cd; ls
ls -F
(; mkdir unix
)
cd unix
; mkdir rensyu
)
ls -a
cd ..
ls unix
/bin/ls; pwd; ../../../../bin/ls
(cd;) cp /bin/ls unix/myls
unix/myls
rm unix/myls; rm tempfile
cd; ls -l
ls -l /bin/cat /bin/ls
*
cd; cd unix; echo > now; ls -l now
date > now
ls -l now; cat now
chmod u-r now
cat now
(Permission denied.)
chmod u+r now; chmod u-w now; cat now
date > now
(Permission denied.)
rm now
chmod u+w now; chmod g-r now; chmod o-r now
(chmod 600 now
も可)
rm now
chmod a+x mybirth
./mybirth
cd; date > unix/now
cd; ln -s unix/now symnow
cat symnow
mv unix/now unix/old; cat symnow
rm symnow; rm unix/old