Questions tagged [dmesg]

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63 votes
7 answers
114k views

How to convert 'dmesg' time format to 'real' time format

I have (for example) this log entry in dmesg output: [600711.395348] do_trap: 6 callbacks suppressed Is there a possibility to convert this 'dmesg' time to 'real' time to know, when this event ...
Jan Marek's user avatar
  • 2,200
1 vote
1 answer
2k views

APIC error on CPU1: 60(60) in dmesg what does it mean?

APIC error on CPU1: 60(60) in my dmesg log. What does it mean? Should I be worried! Is this some hardware issue?
B14D3's user avatar
  • 5,258
7 votes
5 answers
43k views

Linux - martian source in /var/log/messages

I keep getting these messages in /var/log/messages : Mar 8 23:17:25 saas1 kernel: martian source 169.254.1.1 from 169.254.95.118, on dev usb0 Mar 8 23:17:25 saas1 kernel: ll header: ff:ff:ff:ff:ff:...
edumike's user avatar
  • 199
1 vote
2 answers
3k views

Does this dmesg output indicate a failed network card on Red Hat Enterprise?

Having an issue with a network card on a server today. If I restart the service via "service network restart" the card never comes back, the command prompt just hangs. I suspect it's a bad network ...
Bourne's user avatar
  • 1,049
1 vote
1 answer
2k views

why dmesg | grep Memory gives two different physical memory amounts?

I am monitoring physical memory in a server I administer, and my hardware provider told me they had increased physical memory size to 4Gb... However, using several tools (free -m; top; dmesg | grep ...
Javier Novoa C.'s user avatar
2 votes
2 answers
949 views

Dmesg and cpuinfo MHz differencies

I can see different values of CPU MHz here: cat /proc/cpuinfo model name : Intel(R) Xeon(R) CPU E3110 @ 3.00GHz stepping : 6 cpu MHz : 2000.000 Model say 3GHz and cpu MHz ...
kamoks's user avatar
  • 149
52 votes
7 answers
80k views

How to add message that will be read with dmesg?

I am trying to write some custom messages in my dmesg output. I tried: logger "Hello" but this does not work. It exits without error, but no "Hello" appears int the output of: dmesg I am using a ...
calandoa's user avatar
  • 1,295
3 votes
4 answers
3k views

Is segfault signal always sent to application

My application usually crashes and prints stack to log if received segfault signal. But in some environment the 'dmesg' shows segfault messages related to my application, but application uptime is ...
noonex's user avatar
  • 248
4 votes
2 answers
4k views

dmesg SYN flood on 80 sysctl -p

I am getting a synflood on my server port 80 and i cannot stop it. first i got tables full then i disabled iptables to find out that its a synflood netstat -n | grep :80 |wc -l #returns 1300 - 2000 ...
user avatar
4 votes
4 answers
6k views

Explain the output of dmesg

I am running a Debian system, and find the output of the dmesg command very helpful. Can somebody explain to me what information is output by the dmesg command? Is it a 1:1 correlation to the kern.* ...
Brent 's user avatar
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2 votes
6 answers
12k views

Monitoring dmesg output

I find that when something goes wrong at a low level on one of my linux servers, I can see messages about it in the kernel ring buffer. These can be viewed from the command line using the dmesg ...
Brent 's user avatar
  • 23.3k
2 votes
3 answers
5k views

What are these strange entries in dmesg?

Running Ubuntu Linux 9.04, and I see these odd log lines in dmesg: [ 18.673752] type=1505 audit(1240159967.221:2): operation="profile_load" name="/usr/share/gdm/guest-session/Xsession" name2="default"...
jldugger's user avatar
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