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2014-08-16T10:51:08Z
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<p><b>Página nueva</b></p><div>__NOTOC__<br />
* [[:#dmesg | dmesg]]<br />
<br />
== dmesg ==<br />
<br />
<syntaxhighlight lang="bash"><br />
<br />
[root@Pridd ~]# dmesg --help<br />
<br />
Usage:<br />
dmesg [options]<br />
<br />
Options:<br />
-C, --clear clear the kernel ring buffer<br />
-c, --read-clear read and clear all messages<br />
-D, --console-off disable printing messages to console<br />
-E, --console-on enable printing messages to console<br />
-F, --file <file> use the file instead of the kernel log buffer<br />
-f, --facility <list> restrict output to defined facilities<br />
-H, --human human readable output<br />
-k, --kernel display kernel messages<br />
-L, --color[=<when>] colorize messages (auto, always or never)<br />
-l, --level <list> restrict output to defined levels<br />
-n, --console-level <level> set level of messages printed to console<br />
-P, --nopager do not pipe output into a pager<br />
-r, --raw print the raw message buffer<br />
-S, --syslog force to use syslog(2) rather than /dev/kmsg<br />
-s, --buffer-size <size> buffer size to query the kernel ring buffer<br />
-u, --userspace display userspace messages<br />
-w, --follow wait for new messages<br />
-x, --decode decode facility and level to readable string<br />
-d, --show-delta show time delta between printed messages<br />
-e, --reltime show local time and time delta in readable format<br />
-T, --ctime show human readable timestamp<br />
-t, --notime don't print messages timestamp<br />
--time-format <format> show time stamp using format:<br />
[delta|reltime|ctime|notime|iso]<br />
Suspending/resume will make ctime and iso timestamps inaccurate.<br />
<br />
-h, --help display this help and exit<br />
-V, --version output version information and exit<br />
<br />
Supported log facilities:<br />
kern - kernel messages<br />
user - random user-level messages<br />
mail - mail system<br />
daemon - system daemons<br />
auth - security/authorization messages<br />
syslog - messages generated internally by syslogd<br />
lpr - line printer subsystem<br />
news - network news subsystem<br />
<br />
Supported log levels (priorities):<br />
emerg - system is unusable<br />
alert - action must be taken immediately<br />
crit - critical conditions<br />
err - error conditions<br />
warn - warning conditions<br />
notice - normal but significant condition<br />
info - informational<br />
debug - debug-level messages<br />
<br />
<br />
For more details see dmesg(1).<br />
<br />
[root@Pridd ~]# dmesg --version<br />
dmesg from util-linux 2.24<br />
<br />
[root@Pridd ~]# dmesg<br />
.<br />
.<br />
.<br />
[35060.001448] Adding 4087700k swap on /dev/sda2. Priority:100 extents:1 across:4087700k FS<br />
[35105.721309] Adding 499996k swap on /mnt/MiSwapfile. Priority:50 extents:1 across:499996k FS<br />
[35125.778044] Adding 2097148k swap on /mnt/swapfile. Priority:500 extents:6 across:2392060k FS<br />
[35657.983304] Adding 4087700k swap on /dev/sda2. Priority:-1 extents:1 across:4087700k FS<br />
[35687.522292] Adding 4087700k swap on /dev/sda2. Priority:100 extents:1 across:4087700k FS<br />
<br />
[root@Pridd ~]# dmesg --reltime<br />
