User password expiration

Like in AIX, on Linux it is important to control the users passwords expiration.  The password expiration information is stored in /etc/shadow.

Inspect the password expiration from one user:

# chage -l simpleuser

Minimum:        0
Maximum:        90
Warning:        7
Inactive:       -1
Last Change:            Feb 19, 2009
Password Expires:       May 20, 2009
Password Inactive:      Never
Account Expires:        Never

Inspect the password expiration from all the users:

for i in `cat /etc/passwd | awk -F: '{print $1}'`; do echo "UserName:${i}"; chage -l $i|grep "Password Expires" ;done

Disable the password expiration from one user:

# chage -I -1 -m 0 -M 99999 -E -1 simpleuser