Use chgrp instead of chmod, as the : syntax is not available everywhere. Closes #556. Thanks to neubloc

contrib/generic-init.d/celerybeat

@@ -65,7 +65,7 @@ if [ -n "$CELERYBEAT_USER" ]; then
 fi
 if [ -n "$CELERYBEAT_GROUP" ]; then
     DAEMON_OPTS="$DAEMON_OPTS --gid $CELERYBEAT_GROUP"
-    chown ":$CELERYBEAT_GROUP" $CELERYBEAT_LOG_DIR $CELERYBEAT_PID_DIR
+    chgrp "$CELERYBEAT_GROUP" $CELERYBEAT_LOG_DIR $CELERYBEAT_PID_DIR
 fi
 
 CELERYBEAT_CHDIR=${CELERYBEAT_CHDIR:-$CELERYD_CHDIR}

contrib/generic-init.d/celeryd

@@ -64,7 +64,7 @@ if [ -n "$CELERYD_USER" ]; then
 fi
 if [ -n "$CELERYD_GROUP" ]; then
     DAEMON_OPTS="$DAEMON_OPTS --gid=$CELERYD_GROUP"
-    chown ":$CELERYD_GROUP" $CELERYD_LOG_DIR $CELERYD_PID_DIR
+    chgrp "$CELERYD_GROUP" $CELERYD_LOG_DIR $CELERYD_PID_DIR
 fi
 
 if [ -n "$CELERYD_CHDIR" ]; then

contrib/generic-init.d/celeryevcam

@@ -137,7 +137,7 @@ if [ -n "$CELERYEV_USER" ]; then
 fi
 if [ -n "$CELERYEV_GROUP" ]; then
     DAEMON_OPTS="$DAEMON_OPTS --gid $CELERYEV_GROUP"
-    chown "$CELERYEV_GROUP" $CELERYBEAT_LOG_DIR $CELERYEV_PID_DIR
+    chgrp "$CELERYEV_GROUP" $CELERYBEAT_LOG_DIR $CELERYEV_PID_DIR
 fi
 
 CELERYEV_CHDIR=${CELERYEV_CHDIR:-$CELERYD_CHDIR}