- A Cloud Guru
Managing User and Group Accounts
The ability to manage user accounts and group membership is a crucial tool in any system administrator's box. In this hands-on lab, we will work with commands like `useradd`, `passwd`, `usermod`, `groupadd`, `groupmod` and `groupdel`. By the time we're done, we will have a good grasp on how to use these tools for managing user accounts and groups on any Linux system.
Table of Contents
Create a tester Group in the Reserved Range
groupaddcommand with the
-roption to create the group
groupadd -r tester
Add the test1 User and Make Them a Member of the tester Group. Lock and unlock the test1 User, and Force them to Change their Password
Use the command
-Goption to spection the
useradd -G tester test1
Set a temporary password (that the user will have to change the first time they log in):
echo Temp@$$ | passwd --stdin test1
We could also set one manually by just running
passwd test1and typing/confirming a password by hand.
Lock and unlock the account using the
usermod -L test1 tail -n1 /etc/passwd /etc/shadow usermod -U test1
We can run
tail -n1 /etc/passwd /etc/shadowto see if it got set.
And to make
test1change their password on the next login, run:
chage -d0 test1
Verify the account and groups using the
Modify cloud_user to Add Secondary Membership in tester Group
usermodcommand with the
-aGoptions to add
usermod -aG tester cloud_user
We can run
id cloud_userto check our work and see if the user is in the group now.
Create the /usr/local/test_scripts Directory Owned by cloud_user and Set GID Permission for the testers Group with No Access to Others
Create the directory:
Make sure it's owned by
cloud_user, and the
chown cloud_user:tester /usr/local/test_scripts
Give the group write permissions, and revoke any permissions from anyone else:
chmod g+ws,o-rx /usr/local/test_scripts
As a best practice, verify your work. Become the new user, get into the new directory, and create a couple things to look at:
su - test1 cd /usr/local/test_scripts mkdir dir1 touch file1 ls -l
What's a lab?
Hands-on Labs are real environments created by industry experts to help you learn. These environments help you gain knowledge and experience, practice without compromising your system, test without risk, destroy without fear, and let you learn from your mistakes. Hands-on Labs: practice your skills before delivering in the real world.