chpasswd Command - Update Passwords in Batch

The chpasswd command is used to update passwords in batch mode. It reads a list of username:password pairs from standard input and updates the passwords for those users.

Syntax

chpasswd [options]

Examples

echo "user1:newpass" | chpasswd

echo -e "user1:newpass\nuser2:otherpass" | chpasswd

Notes

• chpasswd is typically used by system administrators for batch password updates.
• Requires root privileges to run.
• For interactive password changes, use passwd.