Top 25 UNIX commands Interview Questions and Answers for Software Testing professionals

Here you will learn Top 25 UNIX commands interview questions and answers asked to software testers.
1. How to get the current directory?
2. How to create a new directory?
3. How to change or navigate to a particular directory ?
4. How to Navigate to HOME directory ?
5. How to move to one level up or directory up ?
6. How to create a new file ?
7. How to display the file content ?
8. How to join two files (file1, file2) and stores the output in a new file (file3) ?
9. How to Rename a file ?
10. How to Lists all files and directories ?
11. How to list files in sub-directories ?
12. How to list hidden files ?
13. How to delete a file ?
14. How to remove directory with files?
15. How to copy a file from one location to a new location ?
16. How to copy contents of a folder ?
17. How do you find out all processes that are currently running?
18. How do you kill a process ?
19. What would you use to view contents of a large error log file ?
20. How do you log in to a remote Unix box ?
21. How do you start a job on background ?
22. How do you know if a remote host is alive or not?
23. How do you copy a file from one server to your local system?
24. How to search a word inside a file ?
25. What is “chmod” command ?
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[@anip0486]

Awesome list!. Thanks very much. Added timestamps to the questions.. 0:36 How to get the current directory? 1:46 How to create a new directory? 3:06 How to change or navigate to a particular directory? 4:27 How to change or navigate to HOME directory? 5:47 How to move to one level up or directory up? 6:36 How to create a new file? 9:24 How to display the file content? 10:15 How to join two files(file1, file 2) and store the output in new file (file3)? 11:35 How to rename a file? 12:34 How to list all files and directories? 13:09 How to list all files in sub-directories? 15:38 How to list hidden files? 16:42 How to delete a file? 17:34 How to remove directory with files? 18:40 How to copy a file from one location to a new location? 21:50 How to copy contents of a folder? 23:21 How do you find out all processes that are currently running? 23:56 How do you kill a process? 25:04 What would you use to view contents of a large error log file? 26:18 How do you log into a remote Unix box? 26:53 How do you start a job in background? 27:32 How do you know if a remote host is alive or not? 28:21 How do you copy a file from one server to your local system? 29:37 How to search a word inside a file? 30:10 What is "chmod" command?

[@SoftwareTestingAndAutomation]

Thank you 😊

[@vishalmeerut0508]

really helpful…you have shown the commands with practical…thanks

[@davidchifunga5735]

This is amazing! I think I found the solutions to the tasking questions I was given as a fresher. It's so benefitial for me.

[@SoftwareTestingAndAutomation]

Thank you!!! Keep learning new things😊

[@happykillfreak]

I like the way that you are actually demonstrating the answer for the questions.

[@SoftwareTestingAndAutomation]

Thank you !! Keep learning and sharing with your friends 😊

[@baan1221]

thank you so much. was very helpful, to the point and very helpful.

[@SoftwareTestingAndAutomation]

Welcome 😊 Great to hear that!

[@kumard7333]

First of all Thank you for your video. Awesome. I am beginner the Unix. I learnt quickly and ver easy understanding. And you voice slowly super. I liked you video. Then continue. Thank you.

[@SoftwareTestingAndAutomation]

Thank you !!!Keep learning new things 😊

[@sanjayjangid2168]

Very useful and easy to understand the UNIX commands. A great thanks.

[@SoftwareTestingAndAutomation]

Glad it was helpful!

[@sunitham6556]

Clear explanation, Thank you so much.

[@SoftwareTestingAndAutomation]

Glad to hear that!! Keep learning and sharing with your friends 😊

[@indranilgoswami1500]

Very Informative video. Thanks sir.

[@10kchennal9]

#Super session.... I refer backed my subject.... Good session. Thank you!!!!

[@SoftwareTestingAndAutomation]

I am glad you liked it!

[@jaxon80]

Best overview video for a refresher I found, thanks!

[@SoftwareTestingAndAutomation]

Glad you enjoyed it!

[@smrutiranjanpatra7186]

Very useful. Thanks for sharing.

[@SoftwareTestingAndAutomation]

I am glad it was helpful! Keep learning and sharing with your friends 😊

[@jaywantingle9405]

Very informative and imp commands..Thanks for such a great video

[@SoftwareTestingAndAutomation]

You are welcome. Keep learning and sharing with your friends 😊

[@l.poongodi5554]

Thanks for your valuable information brother 🤝

[@SoftwareTestingAndAutomation]

Glad to hear that!! Keep learning and sharing with your friends 😊

[@niranjanadevis.k6228]

Very useful for beginners thank you

[@SoftwareTestingAndAutomation]

Welcome 😊 Keep learning new things 😊

[@dattatrayarathi1014]

Thank you so much Sir for sharing interview questions on Unix. If possible also kindly share some toughest questions on Unix for experienced

[@happylife_with_parul2310]

Thank you for the explanation

[@SoftwareTestingAndAutomation]

You are welcome! 😊

[@jsp156]

Very useful for freshers 👍

[@SoftwareTestingAndAutomation]

Thank You :-)

[@karthicklakshmanan1807]

It is very helpful and easily understand for beginner's. That for your video

[@SoftwareTestingAndAutomation]

Glad to hear that !! Thank you :-)

[@gauravgaikwad4472]

very helpful video Thank you..

