http://www.frozenindustries.com A Project Blog Tue, 04 Nov 2008 18:49:36 +0000 http://backend.userland.com/rss092 en Scan a system for RAID arrays and save findings so the array reappears across reboots: mdadm --detail --scan >> /etc/mdadm/mdadm.conf Create a RAID5 array out of sdm1, sdj1, and sdk1 (all partitioned with raid-autodetect partitions) mdadm --create /dev/md1 --level=5 --raid-devices=3 /dev/sd[mjk]1 http://www.frozenindustries.com/2008/11/04/building-and-finding-raid-arrays/ Quick instructions to get Folding@home (or any other program) to run at boot before user login on Ubuntu Linux. This probably works on other distros with an rc.local file too. 1. Install F@H client, mine is in /opt/folding 2. Create a simple script, I called mine folding.sh and is only has: #!/bin/bash cd /opt/folding ./fah6 ... http://www.frozenindustries.com/2008/03/01/start-foldinghome-on-boot-with-screen-on-ubuntu-linux/ Quick instructions to getting Tripwire installed and running on Ubuntu 6.06 LTS (Dapper Drake). For more detailed instructions check out this site. 1. Install Tripwire. Say Yes to everything, and create some passwords. % sudo apt-get install tripwire % sudo tripwire -m i 2. Fix the policy. I was getting many errors that ... http://www.frozenindustries.com/2007/12/23/tripwire-on-ubuntu-606/ I used this to start fetchmail on an Ubuntu 7.10 server running Request Tracker. Edit /etc/rc.local, add your command, make sure it doesn't create any output. This is my command: su rt -c "fetchmail -d 300" > /dev/null 2>&1 It starts a background fetchmail process as the "rt" user, just as the ... http://www.frozenindustries.com/2007/10/10/run-a-command-on-boot-for-ubuntu/ Dear Intel, Thank you for including Windows AHCI drivers on floppy disks with your new DQ35JO motherboard. However, putting a floppy disk drive controller on the motherboard would be useful too. Thanks, Nick http://www.frozenindustries.com/2007/09/11/erm/ /dev/md0: Timing buffered disk reads: 1248 MB in 3.00 seconds = 415.65 MB/sec http://www.frozenindustries.com/2007/06/22/hdparm-t-devmd0/ mdadm - kernel - distro 1.12.0 - 2.6.15 - Ubuntu 6.06 LTS 2.5.6 - 2.6.20 - Ubuntu 7.04 2.6.3 - 2.6.24 - Ubuntu 8.04 LTS 2.6.7 - 2.6.27 - Ubuntu 8.10 1.12.0 - 2.6.9 - CentOS 4.5 2.5.4 - 2.6.18 - CentOS 5.0 2.5.6 - 2.6.18 - Debian 4.0r0 2.6.1 - 2.6.21 - ... http://www.frozenindustries.com/2007/06/16/mdadm-versions/ # cat /proc/mdstat md0 : active raid5 sdf1[7] sdb1[0] sde1[5] sdg1[4] sdh1[3] sdd1[2] sdc1[1] 1465175424 blocks level 5, 64k chunk, algorithm 2 [7/6] [UUUUUU_] [>....................] recovery = 1.3% (3331200/244195904) finish=2357.0min speed=1700K/sec Ouch. Two files are used to control the speed of rebuilding RAID arrays in Linux. /proc/sys/dev/raid/speed_limit_min /proc/sys/dev/raid/speed_limit_max Even though my _max file is set ... http://www.frozenindustries.com/2007/05/16/speed-up-rebuilding-linux-raid-arrarys/ $ cdrdao drive-info /dev/scd0 Cdrdao version 1.2.2 - (C) Andreas Mueller <andreas@daneb.de> SCSI interface library - (C) Joerg Schilling Paranoia DAE library - (C) Monty Check http://cdrdao.sourceforge.net/drives.html#dt for current driver tables. Using libscg version 'ubuntu-0.8ubuntu1' /dev/cdrw: LITE-ON DVDRW LH-20A1S Rev: 9L02 Using driver: Generic SCSI-3/MMC - Version 2.0 (options 0x0000) Maximum reading ... http://www.frozenindustries.com/2007/05/14/find-the-model-number-of-your-dvd-burner-in-linux/ Instructions here. http://www.frozenindustries.com/2007/05/11/install-the-ubuntu-studio-theme-in-ubuntu-feisty/