br/> <a href="http://feedads.g.doubleclick.net/~a/8fzMLgqky8eWB0OH3JnUxwpKmFA/1/da"><img src="http://feedads.g.doubleclick.net/~a/8fzMLgqky8eWB0OH3JnUxwpKmFA/1/di" border="0" ismap="true"></img></a></p><div class="feedflare"> <a href="http://feeds.feedburner.com/~ff/aplawrence/QIhG?a=lyIvDkhFgI0:lirBRZIeWTM:yIl2AUoC8zA"><img src="http://feeds.feedburner.com/~ff/aplawrence/QIhG?d=yIl2AUoC8zA" border="0"></img></a> </div><img src="http://feeds.feedburner.com/~r/aplawrence/QIhG/~4/lyIvDkhFgI0" height="1" width="1"/> http://feedproxy.google.com/~r/aplawrence/QIhG/~3/lyIvDkhFgI0/file-removal.html http://aplawrence.com/Unixart/file-removal.html Shell,Linux,MacOSX ; 2009/10/21<br /> <!-- LEFTADOK --> <!-- PCOUNT --> <!-- PCOUNT --> <p>"Type ess-see-pee-SPACE-john-ATSIGN-192-DOT". The person at the other end of the phone line interrupted me: "Hold on, I typed an extra space".</p> <p>"You mean before 'john''?", I asked, "That doesn't matter".</p> <p><a href="http://aplawrence.com/rss/index.html">Full Text RSS Feed now available</a></p> <p>Comments: <a href="http://aplawrence.com/cgi-bin/newcomm.pl?commenting=/Unixart/plenty-of-space.html">Click Here.</a></p> <p><br /><br /><i><b>Many of the products and books I review are things I purchased for my own use. Some were given to me specifically for the purpose of reviewing them.</b></i></p> <p><i><b>I resell or can earn commissions from the sale of some of these items. Links within these pages may be affiliate links that pay me for referring you to them. That's mostly insignificant amounts of money; whenever it is not I have made my relationship plain. If you have any question, please do feel free to contact me.</b></i></p> <div style="font-size:80%"> <table> <tr> <td> - </td> <td><a href="http://aplawrence.com/Tests">Skills Tests</a></td> <td> - </td> <td><a href="http://aplawrence.com/psst.html">Psst - wanna work for yourself?</a></td> <td> - </td> <td><a href="http://aplawrence.com/troubleshootingbook.html">Unix/Linux Troubleshooting e-book</a></td> <td> - </td> <td><a href="http://aplawrence.com/Kerio">Kerio Mail Server</a></td> <td> - </td> <td><a href="http://aplawrence.com/rates.html">Consulting</a></td> <td> - </td> <td><a href="http://aplawrence.com/advert.html">Advertise Here</a></td> </tr> </table> </div> <p><a href="http://feedads.g.doubleclick.net/~a/IHN27trf4gVbxBXKWdXgrMKz-DU/0/da"><img src="http://feedads.g.doubleclick.net/~a/IHN27trf4gVbxBXKWdXgrMKz-DU/0/di" border="0" ismap="true"></img></a><br/> <a href="http://feedads.g.doubleclick.net/~a/IHN27trf4gVbxBXKWdXgrMKz-DU/1/da"><img src="http://feedads.g.doubleclick.net/~a/IHN27trf4gVbxBXKWdXgrMKz-DU/1/di" border="0" ismap="true"></img></a></p><div class="feedflare"> <a href="http://feeds.feedburner.com/~ff/aplawrence/QIhG?a=ICUIRThP8_o:5PUI5-OjqJ0:yIl2AUoC8zA"><img src="http://feeds.feedburner.com/~ff/aplawrence/QIhG?d=yIl2AUoC8zA" border="0"></img></a> </div><img src="http://feeds.feedburner.com/~r/aplawrence/QIhG/~4/ICUIRThP8_o" height="1" width="1"/> http://feedproxy.google.com/~r/aplawrence/QIhG/~3/ICUIRThP8_o/plenty-of-space.html http://aplawrence.com/Unixart/plenty-of-space.html Linux ; 2009/10/08 by Bill Mohrhardt <br /> <!-- LEFTADOK --> <!-- PCOUNT --> <!