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

Unix Commands Interview Questions

Questions Answers Views Company eMail

Suppose 1000 processes are running on the system out of those if you have to show only certain process ids which command will you use?

5 12683

What is the syntax of grep command and what is its use?

6 12059

How do you move a process which is running background to foreground?

9 17746

How do you stop a running process?

7 16604

What is the procedure of "at" and crontab" commands?

4 11748

Which command will you use to change the permissions on file?

7 10887

What is the use of pipes?

4 9439

Through which command will redirect output to bOth screen and files at the same time?

3 10939

How do you know about running processes of a particular user?

11 21067

How do you remove a crontab file?

6 18785

What is the basic difference between unix and windows operating systems?

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43 179526

How do you find path of a directory? Give its syntax.

7 16241

In vi editor how do you execute unix commands?

10 21910

what is the use of "test" command in unix?

4 21270

Give a regular expression that finds two things, try to come up with regular expressions that find each individually using "egrep" command?

5 14801

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Un-Answered Questions { Unix Commands }

What does #!/ Bin sh do?

1026

What do know about tee command and its usage?

1127

Explain the terms ‘system calls’ and ‘library functions’ with respect to unix commands?

1159

What are some command words?

1090

what is the advaantage of each user having its own copy of the shell?

2509

What is grep short for?

1005

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:

2209

What is a bash command?

1121

What command will change your prompt to myprompt?

1258

Write a command to kill the last background job?

1028

Which command is used to delete all files in the current directory and all its sub-directories?

1215

Does cp command overwrite files?

1138

What is awk used for?

1085

Enlist some filename manipulation commands in unix.

1092

Enumerate some of the most commonly used network commands in unix?

1111

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