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

Add a new user account with admin access on Linux

last updated January 17, 2020 in CentOS, Debian / Ubuntu, Linux, RedHat and Friends, User Management

How do I add a user account with admin (sudo) access on Ubuntu or CentOS Linux cloud server? How can I add a new user with admin account level access in Linux?

How to change root password on macOS Unix using terminal

last updated December 20, 2018 in Mac OS X, UNIX, User Management

I am a new user of macOS Unix running on MacBook Pro and Mac mini server. I need to change the password for root user account on macOS. How do I change the root password on macOS Unix using command line options?

How to change root password on Fedora Linux

last updated December 19, 2018 in Fedora Linux, Linux, User Management

I am a new user of Fedora Linux version 28/29 servers. I need to change the password for root user account on Fedora Linux server. How do I change the root password on Fedora Linux using command line options?

How to change root password on RHEL ( Red Hat Enterprise Linux)

last updated December 19, 2018 in Linux, RedHat and Friends, User Management

I am a new user of Red Hat Enterprise Linux servers. I need to change the password for root user account. How do I change the root password on RHEL ( Red Hat Enterprise Linux) using command line options?

How to change root password in Ubuntu Linux

last updated December 2, 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 change root password on CentOS Linux

last updated December 19, 2018 in CentOS, Linux, User Management

I am a new user of CentOS Linux servers. I need to change the password for root user account on CentOS Linux. How do I change the root password on CentOS Linux using command line options?

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?