-- PCOUNT --> <p>I am working on building a Linux box to replace our old SCO Openserver machine, and I had a spare Digi host card and concentrator, so I needed to install &amp; configure those. Red Hat Enterprise Linux 5 was not listed, so I called Tech Support to ask which version I should try. The tech said to try dgap-1.3-15.src.rpm, the most recent beta version of dgap from Digi's website. He said that if I wanted support I would have to pay $75, as the PCI host card whose serial # I gave to him had its warranty expire in 2004. Fine, I proceeded on my own, as usual.</p> <p>Now, given that I installed RHEL 5.3 from rpms, and did not compile my own kernel, I figured that I would be missing some packages, but it turned into a major pain. First of all, Digi's instructions require rpmbuild, so thanks to pbone.net, I got rpm-build-4.4.2.3-9.el5.i386.rpm, and that installed nicely. Then, the dgap source said that it needed elfutils, so I eventually found the elfutils matching my version on RHEL5 elfutils-0.137-3.el5.i386.rpm. Oddly, when I checked rpm -qa | grep elfutils, my RHEL5 had elfutils-libelf-0.137-3.el5 and elfutils-libs-0.137-3.el5, but not just the plain elfutils.... Whatever, that rpm'ed fine. But then, the dgap install got most of the way finished, and complained that it needed curses (funny, I had already been providing some of those!). When I checked my rpms, I had ncurses but not curses. I tried setting curses as a symlink to the most recent ncurses library but that did not work. I Googled around, and one linux site said that I needed the ncurses-devel package, but when I downloaded and tried to rpm that one, it said that it needed some other libraries, so I decided to go home at that point.</p> <p><a href="http://aplawrence.com/rss/index.html">Full Text RSS Feed now available</a></p> <p>Comments: <a href="http://aplawrence.com/cgi-bin/newcomm.pl?commenting=/Linux/follow-dependencies.html">Click Here.</a></p> <p><br /><br /><i><b>Many of the products and books I review are things I purchased for my own use. Some were given to me specifically for the purpose of reviewing them.</b></i></p> <p><i><b>I resell or can earn commissions from the sale of some of these items. Links within these pages may be affiliate links that pay me for referring you to them. That's mostly insignificant amounts of money; whenever it is not I have made my relationship plain. If you have any question, please do feel free to contact me.</b></i></p> <div style="font-size:80%"> <table> <tr> <td> - </td> <td><a href="http://aplawrence.com/Tests">Skills Tests</a></td> <td> - </td> <td><a href="http://aplawrence.com/psst.html">Psst - wanna work for yourself?</a></td> <td> - </td> <td><a href="http://aplawrence.com/troubleshootingbook.html">Unix/Linux Troubleshooting e-book</a></td> <td> - </td> <td><a href="http://aplawrence.com/Kerio">Kerio Mail Server</a></td> <td> - </td> <td><a href="http://aplawrence.com/rates.html">Consulting</a></td> <td> - </td> <td><a href="http://aplawrence.com/advert.html">Advertise Here</a></td> </tr> </table> </div> <p><a href="http://feedads.g.doubleclick.net/~a/REPiyDFG4DEiUa19U6eUVvKKA1g/0/da"><img src="http://feedads.g.doubleclick.net/~a/REPiyDFG4DEiUa19U6eUVvKKA1g/0/di" border="0" ismap="true"></img></a><br/> <a href="http://feedads.g.doubleclick.net/~a/REPiyDFG4DEiUa19U6eUVvKKA1g/1/da"><img