Linux Technical Interview QA with Practical Sessions

Udemy

Price: USD 1,600

LINUX Basic Course Outline

Here are topic wise Linux System Administrator Interview Questions

Interview Questions on topic User Administration in Linux

LINUX Basic Course Outline

Here are topic wise Linux System Administrator Interview Questions

Interview Questions on topic User Administration in Linux

What the fields of /etc/passwd file?
How to create a user with specifying a primary/Secondary grp?
How can you create a user without useradd command?
What is the default permission on user's home directory?
What is the difference between .bash_profile and .bashrc?
What is the command to create a user with a pre defined uid, shell and home directory?
How to change primary group for any user?
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
Name any 3 files which are automatically created inside any user's home directory when a user is added.
What is the command to view all the currently logged in users?
What is the command to change and view the expiry date for any user?
What are the details you get with finger command?
How can you give a normal user all the root level privileges?
Name any 3 groups of which root is a member by default
How can you give sudo access to any user without asking him to provide passord every time he runs a command?
Why should I use visudo command instead of directly editing the file with vi or any other editor?
Default permission of file and Directory ?
How to view the User's login and logout details ?
How to check Primary and Secondary Group of One User ?
How to lock & unlock the User Account ?

Interview Questions on topic permissions in Linux

What is the difference between SUID and SGID?
What is Sticky Bit permission?
What is umask?
What is the default umask value for useradd command and where is it defined?
Will you be able to cd into a directory with only read permission?
What is -R argument used for along with chmod command?
How can you restrict a normal as well as root user from making any changes as well as deleting any file?
What is the difference between small t and capital T when applying sticky bit permission?
List out few of the differences between Softlink and Hardlink?
What is the difference between umask and ulimit ?

Interview Questions on topic LVM in LINUX

Interview Questions on topic Linux Boot Process

Explain booting process ?
Define BIOS, MBR?
Explain GRUB and how it differs from latest GRUB2?
How would you define initramfs and what is its function in the Linux booting process?
What is the one new feature of RHEL 7?
What is systemd? And tell few features of systemd which makes it differs from other OS.
Overview of Systemd in RHEL 7?
List few features of Systemd? And tell few features of systemd which makes it differs from other OS.
Booting process of RHEL 7?
When it is required to boot the Linux box in to rescue mode and how we can boot it on rescue mode?
What is the command to change the runlevel in RHEL 7? and also to view what targets are available you can issue the list-units option with the type target?
Rescue mode in RHEL7 & how can we boot into Rescue mode?
What is basic difference between Rescue & Emergency Mode?
How can we recover MBR if it gets corrupted?
Suppose someone accidently deleted the mount binary i.e. (/bin/mount) and rebooted the Linux Box, then how would recover your box from this situation?

Interview Questions on topic SSH in LINUX

What is the default port & configuration file of SSH Server ?
How to change the default ssh port in linux ?
What is the configuration file of ssh client ?
How to disable the root login in linux server ?
How to allow only specific users to ssh your linux server ?
How to enable debugging in ssh command ?
What is the difference between ssh & Telnet ?
What is use of sshpass command in linux ?
What is the use of scp command ?
What is the use of blowfish options in scp command ?
How to limit the bandwidth used by scp command ?
How to enable passwordless ssh authentication in Linux ?
How to check SSH servers Version ?
How to Copy the file server.txt from the local machine to a remote host using port 2751 in /opt folder.

Technical Interview QA on Process Management