.<br />
.<br />
.<br />
[Aug16 04:33] Adding 4087700k swap on /dev/sda2. Priority:100 extents:1 across:4087700k FS<br />
[Aug16 04:34] Adding 499996k swap on /mnt/MiSwapfile. Priority:50 extents:1 across:499996k FS<br />
[ +20.056735] Adding 2097148k swap on /mnt/swapfile. Priority:500 extents:6 across:2392060k FS<br />
[Aug16 04:43] Adding 4087700k swap on /dev/sda2. Priority:-1 extents:1 across:4087700k FS<br />
[Aug16 04:44] Adding 4087700k swap on /dev/sda2. Priority:100 extents:1 across:4087700k FS<br />
[Aug16 05:02] psmouse serio4: Touchpad at isa0060/serio4/input0 lost sync at byte 6<br />
[ +0.010389] psmouse serio4: Touchpad at isa0060/serio4/input0 - driver resynced.<br />
<br />
[rrc@Pridd ~]$ dmesg -f lpr<br />
<br />
[rrc@Pridd ~]$ dmesg -f auth<br />
<br />
[rrc@Pridd ~]$ dmesg -f mail<br />
<br />
[rrc@Pridd ~]$ dmesg -f daemon<br />
[ 1.809026] dracut: dracut-034<br />
[ 1.891473] systemd-udevd[193]: starting version 208<br />
[ 2.836379] dracut: Starting plymouth daemon<br />
.<br />
.<br />
.<br />
[ 6.903736] systemd[1]: Starting Journal Service...<br />
[ 6.904368] systemd[1]: Started Journal Service.<br />
[ 6.973581] systemd-readahead[451]: Bumped block_nr parameter of 8:0 to 20480. This is a temporary hack and should be removed one day.<br />
[ 8.148602] systemd-udevd[512]: starting version 208<br />
[ 8.619331] systemd-udevd[521]: renamed network interface eth0 to enp3s0<br />
[ 8.712155] systemd-udevd[524]: renamed network interface wlan0 to wlp2s0<br />
<br />
[rrc@Pridd ~]$ dmesg -ef kern<br />
.<br />
.<br />
.<br />
[Aug16 05:12] psmouse serio4: Touchpad at isa0060/serio4/input0 lost sync at byte 6<br />
[ +0.011434] psmouse serio4: Touchpad at isa0060/serio4/input0 - driver resynced.<br />
[Aug16 05:13] psmouse serio4: Touchpad at isa0060/serio4/input0 lost sync at byte 6<br />
[ +0.011420] psmouse serio4: Touchpad at isa0060/serio4/input0 - driver resynced.<br />
[ +2.464155] psmouse serio4: Touchpad at isa0060/serio4/input0 lost sync at byte 6<br />
[ +0.011457] psmouse serio4: Touchpad at isa0060/serio4/input0 - driver resynced.<br />
<br />
[rrc@Pridd ~]$ dmesg -ek<br />
<br />
[rrc@Pridd ~]$ dmesg -ef user<br />
<br />
[rrc@Pridd ~]$ dmesg -ef syslog<br />
[Aug15 18:49] systemd-journald[455]: Received request to flush runtime journal from PID 1<br />
<br />
[rrc@Pridd ~]$ dmesg -el emerg<br />
<br />
[rrc@Pridd ~]$ dmesg -el alert<br />
<br />
[rrc@Pridd ~]$ dmesg -el crit<br />
<br />
[rrc@Pridd ~]$ dmesg -el err<br />
[Aug16 03:54] sd 6:0:0:0: [sdb] No Caching mode page found<br />
[ +0.000004] sd 6:0:0:0: [sdb] Assuming drive cache: write through<br />
[ +0.003267] sd 6:0:0:0: [sdb] No Caching mode page found<br />
[ +0.000008] sd 6:0:0:0: [sdb] Assuming drive cache: write through<br />
[ +1.783254] sd 6:0:0:0: [sdb] No Caching mode page found<br />
[ +0.000008] sd 6:0:0:0: [sdb] Assuming drive cache: write through<br />
[Aug16 03:57] sd 6:0:0:0: [sdb] No Caching mode page found<br />
[ +0.000006] sd 6:0:0:0: [sdb] Assuming drive cache: write through<br />
<br />
[rrc@Pridd ~]$ dmesg -el warn<br />
.<br />
.<br />
.<br />
[Aug16 05:08] psmouse serio4: Touchpad at isa0060/serio4/input0 lost sync at byte 6<br />
[Aug16 05:12] psmouse serio4: Touchpad at isa0060/serio4/input0 lost sync at byte 6<br />
