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 10871

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 30039

what is lilo?How it is useful in linux?

HCL, SofTec,

3 12647

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 8600

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 10212

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

Sabre,

4 11606

what is the last file executed during the boot process?

iOPEX,

5 11326

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

2 6667

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 6681

How we can set the password length in linux?

Wipro,

2 7751

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 6768

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

2690

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

Mind Tree,

1 5109

How did you do the Health check in Linux?

Mind Tree,

1 7590

In Linux how you set time a limit on quota?

Mind Tree,

1 6809

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Un-Answered Questions { Linux Commands }

What is lsof command in linux?

1111

How do I check disk space in linux?

1049

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

1077

What are two functions the move mv command can carry out?

1085

What command would you use to create an empty file without opening it to edit it?

1031

What is parallel ssh?

1001

What Command used to lock user password?

1113

What does touch do in linux?

983

How do you create a file in linux?

1064

What is grep command in linux with examples?

1056

What is llvm used for?

1134

How is grep so fast?

999

What is cpu in linux?

1058

You locate a command in the /bin directory but do not know what it does. What command can you use to determine its purpose

1047

How do I set permission to run in linux?

1160

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