User:Scott/02

Useful Tech Support Commands

user:scott

Backup Password

• cp /etc/shadow /etc/shadow.bak - (hash of root + user)

Change Password

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 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