hostname
my computer’s network name
pushd
push directory
mv
Move a file or a directory
cd
Change Directory
export
export/set a new environment variable
sudo
DANGER! become super user root DANGER!
rmdir
remove directory
find
find files
exit
exit the shell
ls
list directory
cat
Print the whole file
apropos
find what man page is appropriate
pwd
print working directory
grep
find things inside files
mkdir
make directory
man
read a manual page
less
page through a file
xargs
execute arguments
cp
copy a file or directory
env
look at your environment
echo
print some arguments
popd
Pop directory