Commands

Question 1

Used to drill down to specific content

Answer 1

”|” - pipe

Ex: cat secure | grep fail
- this will search for any lines that have “fail” in them

Question 2

Used to display last few lines of a file

Answer 2

tail “file” - this will display the last 10 lines by default. Ex: tail cron; tail secure

To change the number of lines displayed, add “-n” flag. Ex: tail -n 20 secure - will display last 20 lines of the file “secure”

Use -f flag to get realtime updates to the file displayed. Ex: tail -f secure

Question 3

Show the current directory you are working in

Answer 3

pwd

Question 4

Changing directories

Answer 4

cd “directory name”

Question 5

Automatically completes the command being typed

Answer 5

Hit the Tab key

Use Tab Tab to complete a chosen command if more than one option is available

Question 6

Go up one directory level

Answer 6

cd ..

Question 7

Go back to home directory of current user

Answer 7

cd ~

Question 8

Go to specific folder

Answer 8

cd “folder name”

Question 9

List contents of a current directory

Answer 9

ls

ls / will list root directory

ls -a will list complete content if a directory, including hidden files

Question 10

Move to beginning of the line

Move to the end of the line

Answer 10

“Ctrl” “a”

“Ctrl” “e”