確認と strip root@kuro:/usr/local/bin# ls -lt |head -rwxr-xr-x 1 root root 3114 Feb 8 00:30 erb -rwxr-xr-x 1 root root 352 Feb 8 00:30 irb -rwxr-xr-x 1 root root 1541 Feb 8 00:30 rdoc -rwxr-xr-x 1 root root 1491 Feb 8 00:30 ri -rwxr-xr-x 1 root root 153 Feb 8 00:30 testrb -rwxr-xr-x 1 root root 1846643 Feb 8 00:29 ruby -rwxr-xr-x 1 root root 1876000 Feb 3 01:02 eruby root@kuro:/usr/local/bin# strip -