X-Git-Url: https://www.chiark.greenend.org.uk/ucgi/~ianmdlvl/git?a=blobdiff_plain;f=man%2Fjournalctl.xml;h=c8559a0cb01740b4987eb52e8b0437082e859883;hb=dc7adf202b82fc0054c457ce6ca3bcedb88dde57;hp=0e779b952c0813538ce47af48320eccd5339d858;hpb=a331b5e6d4724365bad9edeb9420c7e26e7f50da;p=elogind.git diff --git a/man/journalctl.xml b/man/journalctl.xml index 0e779b952..c8559a0cb 100644 --- a/man/journalctl.xml +++ b/man/journalctl.xml @@ -233,53 +233,137 @@ Controls the formatting of the journal entries that - are shown. Takes one of - short, - short-monotonic, - verbose, - export, - json, - json-pretty, - json-sse, - cat. short - is the default and generates an output - that is mostly identical to the - formatting of classic syslog - files, showing one line per journal - entry. short-monotonic - is very similar but shows monotonic - timestamps instead of wallclock - timestamps. verbose - shows the full structured entry items - with all - fields. export - serializes the journal into a binary - (but mostly text-based) stream - suitable for backups and network - transfer (see Journal - Export Format for more - information). json - formats entries as JSON data - structures, one per - line (see Journal - JSON Format for more - information). json-pretty - also formats entries as JSON data - structures, but formats them in - multiple lines in order to make them - more readable for - humans. json-sse - also formats entries as JSON data - structures, but wraps them in a format - suitable for Server-Sent - Events. cat - generates a very terse output only - showing the actual message of each - journal entry with no meta data, not - even a timestamp. + are shown. Takes one of the following options: + + + + + + + + is the default + and generates an output + that is mostly identical + to the formatting of + classic syslog files, + showing one line per + journal entry. + + + + + + + + + is very similar + but shows monotonic + timestamps instead of + wallclock timestamps. + + + + + + + + + + is very similar + but shows ISO 8601 + wallclock timestamps. + + + + + + + + + + shows the + full-structured entry + items with all fields. + + + + + + + + + + serializes the + journal into a binary + (but mostly text-based) + stream suitable for + backups and network + transfer (see Journal + Export Format + for more + information). + + + + + + + + + formats entries + as JSON data structures, + one per line (see Journal + JSON Format for + more information). + + + + + + + + + formats entries as + JSON data structures, + but formats them in + multiple lines in order + to make them more + readable for humans. + + + + + + + + + formats entries as + JSON data structures, + but wraps them in a + format suitable for Server-Sent + Events. + + + + + + + + + generates a very + terse output only + showing the actual + message of each journal + entry with no meta data, + not even a timestamp. + + + + + @@ -327,42 +411,50 @@ - - + + - Show messages from the specified - boot ID or from - current boot if no ID - is given. This will add a match for + Show messages from a specific + boot. 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. + The argument may be empty, in which case + logs for the current boot will be shown. + + If the boot ID is omitted, a positive + offset will look up + the boots starting from the beginning of the + journal, and a equal-or-less-than zero + offset will look up + boots starting from the end of the + journal. Thus, 1 means the + first boot found in the journal in the + chronological order, 2 the + second and so on; while -0 + is the last boot, -1 the + boot before that, and so on. An empty + offset is equivalent + to specifying -0, except + when the current boot is not the last boot + (e.g. because was + specified to look at logs from a different + machine). + + If the 32 character + ID is specified, it + may optionally be followed by + offset which + identifies the boot relative to the one given by + boot ID. Negative + values mean earlier boots and a positive values + mean later boots. If + offset is not + specified, a value of zero is assumed and the + logs for the boot given by + ID are shown. + + + @@ -450,6 +542,16 @@ cursor. + + + + Start showing entries from the + location in the journal + after the location + specified by the this cursor. + + + @@ -749,9 +851,9 @@ journalctl /dev/sda - Show all kernel logs from last boot: + Show all kernel logs from previous boot: - journalctl -k -b : + journalctl -k -b -1