src="http://feedads.g.doubleclick.net/~a/REPiyDFG4DEiUa19U6eUVvKKA1g/1/di" border="0" ismap="true"></img></a></p><div class="feedflare"> <a href="http://feeds.feedburner.com/~ff/aplawrence/QIhG?a=Ez7OAo5GsZU:6Gt5JoLDUP8:yIl2AUoC8zA"><img src="http://feeds.feedburner.com/~ff/aplawrence/QIhG?d=yIl2AUoC8zA" border="0"></img></a> </div><img src="http://feeds.feedburner.com/~r/aplawrence/QIhG/~4/Ez7OAo5GsZU" height="1" width="1"/> http://feedproxy.google.com/~r/aplawrence/QIhG/~3/Ez7OAo5GsZU/follow-dependencies.html http://aplawrence.com/Linux/follow-dependencies.html Linux,MacOSX,Lighter ; 2009/10/06<br /> <br /><br /> <!-- LEFTADOK --> <!-- PCOUNT --> <!-- PCOUNT --> <p><i>I don't know when or why I wrote this. It couldn't have been too long ago; I first bought an iBook in December of 2002. It apparently was in response to someone who said their professor advised them not to use Linux. Whatever, whenever, here it is:</i></p> <p><i>Oh, I found it at <a href="http://www.plex86.org/linux2/His-Pastor-Says-Unix-Sucks-and-Is-Not-Real-Linux.html">Plex86.org</a>. I thank them for preserving it - I had forgotten it entirely.</i></p> <p><a href="http://aplawrence.com/rss/index.html">Full Text RSS Feed now available</a></p> <p>Comments: <a href="http://aplawrence.com/cgi-bin/newcomm.pl?commenting=/Linux/one-true-religion.html">Click Here.</a></p> <p><br /><br /><i><b>Many of the products and books I review are things I purchased for my own use. Some were given to me specifically for the purpose of reviewing them.</b></i></p> <p><i><b>I resell or can earn commissions from the sale of some of these items. Links within these pages may be affiliate links that pay me for referring you to them. That's mostly insignificant amounts of money; whenever it is not I have made my relationship plain. If you have any question, please do feel free to contact me.</b></i></p> <div style="font-size:80%"> <table> <tr> <td> - </td> <td><a href="http://aplawrence.com/Tests">Skills Tests</a></td> <td> - </td> <td><a href="http://aplawrence.com/psst.html">Psst - wanna work for yourself?</a></td> <td> - </td> <td><a href="http://aplawrence.com/troubleshootingbook.html">Unix/Linux Troubleshooting e-book</a></td> <td> - </td> <td><a href="http://aplawrence.com/Kerio">Kerio Mail Server</a></td> <td> - </td> <td><a href="http://aplawrence.com/rates.html">Consulting</a></td> <td> - </td> <td><a href="http://aplawrence.com/advert.html">Advertise Here</a></td> </tr> </table> </div> <p><a href="http://feedads.g.doubleclick.net/~a/IvwOHs46FrLLRykc9Rqsmm97EF0/0/da"><img src="http://feedads.g.doubleclick.net/~a/IvwOHs46FrLLRykc9Rqsmm97EF0/0/di" border="0" ismap="true"></img></a><br/> <a href="http://feedads.g.doubleclick.net/~a/IvwOHs46FrLLRykc9Rqsmm97EF0/1/da"><img src="http://feedads.g.doubleclick.net/~a/IvwOHs46FrLLRykc9Rqsmm97EF0/1/di" border="0" ismap="true"></img></a></p><div class="feedflare"> <a href="http://feeds.feedburner.com/~ff/aplawrence/QIhG?a=BOT2KCVU0rA:saAOSDne1CI:yIl2AUoC8zA"><img src="http://feeds.feedburner.com/~ff/aplawrence/QIhG?d=yIl2AUoC8zA" border="0"></img></a> </div><img src="http://feeds.feedburner.com/~r/aplawrence/QIhG/~4/BOT2KCVU0rA" height="1" width="1"/> http://feedproxy.google.com/~r/aplawrence/QIhG/~3/BOT2KCVU0rA/one-true-religion.html http://aplawrence.com/Linux/one-true-religion.html Books,Reviews,Networking,Microsoft,Linux,MacOSX ; 2009/10/07<br /> <div class="hReview"> <div class="item"> <p><a href="http://www.aplawrence.com/Books/bysubject.html" target= "_self">Index by Subject</a></p> <ul> <li><span class="fn">Network Know-How</span></li> <li>John Ross</li> <li>1593271913</li> </ul><br /><br /> <!