Linux Technical Interview QA with Practical Sessions

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About This Course

Learn Interview tips from IT professionals with live Environment Sessions.

                            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

  • How many volume groups can be created in Linux ?

  • Is it possible to increase the logical volume on fly ?

  • How to reduce the logical volume ? is it possible to reduce on fly ?

  • How to increase the logical volume?

  • How to do you scan the new LUN or disk for LVM  physical volume ?

  • How to scan disks for existing volume group ?

  • How to scan a logical volume from existing volume group?

  • How to stop the logical volume ? or deactivate the logical volume ?

  • How to activated the logical volume which in deactivated state ?

  • How to disable the volume group ? or Deactivate the volume group ?

  • How to enable the volume group ? or Activate the volume group ?

  • How do you find that what are the disks are used for  logical volume mirroring ?

  • How to list the imported volume groups ?

  • How to list the available logical volumes on the system?

  • How to list the available physical volumes in LVM?

  • How to see the detailed volume group information ?

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 server’s 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

  • What is a prcoess and whats the command to list all the process?

  • How to use custom properties while running a ps command?

  • What is PID & PPID ? Example with an example?

  • What is a nice value & how can we set it for a process?

  • What is 'D Uninterruptible sleep mode?

  • What is Z and paging Stat process stats?



  • LINUX Technical Interview QA’s with Practical way of explanation

  • Interview Questions on topic User Administration in Linux

  • Interview Questions on topic Permissions Administration in Linux

Instructor

Profile photo of Shikhar Verma • 90k+ Students Worldwide
Shikhar Verma • 90k+ Students Worldwide

Shikhar Verma, an entrepreneur and corporate trainer, runs the IT company Techstart, which deals with IT-based projects like designing, creating certified courses, writing content, and handling and maintaining various offline/online projects for well-known companies.He had already worked for more than 15 years in the IT industry before starting his own business.Shikhar's passion is to work in an environment where his...

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4.9 course rating
4K ratings
ui-avatar of Bharath Kumar
Bharath K.
3.5
1 year ago

good

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ui-avatar of Gauri Sankar Padhy
Gauri S. P.
5.0
1 year ago

good

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ui-avatar of Pranit_28
Pranit_28
5.0
1 year ago

instructor teaching very awesome and practical way in all topics. I highly recommend to everyone.

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ui-avatar of Harish BS
Harish B.
3.0
2 years ago

It's an awesome video. But if you think that you can clear interview with this. Your wrong. Whatever he has cleared is good. But still, he needs to add lots of questions and answers.

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ui-avatar of Ahamed Siddique
Ahamed S.
5.0
2 years ago

Good

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ui-avatar of Mayur Suresh Patil
Mayur S. P.
4.5
3 years ago

Yes

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ui-avatar of Ben Gyan
Ben G.
5.0
3 years ago

Great

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ui-avatar of Avinash S Kumar
Avinash S. K.
3.0
4 years ago

Kindly update your course Sir...

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ui-avatar of Vinod
Vinod
4.0
4 years ago

good and informative to prepare for interview

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ui-avatar of Laxmi Vishwakarma
Laxmi V.
4.5
5 years ago

Good Explanations with examples.

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