Linux Commands

Question 0

cat

Answer 0

Print content of file

Question 1

pwd

Answer 1

Print working directory.

Show path to where you are.

Question 2

ls

Answer 2

List directory contents

Question 3

cp

Answer 3

Copy file

Question 4

mv

Answer 4

Rename file

Question 5

mv dir/file dir2/file

Answer 5

Move file

Question 6

rm

Answer 6

Delete (remove) file

Question 7

cd $HOME

Answer 7

Change to home directory

Question 8

ls -alrth myfile

Answer 8

List metadata

Question 9

touch myfile

Answer 9

Create a new file named myfile

Question 10

echo blahblah&raquo_space; myfile

Answer 10

Append “blahblah” to myfile

Question 11

rmdir mydir

Answer 11

Remove directory (if empty)

Question 12

rmdir -rf mydir

Answer 12

Delete directory and everything in it

Question 13

alias xx = ‘some command’

Answer 13

Create shortcut for a command

Question 14

mkdir mydir

Answer 14

Create a directory

Question 15

$ echo $PATH

Answer 15

Show a colon delimited list of directories the OS will look for programs in.

E.g.: /usr/local/bin:/usr/sbin

Question 16

$ env

Answer 16

Show the environment variables like $PATH, $LANG, $HOME, $USER, etc.

Question 17

Three ways to change to the home directory

Answer 17

cd
cd ~
cd $HOME

Question 18

which git

Answer 18

Shows the path in which git will be called from

Question 19

which -a git

Answer 19

Shows all paths in which git is installed

Question 20

scp source destination

Answer 20

Secure Copy file from one place to another