[Aug16 05:13] psmouse serio4: Touchpad at isa0060/serio4/input0 lost sync at byte 6<br />
[ +2.475575] psmouse serio4: Touchpad at isa0060/serio4/input0 lost sync at byte 6<br />
[Aug16 05:18] psmouse serio4: Touchpad at isa0060/serio4/input0 lost sync at byte 6<br />
[Aug16 05:19] psmouse serio4: Touchpad at isa0060/serio4/input0 lost sync at byte 6<br />
<br />
[rrc@Pridd ~]$ dmesg -el notice<br />
.<br />
.<br />
.<br />
[Aug16 05:12] psmouse serio4: Touchpad at isa0060/serio4/input0 - driver resynced.<br />
[Aug16 05:13] psmouse serio4: Touchpad at isa0060/serio4/input0 - driver resynced.<br />
[ +2.475612] psmouse serio4: Touchpad at isa0060/serio4/input0 - driver resynced.<br />
[Aug16 05:18] psmouse serio4: Touchpad at isa0060/serio4/input0 - driver resynced.<br />
[Aug16 05:19] psmouse serio4: Touchpad at isa0060/serio4/input0 - driver resynced.<br />
[Aug16 05:22] psmouse serio4: Touchpad at isa0060/serio4/input0 - driver resynced.<br />
<br />
[rrc@Pridd ~]$ dmesg -el info<br />
.<br />
.<br />
.<br />
[Aug16 04:33] Adding 4087700k swap on /dev/sda2. Priority:100 extents:1 across:4087700k FS<br />
[Aug16 04:34] Adding 499996k swap on /mnt/MiSwapfile. Priority:50 extents:1 across:499996k FS<br />
[ +20.056735] Adding 2097148k swap on /mnt/swapfile. Priority:500 extents:6 across:2392060k FS<br />
[Aug16 04:43] Adding 4087700k swap on /dev/sda2. Priority:-1 extents:1 across:4087700k FS<br />
[Aug16 04:44] Adding 4087700k swap on /dev/sda2. Priority:100 extents:1 across:4087700k FS<br />
<br />
[rrc@Pridd ~]$ dmesg -el debug<br />
.<br />
.<br />
.<br />
[ +0.000002] PM: Looking for hibernation image.<br />
[ +0.002087] PM: Image not found (code -22)<br />
[ +0.000003] PM: Hibernation image not present or could not be loaded.<br />
[ +4.108699] snd_hda_intel 0000:00:1b.0: irq 43 for MSI/MSI-X<br />
[ +0.093792] ath: EEPROM regdomain: 0x60<br />
[ +0.000001] ath: EEPROM indicates we should expect a direct regpair map<br />
[ +0.000002] ath: Country alpha2 being used: 00<br />
[ +0.000001] ath: Regpair used: 0x60<br />
[ +0.003824] ieee80211 phy0: Selected rate control algorithm 'minstrel_ht'<br />
[Aug15 18:50] atl1c 0000:03:00.0: irq 44 for MSI/MSI-X<br />
[Aug16 03:54] sd 6:0:0:0: [sdb] Mode Sense: 23 00 00 00<br />
<br />
[rrc@Pridd ~]$ dmesg -eHl debug<br />
<br />
[rrc@Pridd ~]$ dmesg -eL auto -l debug<br />
.<br />
.<br />
.<br />
[ +0.020073] PM: Basic memory bitmaps freed<br />
[ +0.002976] PM: Hibernation image partition 8:2 present<br />
[ +0.000002] PM: Looking for hibernation image.<br />
[ +0.002087] PM: Image not found (code -22)<br />
[ +0.000003] PM: Hibernation image not present or could not be loaded.<br />
[ +4.108699] snd_hda_intel 0000:00:1b.0: irq 43 for MSI/MSI-X<br />
[ +0.093792] ath: EEPROM regdomain: 0x60<br />
[ +0.000001] ath: EEPROM indicates we should expect a direct regpair map<br />
[ +0.000002] ath: Country alpha2 being used: 00<br />
[ +0.000001] ath: Regpair used: 0x60<br />
[ +0.003824] ieee80211 phy0: Selected rate control algorithm 'minstrel_ht'<br />
[Aug15 18:50] atl1c 0000:03:00.0: irq 44 for MSI/MSI-X<br />
[Aug16 03:54] sd 6:0:0:0: [sdb] Mode Sense: 23 00 00 00<br />
<br />
[rrc@Pridd ~]$ dmesg -eL auto -u<br />
.<br />
.<br />
.<br />
[ +0.000632] systemd[1]: Started Journal Service.<br />
