copy a file
cp mydir/file mydir/file_copy
create directory
mkdir mydir
delete file
rm mydir/file
move a file
mv olddir/file newdir/file
delete directory and contents inside
rm -r mydir
list files and folders
ls -o mydir #current dir
ls -ao mydir #current dir including hidden files
change password
passwd
clear screen
clear
browse directory
cd mydir
go to home folder
cd ~
close session
exit