forked from dan/liminix
add short note about persistent logs
This commit is contained in:
parent
3357d21d7f
commit
ba5e4704a0
@ -131,6 +131,26 @@ human-readable format, use :command:`s6-tai64nlocal`.
|
||||
1970-01-02 21:51:48.832588765 wan.link.pppoe sent [LCP ConfReq id=0x1 <asyncmap 0x0> <magic 0x667a9594> <pcomp> <accom
|
||||
p>]
|
||||
|
||||
Log persistence
|
||||
---------------
|
||||
|
||||
Logs written to :file:`/run/log/` will not survive a reboot or crash,
|
||||
as it is an ephemeral filesystem.
|
||||
|
||||
On supported hardware you can enable logging to `pstore
|
||||
<https://www.kernel.org/doc/Documentation/ABI/testing/pstore>` which
|
||||
means the most recent log messages will be preserved on reboot.
|
||||
Set the config option ``logging.persistent.enable = true``, log messages will be written to :file:/dev/pmsg0. After rebooting,
|
||||
|
||||
.. code-block:: console
|
||||
|
||||
# mount -t pstore pstore /sys/fs/pstore/
|
||||
# ls -l /sys/fs/pstore/
|
||||
-r--r--r-- 1 43071 pmsg-ramoops-0
|
||||
# cat /sys/fs/pstore/pmsg-ramoops-0
|
||||
@40000000000000282c997d29 mydevice klogd <6>[ 30.793756] int: port 2(wlan0) entered blocking state
|
||||
[log messages from before the reboot follow]
|
||||
|
||||
|
||||
|
||||
Updating an installed system (JFFS2)
|
||||
|
Loading…
Reference in New Issue
Block a user