Linux: Navigate Directory

cd dirPath

Change directory

cd

Go to $HOME dir

cd ..

Go up one dir

pwd

Show the current dir

pushd

save the current dir by pushing it to a stack. (use popd to go back.)

popd

goto the dir in stack. (last dir pushd)

Many of these command's argument can be either a file name (relative to current directory), or a full path, e.g. ls /usr/local/bin