[ +0.069213] systemd-readahead[451]: Bumped block_nr parameter of 8:0 to 20480. This is a temporary hack and should be removed one day.<br />
[ +1.175021] systemd-udevd[512]: starting version 208<br />
[ +0.470729] systemd-udevd[521]: renamed network interface eth0 to enp3s0<br />
[ +0.092824] systemd-udevd[524]: renamed network interface wlan0 to wlp2s0<br />
[ +4.718958] systemd-journald[455]: Received request to flush runtime journal from PID 1<br />
<br />
<br />
[rrc@Pridd ~]$ dmesg -exHL auto -l err<br />
kern :err : [Aug16 03:54] sd 6:0:0:0: [sdb] No Caching mode page found<br />
kern :err : [ +0.000004] sd 6:0:0:0: [sdb] Assuming drive cache: write throu<br />
kern :err : [ +0.003267] sd 6:0:0:0: [sdb] No Caching mode page found<br />
kern :err : [ +0.000008] sd 6:0:0:0: [sdb] Assuming drive cache: write throu<br />
kern :err : [ +1.783254] sd 6:0:0:0: [sdb] No Caching mode page found<br />
kern :err : [ +0.000008] sd 6:0:0:0: [sdb] Assuming drive cache: write throu<br />
kern :err : [Aug16 03:57] sd 6:0:0:0: [sdb] No Caching mode page found<br />
kern :err : [ +0.000006] sd 6:0:0:0: [sdb] Assuming drive cache: write throu<br />
<br />
(END)<br />
<br />
[rrc@Pridd ~]$ dmesg -dexHL auto -l err<br />
kern :err : [< 0.000000>] sd 6:0:0:0: [sdb] No Caching mode page found<br />
kern :err : [< 0.000004>] sd 6:0:0:0: [sdb] Assuming drive cache: write th<br />
kern :err : [< 0.003267>] sd 6:0:0:0: [sdb] No Caching mode page found<br />
kern :err : [< 0.000008>] sd 6:0:0:0: [sdb] Assuming drive cache: write th<br />
kern :err : [< 1.783254>] sd 6:0:0:0: [sdb] No Caching mode page found<br />
kern :err : [< 0.000008>] sd 6:0:0:0: [sdb] Assuming drive cache: write th<br />
kern :err : [< 174.202178>] sd 6:0:0:0: [sdb] No Caching mode page found<br />
kern :err : [< 0.000006>] sd 6:0:0:0: [sdb] Assuming drive cache: write th<br />
<br />
(END)<br />
<br />
[rrc@Pridd ~]$ dmesg -Tl err<br />
[Sat Aug 16 03:54:31 2014] sd 6:0:0:0: [sdb] No Caching mode page found<br />
[Sat Aug 16 03:54:31 2014] sd 6:0:0:0: [sdb] Assuming drive cache: write through<br />
[Sat Aug 16 03:54:31 2014] sd 6:0:0:0: [sdb] No Caching mode page found<br />
[Sat Aug 16 03:54:31 2014] sd 6:0:0:0: [sdb] Assuming drive cache: write through<br />
[Sat Aug 16 03:54:33 2014] sd 6:0:0:0: [sdb] No Caching mode page found<br />
[Sat Aug 16 03:54:33 2014] sd 6:0:0:0: [sdb] Assuming drive cache: write through<br />
[Sat Aug 16 03:57:27 2014] sd 6:0:0:0: [sdb] No Caching mode page found<br />
[Sat Aug 16 03:57:27 2014] sd 6:0:0:0: [sdb] Assuming drive cache: write through<br />
<br />
[rrc@Pridd ~]$ dmesg -tl err<br />
sd 6:0:0:0: [sdb] No Caching mode page found<br />
sd 6:0:0:0: [sdb] Assuming drive cache: write through<br />
sd 6:0:0:0: [sdb] No Caching mode page found<br />
sd 6:0:0:0: [sdb] Assuming drive cache: write through<br />
sd 6:0:0:0: [sdb] No Caching mode page found<br />
sd 6:0:0:0: [sdb] Assuming drive cache: write through<br />
sd 6:0:0:0: [sdb] No Caching mode page found<br />
sd 6:0:0:0: [sdb] Assuming drive cache: write through<br />
<br />
[rrc@Pridd ~]$ dmesg -w<br />
<br />
[rrc@Pridd ~]$ dmesg -wdexL auto -l err<br />
<br />
</syntaxhighlight><br />
<br />
[[Category:Comandos de la terminal]]</div>
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