-- LEFTADOK --> <!-- PCOUNT --> <!-- PCOUNT --> <div class="summary"> <p>This is the book I'd give to someone who needed to learn a lot about computer networking quickly.</p> <p><a href="http://aplawrence.com/rss/index.html">Full Text RSS Feed now available</a></p> <p>Comments: <a href="http://aplawrence.com/cgi-bin/newcomm.pl?commenting=/Books/network-know-how.html">Click Here.</a></p> <p><br /><br /><i><b>Many of the products and books I review are things I purchased for my own use. Some were given to me specifically for the purpose of reviewing them.</b></i></p> <p><i><b>I resell or can earn commissions from the sale of some of these items. Links within these pages may be affiliate links that pay me for referring you to them. That's mostly insignificant amounts of money; whenever it is not I have made my relationship plain. If you have any question, please do feel free to contact me.</b></i></p> <div style="font-size:80%"> <table> <tr> <td> - </td> <td><a href="http://aplawrence.com/Tests">Skills Tests</a></td> <td> - </td> <td><a href="http://aplawrence.com/psst.html">Psst - wanna work for yourself?</a></td> <td> - </td> <td><a href="http://aplawrence.com/troubleshootingbook.html">Unix/Linux Troubleshooting e-book</a></td> <td> - </td> <td><a href="http://aplawrence.com/Kerio">Kerio Mail Server</a></td> <td> - </td> <td><a href="http://aplawrence.com/rates.html">Consulting</a></td> <td> - </td> <td><a href="http://aplawrence.com/advert.html">Advertise Here</a></td> </tr> </table> </div> <p><a href="http://feedads.g.doubleclick.net/~a/Kzclp7p6zE9-56vjS3ot4jYG0DY/0/da"><img src="http://feedads.g.doubleclick.net/~a/Kzclp7p6zE9-56vjS3ot4jYG0DY/0/di" border="0" ismap="true"></img></a><br/> <a href="http://feedads.g.doubleclick.net/~a/Kzclp7p6zE9-56vjS3ot4jYG0DY/1/da"><img src="http://feedads.g.doubleclick.net/~a/Kzclp7p6zE9-56vjS3ot4jYG0DY/1/di" border="0" ismap="true"></img></a></p><div class="feedflare"> <a href="http://feeds.feedburner.com/~ff/aplawrence/QIhG?a=8XkZB2jH5ik:lPOE-Y9Vp5w:yIl2AUoC8zA"><img src="http://feeds.feedburner.com/~ff/aplawrence/QIhG?d=yIl2AUoC8zA" border="0"></img></a> </div><img src="http://feeds.feedburner.com/~r/aplawrence/QIhG/~4/8XkZB2jH5ik" height="1" width="1"/> http://feedproxy.google.com/~r/aplawrence/QIhG/~3/8XkZB2jH5ik/network-know-how.html http://aplawrence.com/Books/network-know-how.html Programming,Girish,Shell,Linux ; 2009/10/05 by Girish Venkatachalam <br /> <p><i>Girish Venkatachalam is a UNIX hacker with more than a decade of networking and crypto programming experience. His hobbies include yoga,cycling, cooking and he <a href="http://gayatri-hitech.com/about.html">runs his own business.</a> Details here:</i><br /><br /> <a href="http://gayatri-hitech.com">http://gayatri-hitech.com</a> <br /><a href="http://spam-cheetah.com">http://spam-cheetah.com</a> </p> <!-- LEFTADOK --> <!-- PCOUNT --> <!