Show/Hide Answer
2. What is the default permission on user's home directory?
Show/Hide Answer
3. What is the difference between .bash_profile and .bashrc?
Show/Hide Answer
4. What is the command to create a user with a pre defined uid, shell and home directory?
Show/Hide Answer
5. Explain each field of /etc/passwd
Show/Hide Answer
6. How to change primary group for any user?
Show/Hide Answer
7. If I delete a user, does it's home directory gets deleted? If not then what is the command to delete the home directory of user along with the user
Show/Hide Answer
8. Name any 3 files which are automatically created inside any user's home directory when a user is added
Show/Hide Answer
9. What is the command to view all the currently logged in users?
Show/Hide Answer
10. What is the command to change and view the expiry date for any user?
Show/Hide Answer
11. What are the details you get with finger command?
Show/Hide Answer
12. How can you give a normal user all the root level privileges?
Show/Hide Answer
13. Name any 3 groups of which root is a member by default
Show/Hide Answer
14. How can you give sudo access to any user without asking him to provide passord every time he runs a command?
Show/Hide Answer
15. Why do we use visudo rather than editing the file with vi or any other editor?
Show/Hide Answer
https://www.golinuxcloud.com/category/interview-questions/
Thanks for the nice post, post some tricky user admin interview questions if you have.
Default umask for the Root is 0022 hence file - 644 and dir - 755 whereas default umask for non-root user is 0002 hence file- 664 and dir -775 permissions.
Default Umask of Root is 0022 hence file - 644 and dir - 755 whereas default umask for non-root is 0002 hence file - 664 and dir - 775 .
Very nice.info
very thank full
Suggestion :-
How to lock & unlock a user
Can 2 user have same uid & gid
Hi Shubham
you can lock and unlock if you had two users have with same uid and gid also by using below commands .
ex: i have two users test and test1
usermod -L test -->it will lock to test user
usermod -L test1 --> it will lock to test1 user
u can verify in /etc/shadow file
cat /etc/shadow |grep -i test
cat /etc/shadow |grep -i test1
o/p : u can observer below 2 lines after test: ! is there its indicates user is currently locked.
test:!$6$mC7ZaS/G$4qD3TYhqujmS628mlYG1XcL3TxYYiWBeCMs9TM/.EfJ31RzedqOMQ0SCk3A3NPM7/rmHvNRdU5KmIkWwlZ96J1:17347:0:99999:7:::
test1:!$6$2Z1S8yPW$dnLx0qwxBQOI9c9vjzJsD2IxXB7s2zuy3u4RhrJwjPWMCf7.rHIRBjZ9JgmsLx/VyPs3Rb7zKTQZoAHpoBgAO0:17347::::::
i need step by step process of truobleshooting user login issues when user unable to login??
I have written this article to understand login process
golinuxhub.com/2014/09/how-does-successful-or-failed-login.html
but to troubleshoot login issues there are various things which can be done
Like execute ssh with verbose and check the stage where it fails
monitor the client node's sshd logs and see the error message you get (this will give you the best hint)
Disable firewall on server and client side and see if that is the problem
Minimize sshd hardening if any of your recent sshd hardening changes led to the problem
check password of the usr, if it is blocked
and many more..
nice