[@SoftwareTestingAndAutomation]

Glad it was helpful!

[@shubhamshiraskar8889]

Thanks its really helpful

[@shivtejmuthyala6254]

very useful, thank you so much sir

[@SoftwareTestingAndAutomation]

Welcome, I am glad it was helpful 😊

[@abhishekduggal6831]

Thank you sir.😊.... provide more videos please. You are a good teacher.

[@SoftwareTestingAndAutomation]

You are welcome. Videos are coming regularly, keep learning :-)

[@kushagra173]

Very informative video , thanks

[@SoftwareTestingAndAutomation]

You are welcome!!! keep sharing with your friends 🙂

[@dheerajvarthi4657]

Thank you very much

[@darshanvyas8620]

Very nicely explained👌🙏🙏🙏🙏

[@SoftwareTestingAndAutomation]

Thank you. keep learning new things :-)

[@rahul1990a]

Thanks for this valuable video

[@SoftwareTestingAndAutomation]

Most welcome!!Keep learning and sharing with your friends 😊

[@anamika2866]

The video is great, but I believe it lack some information, like you could've explained the purpose of all options that you're using with commands. For example, "ls -ltr" here you're using 3 options, so what is the exact purpose of l, t, and r separately and similarly for other commands also.

[@ankushgaurkhede6632]

thanku you so much for telling those imp cmd of linux

[@SoftwareTestingAndAutomation]

It's my pleasure

[@jyotipatil486]

Thank you so much sir. This is helpful to me

[@SoftwareTestingAndAutomation]

You are most welcome !! Keep learning and sharing with your friends 😊

[@jyotipatil486]

Yes sir , thank you

[@gadderevathi]

Your way of explanation is super

[@SoftwareTestingAndAutomation]

Thank you :-)

[@anamika2866]

In ques 16, for me it is copying the entire directory inside other directory and not just its content.. is there any other way to do so?

[@atchutharaojami3109]

It is very useful to me tq dear 🙏🙏🙏

[@SoftwareTestingAndAutomation]

Welcome 😊

[@priteshkhambekar]

Nice content Just one question as an Automation developer where we could use UNIX command?

[@suryatanyarout3551]

Very useful 👍

[@SoftwareTestingAndAutomation]

Thank you

[@Sanjay-gz2wj]

Thank you Sir.. 🙏

[@SoftwareTestingAndAutomation]

Most welcome :-)

[@kaithidilli7579]

Very good useful for me

[@SoftwareTestingAndAutomation]

Glad to hear that :-)

[@anandakumar4510]

Thank you so much bro

[@SoftwareTestingAndAutomation]

Welcome!! Keep learning and sharing with your friends 😊

[@nishantnishu5970]

For question 14th- the question was how to remove a directory with files but you mentioned rm -rf command which is used to remove folder. Is folder and directory the same thing here?

[@SoftwareTestingAndAutomation]

yes folder and directory are the same thing here.

[@Deep.sleep_dream]

Very useful🥰. Keep sharing

[@SoftwareTestingAndAutomation]

Thank you, I will

[@ravikumar-gc4cz]

Tq sir it's useful for my interviews

[@SoftwareTestingAndAutomation]

Glad to hear that!! Keep learning and sharing with your friends 😊

[@SHIVAMKUMAR-qh8yo]

We need more videos like this, will share to all my friends

[@SoftwareTestingAndAutomation]

Thank you 😊 sure I will continue that👍

[@puneettiwari2251]

Excellent sir👍👍

[@SoftwareTestingAndAutomation]

Thank you!!! Keep learning new things :-)

[@rutikabudar359]

thanku sir, very help full. please provide some new advance commands

[@SoftwareTestingAndAutomation]

Glad yo hear. It will come soon.

[@rameshjay758]

Thank you

[@SoftwareTestingAndAutomation]

You are welcome!!! keep sharing with your friends 🙂

[@misty1162]

Discuss some questions for awk,sed,head and tail ps command

[@lightyagami-rk2my]

Thank you sir

[@SoftwareTestingAndAutomation]

Welcome. Keep sharing with your friends 😊

[@eyesenberg1349]

What is the ls option that prints the author of a file please ?

[@roseandmose]

I like the way you say OKAY?

[@SoftwareTestingAndAutomation]

😊

[@rangareddy3598]

Superb......

[@SoftwareTestingAndAutomation]

Thank you! Cheers!

[@musclemaniac1944]

Thank you so much for sharing your knowledge with us. Just a small suggestion, please don't use Red background for your future videos.

[@SoftwareTestingAndAutomation]

Thank you for the honest feedback 😊 I have changed the background in my new videos.

[@chinnajanu7261]

Thank you for this video... & are you having any telegram channel

[@SoftwareTestingAndAutomation]

Thank you :-) No not yet.

[@SantoshYadav-hj8kv]

I cant understand the 18th question. What is pid you are refeering to ?

