Low: Fix protential error for RA:nagios

VAR="/etc/path with spcaes"

[ ! -f ${VAR} ]
equals to [ ! -f /etc/path with spaces ] ### syntax error

rm -f ${VAR}
equals to rm -f /etc/path with spaces ### accidentally remove files/folders

-eq and -ne with number (not string)

Signed-off-by: guessi <guessi@gmail.com>