how to Add,delete,modify user in ubuntu

A command to list all users? And how to add, delete, modify users?

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	I need a command to list all users in terminal. And how to add, delete, modify users from terminal. That could help in administrating your accounts easily by terminal.

Answers:

To list all users you can use: cut -d: -f1 /etc/passwd To add a new user you can use: sudo adduser new_username or: sudo useradd new_username See also: What is the difference between adduser and useradd? ............................................................................................................... To remove/delete a user, first you can use: sudo userdel username Then you may want to delete the home directory for the deleted user account : sudo rm -r /home/username (Please use with caution the above command!) To modify the username of a user: usermod -l new_username old_username To change the password for a user: sudo passwd username To change the shell for a user: sudo chsh username To change the details for a user (for example real name): sudo chfn username And, of course, see also: man adduser, man useradd, man userdel... and so on.

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	Just press Ctrl+Alt+T on your keyboard to open Terminal. When it opens, run the command(s) below: cat /etc/passwd OR less /etc/passwd more /etc/passwd You can also use awk: awk -F':' '{ print $1}' /etc/passwd .............................................................................................................
	To get a list of all users you type (as users are listed in /etc/passwd) getent passwd To add a user newuser to the system you would type sudo adduser newuser to create a user that has all default settings applied. Bonus: To add any user (for instance anyuser) to a group (for instance cdrom) type sudo adduser anyuser cdrom You delete a user (for instance obsolete) with sudo deluser obsolete If you want to delete his home directory/mails as well you type sudo deluser --remove-home obsolete And sudo deluser --remove-all-files obsolete will remove the user and all files owned by this user on the whole system.

		user (tab tab) gives me as possible options useradd userdel usermod users users-admin if you want to know more about a command google it or type man man useradd gives useradd - create a new user or update default new user information ... ... to list users you should go with what Mitch said. Hope that helps I love tab completion in bash saves me from remembering things. --------------------------------------------------------------------------------------------------------
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	list of all users who can login (no system users like: bin,deamon,mail,sys, etc.) awk -F':' '$2 ~ "\$" {print $1}' /etc/shadow add new user sudo adduser new_username  or  sudo useradd new_username delete/remove username sudo userdel username If you want to delete the home directory (default the directory /home/username) sudo deluser --remove-home username or sudo rm -r /path/to/user_home_dir If you want to delete all files from the system from this user (not only is the home diretory) sudo deluser --remove-all-files To find out the users on the server, run the following commands cd /home ls You can then see the users who have authorization to log into the server. If we want to look into the files of any users, you must be the root user.