Home - News ( United States | United Kingdom | Italy | Germany ) - Football scores

Showing content from https://www.geeksforgeeks.org/linux-unix/chpasswd-command-in-linux-with-examples/ below:

chpasswd command in Linux with examples

Last Updated : 15 May, 2019

command is used to change password although

command can also do same. But it changes the password of one user at a time so for multiple users

is used. Below figure shows the use of

command. Using

we are changing the password of the guest user. Here first you have to enter the password of the currently signed user and then you change the password of any other user. One must have administrator privileges.

command reads a number of username and password which are separated by colon using standard input or file, and then encrypt as per the options.

$chpasswd
user1:user1_password
user2:user2_password
user3:user3_password

After completion please press

to exit from the command. As soon as

is pressed password gets changed.

A simple text file can also be used to store username and password and then use them to change the password.

$cat > pass.txt
user1:user1_password
user2:user2_password
user3:user3_password

Then provide this to

command.

$chpasswd < file_name.txt

• -c, --crypt-method Method_Name : This command option is used for the crypt method. The method can be DES, MD5, SHA256, SHA512 or NONE.
• -e, --encrypted : It is used to supply the encrypted passwords.
• -h, --help : Used to display the command options and messages.
• -m, --md5 : It is used to encrypt the clear text password using the MD5 algorithm.
• -s, --sha-no_of_rounds : Here you can give the number of rounds for the SHA crypt algorithm.

The encryption algorithm can also be applied to the password.

$chpasswd -c SHA512
user1:user1_password
user2:user2_password
user3:user3_password

or

$chpasswd --md5
user1:user1_password
user2:user2_password
user3:user3_password

Both are a different type of encryption algorithm

RetroSearch is an open source project built by @garambo | Open a GitHub Issue

Search and Browse the WWW like it's 1997 | Search results from DuckDuckGo

HTML: 3.2 | Encoding: UTF-8 | Version: 0.7.4