[root@xxx /]# ls -l
total 92
drwxr-xr-x  2 root root  4096 Sep 26 17:18 bin
drwxr-xr-x  2 root root  4096 May 11  2011 boot
drwxr-xr-x  7 root root  2180 Nov 25 14:26 dev
drwxr-xr-x 88 root root  4096 Nov 25 17:56 etc
drwxr-xr-x  5 root root  4096 Nov 18 14:31 home
-rw-r--r--  1 root root     0 Apr 20  2014 -horde_conf.flag
drwxr-xr-x 10 root root  4096 Oct 20 18:46 lib
drwxr-xr-x  8 root root  4096 Oct 20 18:46 lib64
drwxr-xr-x  2 root root  4096 May 11  2011 media
drwxr-xr-x  2 root root  4096 May 11  2011 mnt
drwxr-xr-x  2 root root  4096 Dec 14  2012 opt
dr-xr-xr-x 85 root root     0 Nov 24 15:59 proc
drwxr-xr-x  3 root root  4096 Oct 28 11:22 restore
drwxr-x--- 10 root root  4096 Nov 25 14:24 root
drwxr-xr-x  2 root root  4096 Nov 25 14:24 sbin
drwxr-xr-x  2 root root  4096 May 11  2011 selinux
drwxr-xr-x  2 root root  4096 May 11  2011 srv
drwxr-xr-x  7 root root     0 Nov 24 15:59 sys
drwxrwxrwt  5 root root 28672 Nov 25 18:08 tmp
drwxr-xr-x 16 root root  4096 Aug 18 04:06 usr
drwxr-xr-x 22 root root  4096 Jul 22 02:28 var
[root@xxx /]# rm -horde_conf.flag
rm: invalid option -- h
Try `rm ./-horde_conf.flag' to remove the file `-horde_conf.flag'.
Try `rm --help' for more information.