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OT: piped greps with regex
by Mr. X 04 Jan '10

04 Jan '10

List, Happy NY. >From the bash command below, I'm trying to parse out the startsector value: $ sudo file mini_vusb.img mini_vusb.img: x86 boot sector, Microsoft Windows XP MBR, Serial 0x25d84; partition 1: ID=0xe, active, starthead 1, startsector 32, 390496 sectors First try was with grep/egrep but I wanted to capture 'startsector 32' as a group (). Nothing came close to working. Fail 1 Next attempt was with Perl file mini_vusb | perl -lane '$i=0 ;for (@F) {print substr($F[$i+1],0,-1) if ($_ eq "startsector"); $i++}' the above works, but it's too much fire power for the job :) Actually I came up with it in a minute or two once I remembered the special var @F. Success 1 Last effort led to this $ sudo file mini_vusb.img | grep -Po 'startsector\s+\d+'| grep -Po '\d+' 32 I like this best. Is there a way to shorten it up? -- Mark

3 2

Sendmail error: auxpropfunc error invalid parameter supplied
by Jussi Hirvi 04 Jan '10

04 Jan '10

I just noticed this error in my messages log after restarting sendmail. The only change I have made is 1) manual fix in /usr/share/spamassassin/72_active.conf 2) sa-update (several times) Now the mail is not running ok, my mail queue keeps growing. Regards, Jussi Hirvi

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Extract Pax archive
by Per Qvindesland 03 Jan '10

03 Jan '10

Hi list Does anyone know how to extract a pax archive in Linux? I have been trying with the pax but with no joy perhaps I did not put in the correct switches. Regards Per Qvindesland

2 2

Monitoring Dynamic IPs using Some network monitoring tool
by Rajagopal Swaminathan 03 Jan '10

03 Jan '10

Greetings, I have one centos server for network monitoring. there are remote devices which are connected through ADSL lines and hence Dynamic IPs Q1. Is there any tool which is capable of handling this type of situation? Q2. Is there a workaround for this problem Regards Rajagopal

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Tiny webserver to run as root
by RedShift 03 Jan '10

03 Jan '10

Hi all Does anyone have a suggestion for some software, a tiny webserver that is able to run as root and execute CGI scripts? It should be smaller than apache and preferably even smaller than lighttpd. It doesn't need a whole lot of features, it only needs to be able to execute CGI scripts. I have tried a few: nanoweb (which is written in php as well) but has some problems with CGI scripts and when it runs in multi process mode it brings the system load up to exactly 1.00. Nullhttpd, but it's old and unmaintained. Tinyhttpd isn't up for the job as well (kept crashing at times). Thanks, Best regards, Glenn

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Setting CDROM parms
by Robert 03 Jan '10

03 Jan '10

My apologies in advance for asking such an elementary question. I called myself searching the Installation Guide and Deployment Guide, with no success. The situation is that I bought a Lite-On ATAPI iHAP122 that will not burn DVDs unless I use hdparm to turn dma off. I bought that drive because it was a rare beige drive. Until I can find a decent DVD burner and/or get a Windows machine put together strictly for doing BIOS updates, running with dma disabled seems to be the best solution. (hdparm -d0 /dev/hdb ) So, my question is, where should I script the command without having to become root each time I wat to burn a DVD? 2.6.18-164.9.1.el5PAE #1 SMP Tue Dec 15 21:41:47 EST 2009 i686 athlon i386 GNU/Linux This is how it always fails: [rj@madeleine ~]$ growisofs -dvd-compat -Z /dev/hdb=/home/rj/KNOPPIX_V6.2DVD-2009-11-18-EN.iso Executing 'builtin_dd if=/home/rj/KNOPPIX_V6.2DVD-2009-11-18-EN.iso of=/dev/hdb obs=32k seek= 0' /dev/hdb: "Current Write Speed" is 16.4x1352KBps. :-[ WRITE@LBA=30h failed with SK=4h/ASC=08h/ACQ=03h]: Input/output error :-( write failed: Input/output error /dev/hdb: flushing cache /dev/hdb: updating RMA /dev/hdb: closing disc [rj@madeleine ~]$

2 2

reading -- and editing -- ebooks
by ken 03 Jan '10

03 Jan '10

Last week I bought a couple books, not ebooks. I considered buying the ebook, but don't want to need a special device/appliance to read it. I'd much prefer to read ebooks on the Linux (CentOS) machine I'm already using. Also, I'd like to be able to programmatically convert the ebook into a format I can edit myself, e.g., HTML. I have no experience owning or purchasing ebooks. Could people who have clue me in on how they work and if the above is possible. Thanks much. -- Without music, life would be a mistake. --Friedrich Nietzsche

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kickstart and logins.def question
by Kwan Lowe 03 Jan '10

03 Jan '10

Hello all: Happy New Year to everyone and thank you for all the knowledge this past year. I have a hopefully simple question about kickstart. In the authconfig section I can enable ldap, credential caching, etc.. Using the GUI tool there's an option to create the user home directories on first login. The docs don't show a similar option for authconfig in kickstart. For now I'm using a sed script in the %post section of the kickstart to replace the entry in /etc/login.defs, but was curious if there is a standard method via a system utility to change this option.

2 3

Sparc?
by Slack-Moehrle 02 Jan '10

02 Jan '10

My 12 year old wants to learn more about servers and has memorized a lot of commands like ls, chmod, du, etc. He wants to have his own domain and server on the web and I have enough Static IP's, so why not foster this interest. I have an old ultra sparc 5. Are there any CentOS versions that support Sparc? Or recommendations? I know OpenBSD does, but I am more versed in Solaris and versions like Slackware or CentOS or Ubuntu. He also says that ZFS rules all and is pissed Apple did not adopt it. Kids will be kids! -Jason

10 19

chroot problem.
by Frank M. Ramaekers 02 Jan '10

02 Jan '10

First, I'm trying to following along on a document on "SecurityFocus" on "Securing MySQL: step-by-step". I'm on step 3.8 "Test the configuration". I have my CHROOT directory structure setup and the chrootuid is failing (haven't figured that one out, yet). So, I simply tried a 'chroot /chroot/mysql' and got: chroot: cannot run command `/bin/bash': No such file or directory I realized that the documentation didn't cover this so I simply: cp -a /bin/bash /chroot/mysql/bin I'm still getting the same error message when I try 'chroot /chroot/mysql': # chroot /chroot/mysql chroot: cannot run command `/bin/bash': No such file or directory It's there, I'm not sure what the problem is: # ls -l /bin/bash -rwxr-xr-x 1 root root 859120 Oct 24 2008 /bin/bash # ls -l /chroot/mysql/bin/bash -rwxr-xr-x 1 root root 859120 Oct 24 2008 /chroot/mysql/bin/bash (I'm performing this as root, since the mysql userid cannot login.) Ideas? Frank M. Ramaekers Jr. Systems Programmer MCP, MCP+I, MCSE & RHCE American Income Life Insurance Co. Phone: (254)761-6649 1200 Wooded Acres Dr. Fax: (254)741-5777 Waco, Texas 76710 _____________________________________________________ This message contains information which is privileged and confidential and is solely for the use of the intended recipient. If you are not the intended recipient, be aware that any review, disclosure, copying, distribution, or use of the contents of this message is strictly prohibited. If you have received this in error, please destroy it immediately and notify us at PrivacyAct(a)ailife.com.

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