User management

Users

# useradd -c "John Doe" -m john

# usermod -a -G wheel john

# passwd john

# id john

# userdel -r john

Groups

# groupadd -g 1001 mygroup

# groupdel mygroup

# gpasswd -r mygroup

# newgrp - mygroup

# gpasswd -r mygroup

Password policies

# chage -d 0 -I -1 -m 0 -M 99999 -W -1 john

Verification

# grpck -r

# pwck -r
user 'pulse': directory '/var/run/pulse' does not exist
user 'rpc': directory '/var/lib/rpcbind' does not exist
user 'sshd': directory '/var/empty/sshd' does not exist
user 'firebird': program '/bin/nologin' does not exist
pwck: no changes