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-rw-r--r--src/systemctl/systemctl.c11
1 files changed, 10 insertions, 1 deletions
diff --git a/src/systemctl/systemctl.c b/src/systemctl/systemctl.c
index 6d01756ffb..3abd7dc2e1 100644
--- a/src/systemctl/systemctl.c
+++ b/src/systemctl/systemctl.c
@@ -3782,7 +3782,16 @@ static int enable_unit(DBusConnection *bus, char **args) {
}
if (carries_install_info == 0)
- log_warning("The unit files have no [Install] section. They are not meant to be enabled using systemctl.");
+ log_warning(
+"The unit files have no [Install] section. They are not meant to be enabled\n"
+"using systemctl.\n"
+"Possible reasons for having this kind of units are:\n"
+"1) A unit may be statically enabled by being symlinked from another unit's\n"
+" .wants/ or .requires/ directory.\n"
+"2) A unit's purpose may be to act as a helper for some other unit which has\n"
+" a requirement dependency on it.\n"
+"3) A unit may be started when needed via activation (socket, path, timer,\n"
+" D-Bus, udev, scripted systemctl call, ...).\n");
finish:
if (m)