Linux passwd command

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The Linux passwd command is used to change the user's password

Syntax

passwd [-k] [-l] [-u [-f]] [-d] [-S] [username]

Required Parameters:

• -d Delete Password
• -f Force User to Change Password on Next Login
• -w Number of Days to Warn Before Password Expiry
• -k Update Only Messages Sent After Expiry
• -l Disable Account Use
• -S Display Password Information
• -u Enable the Disabled Accounts
• -x Specify the Maximum Lifetime of the Password
• -g Modify Group Password
• Specify the Minimum Lifetime of the Password
• -i How many days to disable the account after password expiry

Select Parameters:

• --help Display Help Information
• --version Display Version Information

Online Examples

Modify User Password

# passwd w3codebox  //Set w3Password for codebox user
Enter new UNIX password:  //Enter new UNIX password: No echo on input
Retype new UNIX password:  //Confirm Password
passwd: password updated successfully
# 

Display Account Password Information

# passwd -S w3codebox
w3codebox P 05/13/2010 0 99999 7 -1

Delete User Password

# passwd -d lx138 
passwd: password expiry information changed.

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