How to change root password on Fedora Linux

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

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

NOTE: Please note that [vivek@fedora-linux29:~ ]$ is my shell prompt. You need to type commands after the $ prompt.

Fedora Linux change root password command

I am going to log in to my Fedora Linux 27.x/28.x/29.x server using the ssh command:
ssh vivek@fedora-linux29
Once logged in enter the command passwd as follows:
[vivek@fedora-linux29:~ ]$ 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:

Slightly different procedure for changing passwords in Fedora Linux

One can use the following procedure too:
[vivek@fedora-linux29:~ ]$ ssh user@your-centos-server-name-ip
Become a root user via the su command or sudo command:
[vivek@fedora-linux29:~ ]$ sudo -i
OR
[vivek@fedora-linux29:~ ]$ su -
Finally change your root user password:
passwd

How do I change password for other users?

The syntax is:
sudo passwd userNameHere
sudo passwd vivek

How do I change my own password?

Simply type:
passwd

Conclusion

This page explained the process for changing the password of root user using the passwd command on a Fedora Linux. For more info see passwd command manual page by typing the following man command:
man passwd
OR
passwd --help
Sample help page from Fedora Linux box:

Usage: passwd [OPTION...] <accountName>
  -k, --keep-tokens       keep non-expired authentication tokens
  -d, --delete            delete the password for the named account (root only); also removes password lock if any
  -l, --lock              lock the password for the named account (root only)
  -u, --unlock            unlock the password for the named account (root only)
  -e, --expire            expire the password for the named account (root only)
  -f, --force             force operation
  -x, --maximum=DAYS      maximum password lifetime (root only)
  -n, --minimum=DAYS      minimum password lifetime (root only)
  -w, --warning=DAYS      number of days warning users receives before password expiration (root only)
  -i, --inactive=DAYS     number of days after password expiration when an account becomes disabled (root only)
  -S, --status            report password status on the named account (root only)
      --stdin             read new tokens from stdin (root only)
 
Help options:
  -?, --help              Show this help message
      --usage             Display brief usage message