명령어

mkdir        (make directory)

pwd           (print work directory)

cd              (change directory)

ls               (lists directory) 

                  -l  -n  -a  -d  -R  -F

man           (메뉴엘)

--help        (상세도움말)

cp              (copy file directory)

                  cp /backup/grub.cfg /2/grub.cfg

                  cp /backup/inittab ../../2

                  cp /2/grub.cfg /2/inittab /2/login ../../2/3

                  cp /2/3/* /2/3/4

                 -p  -r  

                 cp -r /backup ./

mv           (move file directory)

mkdir       (make directory)

                 -p

rmdir        (remove directory)

                 -p

rm            (remove file directory)

                 -f -r

ln             (link)

                -s