X-Git-Url: http://www.chiark.greenend.org.uk/ucgi/~ianmdlvl/git?p=elogind.git;a=blobdiff_plain;f=man%2Fjournalctl.xml;h=0e779b952c0813538ce47af48320eccd5339d858;hp=b8b29b4cb5da2e6f74c9dd5193e3fbc61b356a0f;hb=a331b5e6d4724365bad9edeb9420c7e26e7f50da;hpb=18d4e7c26e7806ac363d19989df7144d5058ce41
diff --git a/man/journalctl.xml b/man/journalctl.xml
index b8b29b4cb..0e779b952 100644
--- a/man/journalctl.xml
+++ b/man/journalctl.xml
@@ -327,23 +327,51 @@
-
-
-
- Show data only from
- current boot. This will add a match
- for _BOOT_ID= for
- the current boot ID of the
- kernel.
+
+
+
+ Show messages from the specified
+ boot ID or from
+ current boot if no ID
+ is given. This will add a match for
+ _BOOT_ID=.
+
+ The argument is a 128 bit ID given in
+ short or UUID form and optionally followed by
+ :n which identifies the nth
+ boot relative to the boot ID given to the left
+ of :. Supplying a negative
+ value for n will look for a past boot and a
+ positive value for a future boot. The boot IDs
+ are searched for in chronological order. If no
+ number is provided after :,
+ -1 is assumed. A value of 0
+ is valid and equivalent to omitting
+ :0.
+
+ Alternatively, the argument may constist
+ only of :n. In this case, a
+ positive value will look up the nth boot
+ starting from the beginning of the jouranl, a
+ negative value will look up a previous boot
+ relative to the current boot. :0
+ will look for the current boot ID. Thus,
+ :1 is the first boot found in
+ the journal, :2 the second
+ and so on; while :-1 is the
+ previous boot, :-2 the boot
+ before that and so on. Omitting a value after
+ : will look for the previous
+ boot.
- Show kernel messages from
- current boot. This implies
- and adds the match _TRANSPORT=kernel.
+ Show only kernel messages. This
+ implies and adds the match
+ _TRANSPORT=kernel.
@@ -721,6 +749,10 @@
journalctl /dev/sda
+ Show all kernel logs from last boot:
+
+ journalctl -k -b :
+