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

How to create a new sudo user on Ubuntu Linux server

last updated January 23, 2017 in Linux, Ubuntu Linux, User Management

I am a new Ubuntu Linux 16.04.xx LTS server user. How do I create a new sudo user on my server? How do I add a new user as sudoer file using the command line option on Ubuntu?

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?

Ubuntu Linux: Add a User To Group

last updated June 10, 2013 in Ubuntu Linux

How do I add a user to group under Ubuntu Linux operating system using command line options?

Ubuntu Linux: Add a User To Group www-data ( Apache Group )

last updated May 6, 2012 in Apache, Ubuntu Linux

How do I a user to the Apache group called www-data under Ubuntu or Debian Linux server operating systems?

HowTO: Linux Disable a User Account Command

last updated December 1, 2012 in Linux

How do I disable a user account under Linux operating systems? How can I completely disable a user account Linux server?

Ubuntu: Rename an Account [ User ID ]

last updated December 6, 2010 in Ubuntu Linux

How do I rename a user name from ‘tom’ to ‘jerry’ under Ubuntu Linux?

Linux / UNIX: Restrict Access To A Given Command

last updated October 3, 2009 in BASH Shell, CentOS, Debian / Ubuntu, Fedora Linux, FreeBSD, HP-UX Unix, Linux, RedHat and Friends, Solaris-Unix, Suse, Ubuntu Linux, UNIX, User Management

How do I restrict access to a given command for instance /opt/apps/start, to authorized users only under Linux / UNIX / BSD operating system?