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-rw-r--r--debian/mariadb-server-10.1.postinst5
1 files changed, 4 insertions, 1 deletions
diff --git a/debian/mariadb-server-10.1.postinst b/debian/mariadb-server-10.1.postinst
index 63b7c0c0be2..ccf7d5c88ca 100644
--- a/debian/mariadb-server-10.1.postinst
+++ b/debian/mariadb-server-10.1.postinst
@@ -240,7 +240,10 @@ db_stop # in case invoke failes
# Thus MariaDB server is started via init.d script, which in turn redirects to
# systemctl. If we upgrade from MySQL mysql.service may be masked, which also
# means init.d script is disabled. Unmask mysql service explicitely.
-deb-systemd-helper unmask mysql.service >/dev/null || true
+# Check first that the command exists, to avoid emitting any warning messages.
+if [ -x "$(command -v deb-systemd-helper)" ]; then
+ deb-systemd-helper unmask mysql.service > /dev/null
+fi
#DEBHELPER#