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-rw-r--r--src/journal/journalctl.c4
1 files changed, 3 insertions, 1 deletions
diff --git a/src/journal/journalctl.c b/src/journal/journalctl.c
index 2a5f2b37e8..2639fd6cf5 100644
--- a/src/journal/journalctl.c
+++ b/src/journal/journalctl.c
@@ -1910,7 +1910,9 @@ static int access_check(sd_journal *j) {
break;
case EPROTONOSUPPORT:
- log_warning_errno(err, "Journal file %s uses an unsupported feature, ignoring file.", path);
+ log_warning_errno(err, "Journal file %1$s uses an unsupported feature, ignoring file.\n"
+ "Use SYSTEMD_LOG_LEVEL=debug journalctl --file=%1$s to see the details.",
+ path);
break;
case EBADMSG: