passwd command is a Linux utility that allows users to change their own passwords. It is a command-line interface tool that is used to modify the password of a user account on a Linux system. The
passwd command is only available to the root user and users who have been granted permission to use it.
passwd command is used to change the password of the current user or another user on the system. The syntax for the command is as follows:
passwd [options] [username]
username is the name of the user whose password you want to change. If no
username is specified, the password for the current user will be changed.
When you run the
passwd command, you will be prompted to enter the new password twice. The password will not be displayed on the screen as you type it.
Here are some examples of how to use the
To change the password for the current user:
To change the password for a specific user:
To force the user to change their password at the next login:
passwd -e johndoe
To lock a user’s password:
passwd -l johndoe
To unlock a user’s password:
passwd -u johndoe
passwd command has several options that you can use to modify its behavior. Here is a table of the available options:
|-a||This option is used to change the password for all users.|
|-d||This option is used to delete a user’s password.|
|-e||This option is used to force the user to change their password at the next login.|
|-h||This option is used to display the help message for the
|-k||This option is used to set the maximum number of days between password changes.|
|-l||This option is used to lock a user’s password.|
|-S||This option is used to display the status of a user’s password.|
|-u||This option is used to unlock a user’s password.|
Here are some common issues that you may encounter when using the
passwd command and how to troubleshoot them:
- If you receive an error message that says “passwd: Authentication token manipulation error”, it may be because the password file is not writable. Ensure that you have the necessary permissions to modify the password file.
- If you receive an error message that says “passwd: Authentication information cannot be recovered”, it may be because the password file is corrupted. Try restoring the password file from a backup.
- If you are unable to change your password, it may be because the password you are trying to set does not meet the system’s password complexity requirements. Ensure that your password meets the minimum length and complexity requirements.
passwdcommand should be used with caution, as it can potentially allow users to gain unauthorized access to a system if used improperly.
- It is recommended that users change their passwords regularly to ensure the security of their accounts.
passwdcommand is not available on all Linux distributions. Some distributions may use a different command or method for changing passwords.