fix: [myc-check-and-launch-backup] prevent launch from external host through ssh

Signed-off-by: Valentin Lab <valentin.lab@kalysto.org>

bin/myc-check-and-launch-backup

@@ -4,7 +4,7 @@
 ## Quick and dirty check launching backup
 ##
 
-if ! cron_line=$(docker exec -ti myc_cron_1 cat /etc/cron.d/rsync-backup | grep "\* \* \*"); then
+if ! cron_line=$(docker exec myc_cron_1 cat /etc/cron.d/rsync-backup | grep "\* \* \*"); then
     echo "can't find cron_line in cron container." >&2
     exit 1
 fi