Work on the command line

Question 1

What is the symbolic link to the system’s default shell?

Answer 1

/bin/sh

Question 2

What shortcut command will change to your home directory?

Answer 2

cd ~

Question 3

What command show the working directory?

Answer 3

pwd

Question 4

What command runs an external program you specify and replaces the shell?

Answer 4

exec

Question 5

What command shows how long a command took to run?

Answer 5

time

Question 6

What command will terminate a logged in shell?

Answer 6

logout

Question 7

What command will terminate any shell?

Answer 7

exit

Question 8

What command show the path environment variable?

Answer 8

echo $PATH

Question 9

What key sequence will search through the BASH history?

Answer 9

Ctrl + R

Question 10

What command shows the last 500 commands entered?

Answer 10

history

Question 11

What are the two global bash configuration files and where are they?

Answer 11

/etc/bash.bashrc and /etc/profile

Question 12

What command will set an environment variable?

Answer 12

export Env_Var=value

Question 13

What command will show all the environment variables?

Answer 13

env

Question 14

What command will delete an environment variable?

Answer 14

unset

Question 15

What command will list all shell variables, environmental variables, local variables, and shell functions?

Answer 15

set