Ubuntu Unleashed 2019 Edition: Covering 18.04, 18.10, 19.04

NOTE

Ubuntu  does    not support any graphical   tools   that    enable  you to  configure

disk    quotas. A   Quota   mini-HOWTO  is  maintained  at

http://www.tldp.org/HOWTO/Quota.html.

Related Ubuntu Commands

You use these commands to manage user accounts in Ubuntu:

ac—Provides user    account statistics

change—Sets or  modifies    user    password    expiration  policies

chfn—Creates    or  modifies    user    finger  information in  /etc/passwd

chgrp—Modifies  group   memberships

chmod—Changes   file    permissions

chown—Changes   file    ownerships

chpasswd—Modifies   user    passwords   in  batches

chsh—Modifies   a   user’s  shell

groups—Displays existing    group   memberships

logname—Displays    a   user’s  login   name

newusers—Batches    user    management  command

passwd—Creates  or  modifies    user    passwords

su—Executes a   shell   or  command as  another user

sudo—Manages    selected    user    execution   permissions

useradd—Creates,    modifies,   or  manages users

usermod—Edits   a   user’s  login   profile

References

http://tldp.org/HOWTO/User-Authentication-HOWTO/—A

HOWTO   that    describes   how user    and group   information is  stored  and

used    for authentication

http://tldp.org/HOWTO/Shadow-Password-HOWTO.html—A

HOWTO   that    delves  into    the murky   depths  of  shadow  passwords   and