For security reasons, your ssh based account has limited access to the server. You can only upload or download files using scp, sftp, rsync and so on. You may execute limited number of commands such as passwd, ls and so on.
Also, it is a good idea to change your password every month or at least every four months. Make sure you use combination of alphabets (upper and lower case characters), numbers, and special characters as a password to safeguard your account. You should choose a password of at least ten characters.
Changing the password for Linux or Unix over ssh
The procedure to change the user password on Linux or Unix over ssh:
Open the Terminal application
Type the following command to change password for vivek user using ssh: ssh -t vivek@IP-here passwd
Type the following command to change password for root user using ssh: ssh -t root@server-IP-here passwd
Type your current password when prompted. You must type new password twice
The author is the creator of nixCraft and a seasoned sysadmin, DevOps engineer, and a trainer for the Linux operating system/Unix shell scripting. Get the latest tutorials on SysAdmin, Linux/Unix and open source topics via RSS/XML feed or weekly email newsletter.