Unix Commands Interview Questions, Answers for Freshers and Experienced asked in various Company Job Interviews

Unix Commands Interview Questions

Questions Answers Views Company eMail

What command is used to replace the existing string with some other?

TCS,

8 23240

What Command is used to make a directory?

IBM,

4 11349

Give Command that will move a single file called "unix.txt"

IBM,

7 14508

Give command that will make the file "run.sh" executable?

IBM,

10 21632

Give Command that will change the name of a directly from paypal to eBay

Alcatel, IBM,

3 12323

How does a user get the current date, time in UNIX?

IBM,

6 18057

What Command will remove a Directory in UNIX?

IBM,

8 21333

How does the user view the contents of a text file in UNIX?

IBM,

9 14821

What command will bring user back to their home directory in UNIX?

IBM, Wipro,

13 24177

What command a user use to view a long text file one page at a time in UNIX?

IBM,

8 18052

What command would users use to see what file one page at a time in UNIX?

IBM,

7 14630

fork in unix ?

BFL,

4 11474

in unix echo is used for

BFL, BirlaSoft, Patni,

10 28411

The command grep first second third /usr/you/myfile a) prints lines containing the words first, second or third from the file /usr/you/myfile b) searches for lines containing the pattern first in the files second, third, and /usr/you/myfile and prints them c) searches the files /usr/you/myfiel and third for lines containing the words first or second and prints them d) replaces the word first with the word second in the files third and /usr/you/myfile e) None of the above

IBM,

4 15039

what is the command to list files in a directory in UNIX?

8 12361

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Un-Answered Questions { Unix Commands }

Why is shebang used?

1062

Write a command that will allow a unix system to shut down in 15 minutes, after which it will perform a reboot.

1152

Is grep faster than awk?

996

Describe the zip/unzip command using gzip.

1109

When i run a programm of orphan process. Instead of getting child's parent (ppid)=1 ..i get 1400 and it varies as per system. How can i findthe right soluion??? My pgm: #include # include int main() { int pid; pid=fork(); if(pid < 0) {exit(-1);} else if(pid==0) { printf("Child Process is Sleeping ..."); sleep(10); printf("Orphan Child's Parent ID : %u ",getppid()); } else { printf("Parent Process Completed ... %u ",getpid()); exit(0); } return 0; } Output:

2214

What is awk good for?

1099

How can you see the command line history?

1087

What happens when we execute a unix command?

1096

What is used to type command?

1015

How do I search for a file in unix command?

981

What is the first character of the output in ls l command?

1166

Does cp command overwrite files?

1142

What is grep short for?

1007

What is the search command in unix?

1056

Differentiate cat command from more command.

1091

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