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-rw-r--r--mount/umount.c5
1 files changed, 4 insertions, 1 deletions
diff --git a/mount/umount.c b/mount/umount.c
index 9690f2ac0..5b9398793 100644
--- a/mount/umount.c
+++ b/mount/umount.c
@@ -152,7 +152,10 @@ static void complain(int err, const char *dev) {
case EBUSY:
/* Let us hope fstab has a line "proc /proc ..."
and not "none /proc ..."*/
- error (_("umount: %s: device is busy"), dev); break;
+ error (_("umount: %s: device is busy.\n"
+ " (In some cases useful info about processes that use\n"
+ " the device is found by lsof(8) or fuser(1))"), dev);
+ break;
case ENOENT:
error (_("umount: %s: not found"), dev); break;
case EPERM: