Unix/Linux basic commands

where I am
pwd

go to FOLDERNAME folder
cd FOLDERNAME

go to parent folder
cd ..

display what is in the folder
ls
(-l all files)
(- la all include hidden)

create a folder
mkdir FOLDERNAME

display an user manual for a command
man COMMAND

switch user
su

run a command like admin (= "as administrator" in windows)
sudo COMMAND ...

desplay results that match a specified pattern
COMMAND | grep STRING

show commands history
history