[mysql@roidb01 mysql]$ cd ..
[mysql@roidb01 backup]$ ls -lh
total 56K
-rw-rw-r-- 1 mysql mysql 708 Apr 14 22:46 mybackup.sh
drwxr-xr-x 2 mysql mysql 32K Apr 14 22:46 mysql
drwx------ 2 mysql mysql 20K Apr 14 22:46 -t

[mysql@roidb01 backup]$ rm -rf --  -t
[mysql@roidb01 backup]$ 

[mysql@roidb01 backup]$ ls -lh
total 36K
-rw-rw-r-- 1 mysql mysql 708 Apr 14 22:46 mybackup.sh
drwxr-xr-x 2 mysql mysql 32K Apr 14 22:46 mysql
[mysql@roidb01 backup]$