Which command is used for comparing two files?

Unix - Quiz(MCQ)

diff

cmp

comp

comm

Correct Answer : cmp

Explanation : cmp command is used for comparing two files byte by byte. It displays the first mismatch and its location on the terminal. It does not bother about subsequent mismatches but displays only the first mismatch. As soon as the first difference is found, the command terminates and outputs the line and byte in which there is a difference. For example,

$ cmp  file01  file02
file01  file02 differ: Byte 20, Line 2â€‹

diff command is used for converting one file into another in order to make them identical and comm is used for displaying the common elements in both the files.

Recently Updated in Unix Questions

Which command is used for acquiring superuser status?

super

admn

Correct Answer : su

Explanation : Any user can acquire the status of superuser by using the su command. The only condition that needs to be fulfilled here is, he/she must be aware of the root password. For example,

$ su
Password: *****        //root’s password
#pwd
/home/abd             //prompt changes ( super user mode)â€‹

Which command is used to find out the consumption of a specific directory?

mem

Correct Answer : du

Explanation : Sometimes, we may need to find out the consumption of a specific directory rather than an entire file system. For this purpose, du command is used. This command reports usage by recursive examination of the directory structure.

To run the script, we should make it executable first by using _____

chmod +r

chmod +w

chmod +x

chmod +rwx

Correct Answer : chmod +x

Explanation : Before we run the script, it is essential to make the script executable first. After that invoke the script name to run the script. For making the script executable, we have to use chmod +x script_name.