-- PCOUNT --> <p> People who have a necessity to publish source code for public view like myself and Tony will benefit by this article. </p> <p><a href="http://aplawrence.com/rss/index.html">Full Text RSS Feed now available</a></p> <p>Comments: <a href="http://aplawrence.com/cgi-bin/newcomm.pl?commenting=/Girish/vim-tips.html">Click Here.</a></p> <p><br /><br /><i><b>Many of the products and books I review are things I purchased for my own use. Some were given to me specifically for the purpose of reviewing them.</b></i></p> <p><i><b>I resell or can earn commissions from the sale of some of these items. Links within these pages may be affiliate links that pay me for referring you to them. That's mostly insignificant amounts of money; whenever it is not I have made my relationship plain. If you have any question, please do feel free to contact me.</b></i></p> <div style="font-size:80%"> <table> <tr> <td> - </td> <td><a href="http://aplawrence.com/Tests">Skills Tests</a></td> <td> - </td> <td><a href="http://aplawrence.com/psst.html">Psst - wanna work for yourself?</a></td> <td> - </td> <td><a href="http://aplawrence.com/troubleshootingbook.html">Unix/Linux Troubleshooting e-book</a></td> <td> - </td> <td><a href="http://aplawrence.com/Kerio">Kerio Mail Server</a></td> <td> - </td> <td><a href="http://aplawrence.com/rates.html">Consulting</a></td> <td> - </td> <td><a href="http://aplawrence.com/advert.html">Advertise Here</a></td> </tr> </table> </div> <p><a href="http://feedads.g.doubleclick.net/~a/RITDunBuoYqRvy8UajMK11KEqCA/0/da"><img src="http://feedads.g.doubleclick.net/~a/RITDunBuoYqRvy8UajMK11KEqCA/0/di" border="0" ismap="true"></img></a><br/> <a href="http://feedads.g.doubleclick.net/~a/RITDunBuoYqRvy8UajMK11KEqCA/1/da"><img src="http://feedads.g.doubleclick.net/~a/RITDunBuoYqRvy8UajMK11KEqCA/1/di" border="0" ismap="true"></img></a></p><div class="feedflare"> <a href="http://feeds.feedburner.com/~ff/aplawrence/QIhG?a=ZYtzLRZ7f7Q:R8FNIYTB1Z4:yIl2AUoC8zA"><img src="http://feeds.feedburner.com/~ff/aplawrence/QIhG?d=yIl2AUoC8zA" border="0"></img></a> </div><img src="http://feeds.feedburner.com/~r/aplawrence/QIhG/~4/ZYtzLRZ7f7Q" height="1" width="1"/> http://feedproxy.google.com/~r/aplawrence/QIhG/~3/ZYtzLRZ7f7Q/vim-tips.html http://aplawrence.com/Girish/vim-tips.html Programming,Girish,Shell,Linux ; 2009/10/04 by Girish Venkatachalam <br /><i>Girish Venkatachalam is a UNIX hacker with more than a decade of networking and crypto programming experience. His hobbies include yoga,cycling, cooking and he <a href="http://gayatri-hitech.com/about.html">runs his own business.</a> Details here:</i><br /><br /> <a href="http://gayatri-hitech.com">http://gayatri-hitech.com</a> <br /><a href="http://spam-cheetah.com">http://spam-cheetah.com</a> <br /><br /> <p> I type </p> <pre> $ dict vim vim n 1: a healthy capacity for vigorous activity; &quot;jogging works off my excess energy&quot;; &quot;he seemed full of vim and vigor&quot; [syn: {energy}, {vitality}] 2: an imaginative lively style (especially style of writing); &quot;his writing conveys great energy&quot; [syn: {energy}, {vigor}, {vigour}] </pre> <!-- LEFTADOK --> <p> and got this along with the idea that there is also an editor by name Vim of course. It also goes on to tell me that Vim stands for &quot;VI Improved&quot;. </p> <p><a href="http://aplawrence.com/rss/index.html">Full Text RSS Feed now available</a></p> <p>Comments: <a href="http://aplawrence.com/cgi-bin/newcomm.pl?commenting=/Girish/vim.html">Click Here.