* usr/bin/purge-old-kernels, usr/share/man/man1/purge-old-kernels.1:

- add a --quiet option for cronjobs
  - add note in the manpage

debian/changelog

@@ -7,6 +7,11 @@ byobu (5.116) unreleased; urgency=medium
     - save 100K lines of scrollback, rather than 10K, which I find gets
       eclipsed too often when you actually need it
 
+  [ janvonde ]
+  * usr/bin/purge-old-kernels, usr/share/man/man1/purge-old-kernels.1:
+    - add a --quiet option for cronjobs
+    - add note in the manpage
+
  -- Dustin Kirkland <kirkland@ubuntu.com>  Mon, 06 Feb 2017 12:22:26 -0600
 
 byobu (5.115-0ubuntu1) zesty; urgency=medium

usr/bin/purge-old-kernels

@@ -28,10 +28,18 @@ fi
 # NOTE: This script will ALWAYS keep the currently running kernel
 # NOTE: Default is to keep 2 more, user overrides with --keep N
 KEEP=2
+# NOTE: This script will give a hint if no kernels are eligible for removal
+# NOTE: You can disable this with the --quit parameter
+QUIET=0
 # NOTE: Any unrecognized option will be passed straight through to apt
 APT_OPTS=
 while [ ! -z "$1" ]; do
 	case "$1" in
+		--quiet)
+			# No hint on no kernels for removal, better for cronjobs
+			QUIET=1
+			shift 1
+		;;
 		--keep)
 			# User specified the number of kernels to keep
 			KEEP="$2"
@@ -61,8 +69,12 @@ for v in $VERSIONS; do
 done
 
 if [ -z "$PURGE" ]; then
-	echo "No kernels are eligible for removal"
-	exit 0
+        if [ "${QUIET}" -ne "1" ]; then
+                echo "No kernels are eligible for removal"
+                exit 0
+        else
+                exit 0
+        fi
 fi
 
 # Use apt-get, rather than apt, for compatibility with precise/trusty

usr/share/man/man1/purge-old-kernels.1

@@ -3,11 +3,13 @@
 purge-old-kernels - remove old kernel and header packages from the system
 
 .SH SYNOPSIS
-\fBpurge-old-kernels\fP [--keep N] [*]
+\fBpurge-old-kernels\fP [--keep N] [--quiet] [*]
 
 .SH DESCRIPTION
 This program will remove old kernel and header packages from the system, freeing disk space.  It will never remove the currently running kernel.  By default, it will keep at least the latest 2 kernels, but the user can override that value using the --keep parameter.  Any additional parameters will be passed directly to \fBapt-get\fP(8).
 
+The --quiet option is useful for cronjobs, to ensure silence messages when there's nothing new to do.
+
 This program requires administrative access.
 
 .SH EXAMPLE