Question

Some multiple choice questions of Computer Science: Linux command;

Actually I can google it but the choice here is a little..unclear. So I can't make sure..Thank you!

1:What does the Linux command “cat” do?

a. copy the contents of a file to the screen

b. count the number of characters in a file

c. create a Linux catalog

d. open up an edit session allowing you to modify a file

2:Which of the following Linux commands is best for getting “help” on the syntax and format of a Linux command?

a. grep

b. rm -r

c. ls -l

d. man

3:The linux command “>”

a. redirects the output of a command into a file

b. compares two files to see which one is larger

c. does nothing. “>” is NOT a linux command.

d. compares two files and displays all the differences

Thank You!

Answer 1

Ans:

1) (A)

In the below example, it will show contents of /etc/passwd file.

# cat /etc/passwd
root:x:0:0:root:/root:/bin/bash
bin:x:1:1:bin:/bin:/sbin/nologin
narad:x:500:500::/home/narad:/bin/bash

2) (D)

The man command is used to format and display the man pages. The man pages are a user manual that hey provide extensive documentation about commands.

3) (A)