RHCSA Ch5 Flashcards
delete user and home directory
userdel -r bob
modify a user
usermod
usermod specify home dir
- d homedir
- m =to move directory
Change user ID
-u 1234
usermod change primary group ID
-g 1234
group must exist first
usermod append to existing settings
-a
usermod change login name
-l name
usermod lock or unlock account
- L
- U
add a new group
groupadd -g 1010 jane
Delete password
passwd -d user
expire password
passwd -e user
Lock password
passwd -l user
Unlock password
passwd -u user
Password Output status
passwd -S user
how do you know if a users password is locked?
The password hash in /etc/shadow will begin with !!
or
sudo passwd -S brian
where are password parameters stored
/etc/security/pwquality.conf
where is the password aging parameters stored
/etc/login.defs
how to change password aging?
chage [option]
- d = last day account is active = -d 0 = will force user to reset password on next login
- E = expire date = sudo chage -E 2025-01-01 brian
- I = inactive days (capital i)
- m = Minimum days until change
- M = Max days valid
- W - warn days
- l = list
add a new goup
sudo groupadd -g 1050 accounting
change a group id number
sudo groupmod -g 1051 accounting
place brian in the the account group
sudo gpasswd -a brian accounting
sudo usermod -a -G accounting brian
-a = append
give a group a password
sudo gpasswd accounting
list what groups you are apart of
groups
change into a group that you do not belong to
newgrp accounting
