Repeat last command
-:- !!
Repeat last argument in current command
-:- !$
Kernel log message command
-:- dmesg
File usage
-:- du -hsx
h - human, s - summarize,
x - single fs
Umount a busy drive
-:- kill -9 'lsof +D /mnt/cdrom'
(list open files, +D=directory and contents)
2 0 2 4...
✓ -:- G second group, g main group, u user ID num, d home, s shell
Set user password
✓ -:- passwd --stdin <user>
Delete user account AND home dir
✓ -:- userdel -r
r = remove
Force user password change
✓ -:- chage -d 0 <user>
change + age
4|Page | Grade A+| 2024/2025
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