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How to include systemlogs in your post?

by joekamprad ( taken over from Antergos and expanding it)

In the majority of cases, simply describing your issue will not provide enough information for someone to identify its cause and advise you on how to resolve it. It is important to include any system logs that may be relevant to your issue to ensure that neither your time nor the other person’s time is wasted. The following is a list of the most common system logs and where/how to obtain them. The logs are listed in order of importance.

Essential: we need to be able to reproduce the issue, so exact steps are needed.

These two outputs from your system should be inclöuded in most cases if you want help on a specific system/hardware related issue:

Hardware information:

inxi -Fxxc0z --no-host | eos-sendlog

Boot log:

journalctl -b -0 | eos-sendlog

run the commands and share the short-url in your post.

It will show like so in your terminal:

terminal output of pastebin tool

Info on different logs and tools you can use to fetch and share system information:

Systemd Journal:

The systemd journal can only be accessed using the journalctl command. You can export your system’s journal from the last three boots using these command:

journalctl -b -0 > /tmp/journal

journalctl -b -1 > /tmp/journal.last

journalctl -b -2 > /tmp/journal.2last

(-0 = last boot -1 the boot before last and -2 … )

Now you can open the 3 files under /tmp with any text editor. Most interesting one is the last boot in most cases.,

If you want them posted into the forum you can just Pastebin them:

journalctl -b -0 | curl -F 'f:1=<-' ix.io

Learn more about the Pastebin command further down.

Note that EndeavourOS has a simpler way to Pastebin. For example:

cat /tmp/journal | eos-sendlog

Program eos-sendlog will (by default) save the received URLs to ~/.config/eos-sendlog.txt for later inspection.

Xsession:

Your session log is located in your /home directory:

~/.xsession-errors

~/.xsession-errors.old

Xorg (X11):

You can find your Xorg logs here:

/var/log/Xorg.0.log

/var/log/Xorg.0.log.old

Lightdm:

LightDM’s logs can be found here:

/var/log/lightdm/lightdm.log

/var/log/lightdm/x-0-greeter.log

Other log providers and options:

journalctl --since "10 minutes ago"

To get the journal from a given timespan (works also with hours seconds, days)

For problems after new installation:

installer (calamares) log is saved inside home folder of the live user: /home/liveuser/endeavour-install.log you can send this to Pastebin like this from a terminal:

cat ~/endeavour-install.log | eos-sendlog

After the command sends the logfile it gives out a short URL looking like this one:

http://ix.io/1Rmn

The install log is also stored on installed system:

cat /var/log/endeavour-install.log | curl -F 'f:1=<-' ix.io

A good way to get information about a particular program:

journalctl -f /usr/bin/"Executable"

And nice to post a Pastebin the smart way:

"command" | curl -F 'f:1=<-' ix.io

or using eos tools:

"command" | eos-sendlog

System summary and boot log example:

lspci > log.txt && lsusb >> log.txt && journalctl -b -0 >> log.txt && cat log.txt | curl -F 'f:1=<-' ix.io

Or use eos-sendlog:

lspci > log.txt && lsusb >> log.txt && journalctl -b -0 >> log.txt && cat log.txt | eos-sendlog

Program eos-log-tool is a GUI for various logs and system files.

Other systemd logs/analyze:

systemd-analyze blame

will show times of systemd stuff needed to proceed on bootup

https://www.freedesktop.org/software/systemd/man/systemd-analyze.html

Pastebinit:

install pastebinit with package manager or sudo pacman -S pastebinit

the command should be passed like this:

journalctl -b -0 > ~/journal.txt && pastebinit -i ~/journal.txt -b lpaste.net

where you can change journalctl -b -0 with any other command like dmesg from below, his will write to a txt file: ~/journal.txt under your home you can change this name (journal) to something related to the command you pass..

pastebinit will auto-upload this to the Pastebin service you can choose (list all available by pastebinit -l

then it gives the link to it as output, so that you can just copy t to paste inside a post.

System summary and boot-journal example:

lspci > log.txt && lsusb >> log.txt && journalctl -b -0 >> log.txt && pastebinit -i log.txt -b lpaste.net

This will give out a link (like this:http://lpaste.net/7802695579456241664) you can post onto the forum, this will include all the output of:

lspci (list your pci devices) lsusb (same for USB) and dmesg (bootup messages) and make it available.

The dmesg command:

An alternative to the above command (or if your system is not using systemd) is the good old dmesg command. This is potentially less informative than journalctl above, but not if you have filtered it as I advised you to. So they are essentially equivalent.

sudo dmesg

Again, If you look in its man page or type invoke dmesg --help you’ll learn about the always useful -l flag, which filters dmesg potentially long output to print only certain message levels. And the -r flag which prints the message level. So, likewise many of us will thank you if you do the following instead of the above:

sudo dmesg -rl warn,err,crit

Or at the very least:

sudo dmesg -r

Trivia: The dmesg command is basically the same as journalctl with the -k flag added to it

Hardware Information Systems:

INXI: smxi.org

inxi -Fxxc0z --no-host

Or to autopastebin it and get an URL to post:

inxi -Fxxc0z --no-host | curl -F 'f:1=<-' ix.io

inxi -Fxxc0z --no-host | eos-sendlog if you use eos-tools

EndeavourOS log tool

We also have a GUI app to handle logs which will come in handy if you are not that firm on using all the commands from terminal:

After selecting the logs you want to share it will create the log and Pastebin this for you so that you easily can share this URL on the Forum or in the Helpchat:

Final Note:

Very important! Do not paste only the printed contents of the command.

Always show also the command you used to get that output.

And better to use an external Pastebin if the output is very large because it is hard to get the overall question visible, inside your post, or for the discussion, if it is interrupted by large logs!

At the Forum you can use also the summary option to hide the text/log itself and instead show an arrow to open it:

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How to include systemlogs in your post.

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