[@prachianillotake6573]

hello sir very vey thankful to u sir...I mean all your videos are apt and to the point....Sir i wanted to ask a question...is this video ok for 2 years of exp person who is trying to move to Unix testing....hoping for a reply from u....🙂

[@SoftwareTestingAndAutomation]

Thank you. These are basic commands and good for 1-4 Yr experience candidates. But you can always learn more and be prepared for advanced level questions.

[@selvaganesha5128]

thank you sir ...if any chance we need xtra clarification about 18-25 questions... if possible to put new vdo then pls do it sir .. thanks..❤️

[@SoftwareTestingAndAutomation]

Sure I will do that, please let me know your queries.

[@selvaganesha5128]

@@SoftwareTestingAndAutomationSir, we need practical explain like other questions..

[@sagardawadi9208]

How to shutdown, restart server in linux ? How can i view the properties config file and change it ? Could you please explain that in details ?

[@SoftwareTestingAndAutomation]

Sure, I will prepare a video on this topic.

[@haritha8694]

can anyone please tell where to practise unix commands in online ?

[@furkanyigitozgoren3847]

the search/find command was not viewed on the screen but overall it is very useful

[@SoftwareTestingAndAutomation]

Thank you 😊

[@jksharma7]

Thank you sir.....very well done.

[@SoftwareTestingAndAutomation]

You are welcome

[@anamika2866]

Ans to Ques 6: We can also create file using "touch" command.

[@MrKulvikram]

Real purpose of touch command is to update the timestamp on a file.

[@satyarthtiwari7750]

🔥🔥🔥

[@rajeshs8846]

Hi Sir. ls -ltr and ls -l produces the same result? I don't see any differences between them.

[@Gamingympire]

Ls -ltr is used to get the last modified file at the bottom

[@pictures9116]

L for long list T for time R fir recursive This is different

[@vaddenata6735]

Thank for kind information. But I want to correct you one thing. You are saying CD.. Will to one step up. But actually it will one step down

[@SoftwareTestingAndAutomation]

Thank you. cd . . is used to shift one level above the current directory

[@savagesamurai9196]

Can you share the slides?

[@rsz90182]

24. I tried the "grape" command and nothing happened. I got an error.

[@rescueteamdaksh494]

Touch command can also be used to create a File

[@SoftwareTestingAndAutomation]

correct.

[@AnkeRamu]

bro 6 questions ki main command cheppaledu vi and cat chepparu kani you forgot the (touch) command . touch command is used to create a multiple files at a time .

[@sanjiwanipole3666]

Video is awesome but at end of videos commands are not executed practically can you please share those command with examples

[@SoftwareTestingAndAutomation]

Thank you. sure I ll add it.

[@kartheekkartheek464]

Unix can create only txt files ?

[@SoftwareTestingAndAutomation]

You can create any kind of file, just use that file extension.

[@preetikoley3648]

Is this only for interview?!

[@SoftwareTestingAndAutomation]

You can use it for normal learning as-well.

[@AbhishekRaj-pm8zy]

is unix commands and linux commands are same or not??

[@SoftwareTestingAndAutomation]

It's not same but very much similar.

[@shabnamsayyed5699]

Question 8. Cant see two files under new file

[@jayapalp8515]

These are unix commands or Linux commands??? Please any one tell me.

[@SoftwareTestingAndAutomation]

These commands can be used in both Unix and Linux.

[@SHIVAMKUMAR-qh8yo]

Made videos fir experience one candidate, 2-3-5 years experience

[@SoftwareTestingAndAutomation]

Sure

[@ceaserborn1739]

Dissapointed with the explanation for question from 20 to 23. It's not very well explained like others questions which you have done very well.

[@murikinatipallavi5375]

Sir where is it practice tel me...

[@SoftwareTestingAndAutomation]

You can use a Linux machine Terminals or if you have mac you can use terminal. Also you can search Online Linux Terminals to practice.

[@dhanashrijain2302]

Lectures are good but the red background should be changed. Eyes start to suffer after watching continue. Light color background is needed.

[@rsz90182]

Just say PWD means Print Working Directory!!!!

[@SoftwareTestingAndAutomation]

yes, pwd stands for Print Working Directory.

[@userdevil4580]

Present working directory

[@williamhelkins1092]

No examples for main commands. Simple commands your going in detail

[@Ogk8036]

How to list files in sub directories ls *

[@SoftwareTestingAndAutomation]

ls -R

[@amitsinghnegi8102]

Very Basic questions

[@SoftwareTestingAndAutomation]

yes

[@superhitmovies5144]

Sir ur odia Or bengali

[@SoftwareTestingAndAutomation]

Odia 😊

[@vyshnavivalli8474]

I don’t understand 24th question

[@SoftwareTestingAndAutomation]

How to find or search a word inside a file ? The grep command searches through the file, looking for matches to the pattern specified. To use it type grep , then the pattern you are searching for and finally the name of the file (or files) you are searching in. Example :- grep java book.txt

[@DBDilipOnly]

Vi ab.txt is command to open file to write something not to create a file. to create a file command will be touch ab.txt

[@snehapatwardhan5147]

In which website is he practicing

[@tester-lk5co]

Sir I need some help I want to switch into automation testing from manual testing,