passwd Command--linux command application of large dictionary 729 commands interpretation

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passwd command

use the passwd command to set or modify the user's password, ordinary users and super-privileged users can run passwd, ordinary users can only change their user password,root Users can set or modify the password for any user. If the passwd command is not followed by any option or user name, the current user's password is modified.

Command syntax:

passwd [ options ] [ user name ]

The meanings of the options in the command are as shown in the table.

table passwd command options meaning

Options	Meaning
-D	Delete user password, can only be operated as root user
-L	Lock the password of the user account
-U	Unlock password for user account
-X < days >	Maximum effective time limit for passwords
-N < days >	Minimum effective time limit for passwords
-W < days >	Start reminding users how many days before the password expires
-I < days >	How many days after the password expires the account will be disabled
-S	Querying the user's password status
-F	Enforcement action

Example: Set the user 's it password.

[Email protected] ~]# passwd it

change The password for the user's it .

the new Password: // Enter the user 's it password here

re-enter the new Password: // re-enter the user 's it password here

passwd: All the authentication tokens have been successfully updated.

Example: Lock the user 's it password.

[Email protected] ~]# Passwd-l it

lock The user 's it password .

passwd: Successful Operation

users cannot log on to the system after it has been locked, but can use the su command to switch from other users to the user it

Example: View the user 's it password status.

[Email protected] ~]# Passwd-s it

It LK 2013-08-18 0 99999 7-1 ( password has been locked.) )

View user password status, show user it 's password is locked

Example: Unlocking the user 's it password.

[Email protected] ~]# Passwd-u it

unlock the user 's it password .

passwd: Successful Operation

User it has been successfully unlocked, reset with password to unlock user

Example: Delete the user 's it password.

[Email protected] ~]# passwd-d it

clears the user's password for it.

passwd: Successful Operation

passwd Command--linux command application of large dictionary 729 commands interpretation