passwd command HowTo - Linux / Unix Q & A from nixCraft

How to change root password in Ubuntu Linux

last updated January 9, 2018 in Linux, Ubuntu Linux

I am a new Ubuntu Linux server admin. How can I change root password in Ubuntu Linux server using the bash shell over ssh based session?

How to force users to use secure passwords on Ubuntu/Debian Linux

last updated August 29, 2016 in Debian / Ubuntu, Linux, Security, User Management

My Linux shell user can modify their password using the passwd command. How can I force users to choose the secure password that will prevent users from using stupid passwords like “abc123”, “password”, “123456” and so on? How do I setup password quality requirements on my Debian or Ubuntu Linux server?

Linux Change Password Using passwd Command Over SSH

last updated January 7, 2018 in Commands, Linux, OpenBSD, UNIX

I‘m a new Ubutnu Linux user. I backup files to our corporate Unix backup server using the rsync command. The server only allow to upload/download files. I am unable to login to the server. How do change my password using the passwd command over ssh based session?

CentOS / RHEL: Set Accounts To Disable After Password Expiration

last updated December 1, 2012 in CentOS, RedHat and Friends

How do I automatically disable user accounts after 30 days after password expiration date under CentOS / Fedora / Red Hat / RHEL / Scientific Linux server operating systems?