</a></p> <p><br /><br /><i><b>Many of the products and books I review are things I purchased for my own use. Some were given to me specifically for the purpose of reviewing them.</b></i></p> <p><i><b>I resell or can earn commissions from the sale of some of these items. Links within these pages may be affiliate links that pay me for referring you to them. That's mostly insignificant amounts of money; whenever it is not I have made my relationship plain. If you have any question, please do feel free to contact me.</b></i></p> <div style="font-size:80%"> <table> <tr> <td> - </td> <td><a href="http://aplawrence.com/Tests">Skills Tests</a></td> <td> - </td> <td><a href="http://aplawrence.com/psst.html">Psst - wanna work for yourself?</a></td> <td> - </td> <td><a href="http://aplawrence.com/troubleshootingbook.html">Unix/Linux Troubleshooting e-book</a></td> <td> - </td> <td><a href="http://aplawrence.com/Kerio">Kerio Mail Server</a></td> <td> - </td> <td><a href="http://aplawrence.com/rates.html">Consulting</a></td> <td> - </td> <td><a href="http://aplawrence.com/advert.html">Advertise Here</a></td> </tr> </table> </div> <p><a href="http://feedads.g.doubleclick.net/~a/o6EnpKfMulIGE2xhlTm9wYfqqtQ/0/da"><img src="http://feedads.g.doubleclick.net/~a/o6EnpKfMulIGE2xhlTm9wYfqqtQ/0/di" border="0" ismap="true"></img></a><br/> <a href="http://feedads.g.doubleclick.net/~a/o6EnpKfMulIGE2xhlTm9wYfqqtQ/1/da"><img src="http://feedads.g.doubleclick.net/~a/o6EnpKfMulIGE2xhlTm9wYfqqtQ/1/di" border="0" ismap="true"></img></a></p><div class="feedflare"> <a href="http://feeds.feedburner.com/~ff/aplawrence/QIhG?a=FJVY3YpLcj0:IYv_gBIFzQ0:yIl2AUoC8zA"><img src="http://feeds.feedburner.com/~ff/aplawrence/QIhG?d=yIl2AUoC8zA" border="0"></img></a> </div><img src="http://feeds.feedburner.com/~r/aplawrence/QIhG/~4/FJVY3YpLcj0" height="1" width="1"/> http://feedproxy.google.com/~r/aplawrence/QIhG/~3/FJVY3YpLcj0/vim.html http://aplawrence.com/Girish/vim.html Linux ; 2009/09/25<br /><br /> <!-- LEFTADOK --> <!-- PCOUNT --> <!-- PCOUNT --> <p>Single user mode (init 1, init S) is sometimes necessary but inconvenient. Why not have tty2 (or any other tty) available to use with the console Alt-Function keys?</p> <p>On the old SCO systems, I could just do <a href="http://aplawrence.com/SCOFAQ/FAQ_scotec6init4.html">"init 4"</a> and that would enable all the virtual consoles. Linux systems don't provide this capability so directly, but it's easy enough to get what you want.</p> <p><a href="http://aplawrence.com/rss/index.html">Full Text RSS Feed now available</a></p> <p>Comments: <a href="http://aplawrence.com/cgi-bin/newcomm.pl?commenting=/Linux/multiple-consoles.html">Click Here.</a></p> <p><br /><br /><i><b>Many of the products and books I review are things I purchased for my own use. Some were given to me specifically for the purpose of reviewing them.</b></i></p> <p><i><b>I resell or can earn commissions from the sale of some of these items. Links within these pages may be affiliate links that pay me for referring you to them. That's mostly insignificant amounts of money; whenever it is not I have made my relationship plain. If you have any question, please do feel free to contact me.