examples/init.d: fix web.listen-address flag
CLI flags use two dashes instead of one since v0.15.0
Also, use default port number
Fixes
@@ -4,7 +4,7 @@ RETVAL=0
PROG="node_exporter"
EXEC="/etc/node_exporter/node_exporter"
LOCKFILE="/var/lock/subsys/$PROG"
-OPTIONS="-web.listen-address=:9201"
+OPTIONS="--web.listen-address=:9100"
# Source function library.
if [ -f /etc/rc.d/init.d/functions ]; then
