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Basic Linux User Administration

Since this can be a challenge to remember in a pinch, I decided I'd post these basic linux user administration commands.  Please keep in mind that these commands/options are not the same across all distros so your milage may vary.

Lock an Account:

passwd -l {username}

 

Unlock an Account:

passwd -u {username}

 

Display Account Status:

passwd -S {username}

 

Note: Status is indicated by P, L, NP which is usable password, no password and locked account respectively.

 

Example script(s):

passwd -S -a | grep " L " | cut -d " " -f1
passwd -S -a | awk '/L/{print $1}'

 

Add User to Secondary Group:

RHEL/DEB: usermod -a -G {group} {username}
SLES: usermod -A {group} {username}

 

Expire Password:

passwd -e {username}
chage -d 0 {username}
passwd -f {username}

Torry Crass

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