How to change root password on Alpine Linux

I am a new user of Alpine Linux and running on LXD server. I need to change the password for root user account on Alpine Linux. How do I change the root password on Alpine Linux using command line options?

Introduction – You need to use the passwd command. It is used to update the user’s authentication token(s) i.e. password. Let us see how to change the root user password on Alpine Linux.

How to change change root password on Alpine Linux

The procedure for changing the password of root is as follows:

  1. First, log in to the Alpine Linux server using ssh or console or lxc command
  2. Open a shell prompt and type the passwd command to change root password in Alpine Linux
  3. The actual command to change the password for root on Alpine Linux is sudo passwd root

NOTE: Please note that [email protected]:~ $ is my shell prompt. You need to type commands after the $ prompt.

Alpine Linux change root password command

I am going to log in to my Alpine Linux 3.x server/VM/container using the ssh command:
[email protected]_nixcraft:~ $ ssh [email protected]
Once logged in enter the command passwd as follows:
[email protected]:~ $ sudo passwd root
First you need to type the password for vivek user. After that the passwd command asks for the new password, which you will have to enter two times:

Changing root account passwords on an Alpine Linux based server/vm/container

The next time you log in to a Alpine Linux server/workstation, use the new password.

Slightly different procedure for changing passwords in Alpine Linux

One can use the following procedure too:
[email protected]:~ $ ssh [email protected]
Become a root user via the su command or sudo command:
[email protected]:~ $ sudo -i
OR
[email protected]:~ $ su -
Finally change your root user password:
passwd

Conclusion

This page explained the process for changing the password of root user using the passwd command on a Alpine Linux. For more info type the following man command on Alpine:
man passwd
OR
passwd --help
Sample outputs:

BusyBox v1.28.4 (2018-12-06 15:13:21 UTC) multi-call binary.
 
Usage: passwd [OPTIONS] [USER]
 
Change USER's password (default: current user)
 
	-a ALG	des,md5,sha256/512 (default sha512)
	-d	Set password to ''
	-l	Lock (disable) account
	-u	Unlock (enable) account