Showing posts with label Crack Linux Interview. Show all posts
Showing posts with label Crack Linux Interview. Show all posts

Linux admin Interview Questions

Linux admin Interview Questions

1.What is difference between Hard Link and Soft Link?
ANS: In Hard Link a new hard link is created to reference the same file. Means new file is created which point to the same reference file. And in Soft Link a link is created like as a shortcut. 

2.Can we change port number of ssh. If yes, then to how?
ANS: Yes, we can change port number of ssh. Default port number of ssh is 22. To change port number of ssh from 22 to 2222 there have a need to configure following file.
vim /etc/ssh/sshd_config
In above file search the line that specifies the port number. Remove # sign before that line. Insert number 2222 with replace to 22. Then reload the firewall and restart the sshd service.

3.What is default permission of file and directory?
ANS: File default permission is 664
          Directory default permission is 775

4.What is difference between YUM and RPM?
ANS: YUM is a Yellowdog Update Manager which is used to resolve dependencies.
 RPM does not resolve dependencies.

5.What is LVM? Why LVM is used?
ANS: Learn LVM in more details

6.What is difference between ps and Top command.
ANS: Both Top and ps commands are used to see status of processes. Top command shows dynamic view of systems processes. In Top command processes continuously refreshes at a configurable interval. ps command shows static view of processes, which are not refreshes at a interval.
 

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