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Linux turn OFF password expiration / Aging

Linux turn OFF password expiration / Aging

/etc/shadow stores actual password in encrypted format for user’s account with additional properties related to user password.

The password expiration information for a user is contained in the last 6 fields. Password expiration for a select user can be disabled by editing the /etc/shadow file. However I recommend using chage command. The chage command changes the number of days between password changes and the date of the last password change. This information is used by the system to determine when a user must change his/her password.


To list current aging type chage command as follows:
# chage -l avinash
Output:
Last password change : May 22, 2007
Password expires : never
Password inactive : never
Account expires : never
Minimum number of days between password change : 0
Maximum number of days between password change : 99999
Number of days of warning before password expires : 7

To disable password aging / expiration for user foo, type command as follows and set:Minimum Password Age to 0Maximum Password Age to 99999Password Inactive to -1A ccount Expiration Date to -1
Interactive mode command:# chage username
OR
# chage -I -1 -m 0 -M 99999 -E -1 username


Thanks & Regards

Avinash Pillai


Email: avinashp25[AT]gmail[DOT]com
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