Difference between revisions of "User:Scott/02"

Revision as of 04:47, 19 October 2011

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- Useful Tech Support Commands
+{{db-g7}}
- Home Page     [[user:scott]]
+<br>
- Dir & Files   [[user:scott03]]
- Network       [[user:scott04]]
- Troubleshoot  [[user:scott05]]
-{{TOC limit|limit=1}}
+Delete This Page
-__TOC__
-<h5>PRINTME - /var/lib/freegeek-extras/printme</h5>
-==Backup Password==
-*cp /etc/shadow /etc/shadow.bak - (hash of root + user)
-===Change Password===
+<br>
- passwd [username]
- passwd –e [username] – (change on startup)
-===Add / Delete User===
- adduser [username]
- adduser [username] admin
- userdel [username]
-==Updates & Broken Packages==
- apt-get update
- apt-get dist-upgrade
- apt-get install --fix-broken
- apt-get autoremove
- apt-get install ubuntu-desktop
- apt-get purge xxx
-==File System Check==
- fsidk -l
- fsck -fyv /dev/sda1 (f=force y=fix)
- shutdown -rF now (reboot, forcing fsck on root filesystem)
-===Mount & un-Mount===
- df -h          (show partition booted from)
- ls /media      (mounted from GUI)
- cat /etc/fstab (partitions and devices = mount on start-up)
- mount /dev/sdb1 /mnt/xxx
- umount /dev/sdb1 (sudo)
-===Badblocks===
- badblocks -nvs /dev/sda1
-==Backup Home Directory==
-*date (e.g. 20121223 for Dec 23 2012)
-===ssh into tsbackup===
- ssh XC tsbackup@tsbackup.fglan nautilus
- ctrl-c (to back-out)
-===Backup===
- sudo cp /etc/passwd /etc/shadow /etc/group /home/
- dpkg --get-selections > dpkg.out
- sudo mv dpkg.out /home/
- sudo tar -czf /home/etc.backup.tar.gz /etc/
- sudo rsync -avzh /home/ tsbackup@tsbackup:/var/tsbackup/[date-ticketnumber] 2>rsync.log
- View error log less rsync.log
-<pre>Note: on the '''data recovery box''' you will need to add /mnt/sdb1 in front of /home
-      this avoids the need to chroot.</pre>
- dpkg --get-selections --admindir=/mnt/sdb1/var/lib/dpkg >dpkg.out
-===Restore===
- sudo rsync -avzh  tsbackup@tsbackup:/var/tsbackup/[date-ticketnumber]/ /home
- sudo dpkg --set-selections < /home/dpkg.out
- sudo apt-get -u dselect-upgrade
- copy (user passwd) hash from original /etc/shadow
-===Restore User Permissions===
-*Create a New User (oem or Bob or Mark) - with Admin. Privileges
-**drwxr-xr-x 23 1001 1001 4096 2011-07-07 13:28 oem
- chown –R oem:oem /home/oem (recursively for all sub directories)
-==File Permissions==
- chmod 774 dir-name (dir)   rwxrwxr--
- chmod 664 filename (files) rw-rw-r--
- chmod ugo+rwx /dir/file
- chmod ugo-rwx /dir/file
-==Stress Test==
-* [http://wiki.freegeek.org/index.php/CPU_Temperature CPU Temperature]
- while  [[ true ]] ; do uptime ; sensors ; sleep 30s; done | tee temp_load.log
- stress --cpu 8 --io 4 --vm  2 --vm-bytes 128M  --timeout 4h
-*(add --hdd 2 to stress the hard drive as well, though this shouldn't be necessary)
-==Hardware & Resource ID==
-===lshw===
- sudo lshw (hardware config)
-===CPU===
- cat /proc/cpuinfo or more /proc/cpuinfo
-===Disk Usage===
- du -sh (-s disk usage)
- du -sh /home/bob/Downloads/ (disk usage for Downloads)
-===Available Memory===
- free –l (available memory)
- cat /proc/meminfo
-==Devices==
-To see a list of devices currently in use
- cat /proc/devices
-===AlsaMixer===
- alsamixer
-===Printer Drivers===
- http://www.linuxfoundation.org/
- Workgroups -> Open Printing -> Printers
-===HPLIP===
- http://hplipopensource.com/hplip-web/downloads.html

Difference between revisions of "User:Scott/02"

Revision as of 04:47, 19 October 2011

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