</b></i></p> <div style="font-size:80%"> <table> <tr> <td> - </td> <td><a href="http://aplawrence.com/Tests">Skills Tests</a></td> <td> - </td> <td><a href="http://aplawrence.com/psst.html">Psst - wanna work for yourself?</a></td> <td> - </td> <td><a href="http://aplawrence.com/troubleshootingbook.html">Unix/Linux Troubleshooting e-book</a></td> <td> - </td> <td><a href="http://aplawrence.com/Kerio">Kerio Mail Server</a></td> <td> - </td> <td><a href="http://aplawrence.com/rates.html">Consulting</a></td> <td> - </td> <td><a href="http://aplawrence.com/advert.html">Advertise Here</a></td> </tr> </table> </div> <p><a href="http://feedads.g.doubleclick.net/~a/6VMON38Fc5YY5ZRRO3OYzlQ6Ajs/0/da"><img src="http://feedads.g.doubleclick.net/~a/6VMON38Fc5YY5ZRRO3OYzlQ6Ajs/0/di" border="0" ismap="true"></img></a><br/> <a href="http://feedads.g.doubleclick.net/~a/6VMON38Fc5YY5ZRRO3OYzlQ6Ajs/1/da"><img src="http://feedads.g.doubleclick.net/~a/6VMON38Fc5YY5ZRRO3OYzlQ6Ajs/1/di" border="0" ismap="true"></img></a></p><div class="feedflare"> <a href="http://feeds.feedburner.com/~ff/aplawrence/QIhG?a=U5NfF3HrIbg:JsXlr3CV8C4:yIl2AUoC8zA"><img src="http://feeds.feedburner.com/~ff/aplawrence/QIhG?d=yIl2AUoC8zA" border="0"></img></a> </div><img src="http://feeds.feedburner.com/~r/aplawrence/QIhG/~4/U5NfF3HrIbg" height="1" width="1"/> http://feedproxy.google.com/~r/aplawrence/QIhG/~3/U5NfF3HrIbg/multiple-consoles.html http://aplawrence.com/Linux/multiple-consoles.html ,Linux,Security,Misc. ; <h2>SELinux - love it or leave it</h2> September 2009 <br /> <!-- LEFTADOK --> <!-- PCOUNT --> <!-- PCOUNT --> <p>SELinux is a <a href="http://aplawrence.com/Words/2004_12_20.html">Mandatory Access Control</a> system. You can get an idea of how you'd configure this at my <a href="http://aplawrence.com/Linux/basic_selinux.html">Selinux on FC5</a> article even though it's a few years old, but before you read that, just let me put on my flame proof suit here... ok, I'm ready: I almost always disable SELinux sooner or later.</p> <p>Yeah, really. I think SELinux is a wonderful, wonderful idea. If used properly, it really can help make your system more secure. My problem is that it doesn't get used properly. So upgrades get done and the people who do the scripts forget all about SELinux and what YOU get is a broken app or a broken system. This happens all too frequently, and unless you are willing to have constant vigilance, SELinux (or lack of due digilence with regard to it), will bite you sooner or later.</p> <p><a href="http://aplawrence.com/rss/index.html">Full Text RSS Feed now available</a></p> <p>Comments: <a href="http://aplawrence.com/cgi-bin/newcomm.pl?commenting=/Words/2004_09_30.html">Click Here.</a></p> <p><br /><br /><i><b>Many of the products and books I review are things I purchased for my own use. Some were given to me specifically for the purpose of reviewing them.</b></i></p> <p><i><b>I resell or can earn commissions from the sale of some of these items. Links within these pages may be affiliate links that pay me for referring you to them. That's mostly insignificant amounts of money; whenever it is not I have made my relationship plain. If you have any question, please do feel free to contact me.</b></i></p> <div style="font-size:80%"> <table> <tr> <td> - </td> <td><a href="http://aplawrence.com/Tests">Skills Tests</a></td> <td> - </td> <td><a href="http://aplawrence.com/psst.html">Psst - wanna work for yourself?