Bash Commands

Question 1

ls

Answer 1

lists the directory contents, common flags are -a, -l

Question 2

echo

Answer 2

prints text to the terminal window. Used in scripts and batch files, shows the value of environmental variables. Common flags; -e, -n

Question 3

touch

Answer 3

creates files in the current directory. Common flags; -a, -m, -r, -d

Question 4

mkdir

Answer 4

Makes a directory in the current directory.

Question 5

grep

Answer 5

“Global Regular Expression” searches for text patterns specified by the user. Common options; -i, -c, -n, -r, -v

Question 6

man

Answer 6

print manual or get help for a command.

Question 7

pwd

Answer 7

“Print Working Directory”

Question 8

cd

Answer 8

“change directory”
.. to go up one directory
use a name to go into
or an absolute path

Question 9

mv

Answer 9

Move/Rename a directory

Question 10

rmdir

Answer 10

removes empty directories

Question 11

rm

Answer 11

removes directories/files

rm -r //force remove file/directory

Question 12

locate

Answer 12

finds a file or directory

Question 13

less

Answer 13

allows user to view the contents of a file in the terminal

Question 14

compgen

Answer 14

shows all available commands, aliases, and functions.

Question 15

cat

Answer 15

a command for reading files, creating files, and concatenating files.

Question 16

|

Answer 16

operator to take the standard input of one command and pass it as the input for another.

Question 17

head

Answer 17

read the first few lines of a file

Question 18

tail

Answer 18

read the end of a file

Question 19

chmod

Answer 19

sets the permissions flag on a file or folder

Question 20

exit

Answer 20

ends the execution of a shell script, close a terminal window

Question 21

more

Answer 21

loads the entire file into the terminal for reading

Question 22

curl

Answer 22

downloads or uploads data using protocols such as FTP, SFTP, HTTP, and HTTPS