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

Linux Commands Interview Questions

Questions Answers Views Company eMail

What is the command to change from /etc/passwd file to /etc/shadow file?

4 10673

i am prepairing for 2+ yrs exp in oracle/unix production support, which topics should i cover in unix/linux and sql plz help

HCL,

2 29888

what is lilo?How it is useful in linux?

HCL, SofTec,

3 12473

I have a user name in /etc/vsftpd/user_list which is for blocking the ftp user. Now i blocked the user as well ,but without removing username in user_list i wanna access the users home directory and his own directory .How will you access the data ????

Span Systems,

3 8429

I have my default runlevel is init5 now i have configured to init 3,now i wanna run my system in init3 process without reboot the system .How will you do for this scenario?

Span Systems,

6 9991

What is the difference between kill and kill -9 commands?

Sabre,

4 11371

what is the last file executed during the boot process?

iOPEX,

5 11094

what is first RHEL 5.x version support ext4 filesystem?

2 6521

In /boot/grub/grub.conf file there is a line kernel /vmlinuz-version ro root=/dev/sda2, What is the meaning of "/" before vmlinuz? Pls explain?

HCL,

1 6572

How we can set the password length in linux?

Wipro,

2 7620

When u comment the ctrl+alt+del trap in the /etc/inittab save the file. Tell the command to save the changes without rebooting the machine?

HCL,

1 6660

How to activate / deploy licence in RHEL 6 and what will happen if you don't activate / deploy licence in RHEL 6 ?

2637

How to add Crete a new ftp user? or How to add a exiting user into FTP ?

Mind Tree,

1 4990

How did you do the Health check in Linux?

Mind Tree,

1 7500

In Linux how you set time a limit on quota?

Mind Tree,

1 6682

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Un-Answered Questions { Linux Commands }

What is ls command and what it does?

946

what is the fastest way to enter a series of commands from the command-line in linux

996

Which command puts a script to sleep untill a signal is recieved?

1016

What are vim commands?

967

The head command writes the how many lines of a file to screen?

1035

What does top do in linux?

959

Who whoami linux?

951

What does in makefile do?

952

What is the difference between cd and cd in linux?

949

How do you grep?

909

What is apple llvm?

955

How do you know which shell I am using in linux?

994

What will happen when a system call is encountered in a user program?

1985

Which command will show you free/used memory?

933

Is cmake a compiler?

1000

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