</a></td> <td> - </td> <td><a href="http://aplawrence.com/troubleshootingbook.html">Unix/Linux Troubleshooting e-book</a></td> <td> - </td> <td><a href="http://aplawrence.com/Kerio">Kerio Mail Server</a></td> <td> - </td> <td><a href="http://aplawrence.com/rates.html">Consulting</a></td> <td> - </td> <td><a href="http://aplawrence.com/advert.html">Advertise Here</a></td> </tr> </table> </div> <p><a href="http://feedads.g.doubleclick.net/~a/iOawH-C-8R2vvlcaabz_HPKr8yQ/0/da"><img src="http://feedads.g.doubleclick.net/~a/iOawH-C-8R2vvlcaabz_HPKr8yQ/0/di" border="0" ismap="true"></img></a><br/> <a href="http://feedads.g.doubleclick.net/~a/iOawH-C-8R2vvlcaabz_HPKr8yQ/1/da"><img src="http://feedads.g.doubleclick.net/~a/iOawH-C-8R2vvlcaabz_HPKr8yQ/1/di" border="0" ismap="true"></img></a></p><div class="feedflare"> <a href="http://feeds.feedburner.com/~ff/aplawrence/QIhG?a=CtHAXwj6ww0:TO2KuN32HwY:yIl2AUoC8zA"><img src="http://feeds.feedburner.com/~ff/aplawrence/QIhG?d=yIl2AUoC8zA" border="0"></img></a> </div><img src="http://feeds.feedburner.com/~r/aplawrence/QIhG/~4/CtHAXwj6ww0" height="1" width="1"/> http://feedproxy.google.com/~r/aplawrence/QIhG/~3/CtHAXwj6ww0/2004_09_30.html http://aplawrence.com/Words/2004_09_30.html OSR5,Linux,Samba ; 2009/09/16 by Bill Mohrhardt <br /><br /> <!-- LEFTADOK --> <!-- PCOUNT --> <!-- PCOUNT --> <p> I have about 600 files in my shared drive /1/users/prog. Now, I unfortunately created many of those files when I was logged in as root. So, each time I call up a File Browser window on my Linux box to view /mnt/narcoa/1/users/prog, Facetwin writes a message to /usr/adm/syslog every time it finds a file in my /1/users/prog that has ownership other than prog! I often wondered why there was such a delay in building the window. I did a series of chown &amp; chgrp, and removed some really old files, and now the window comes up in one-tenth of the time. I really need to check other users' shared drives as well, this is one big reason why my /usr/adm/syslog gets so bloated.</p> <p>I wonder how many of us dinosaurs are out there who might benefit from it? I think it is an issue unique to Facetwin, but I have not tried samba yet, so maybe that wastes time updating similar logs. I have similar messages that come up in the case of one machine shared by multiple users. The /etc/rc.local executes the smbmount as one user, but when another user is logged on, and browses the shared drive, the /usr/adm/syslog is like the energizer bunny, it keeps going, and going....</p> <p><a href="http://aplawrence.com/rss/index.html">Full Text RSS Feed now available</a></p> <p>Comments: <a href="http://aplawrence.com/cgi-bin/newcomm.pl?commenting=/Unixart/facetwin-logs.html">Click Here.</a></p> <p><br /><br /><i><b>Many of the products and books I review are things I purchased for my own use. Some were given to me specifically for the purpose of reviewing them.</b></i></p> <p><i><b>I resell or can earn commissions from the sale of some of these items. Links within these pages may be affiliate links that pay me for referring you to them. That's mostly insignificant amounts of money; whenever it is not I have made my relationship plain. 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