journalctl.txt

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Creation-Date: 2016-12-04T17:31:19+01:00

====== journalctl ======
Created søndag 04 december 2016

**The Journalctl is Arch's logging journal. **

===== Usage =====
**# A few ways to invoke the Journal**

== Select boot ==
**# You can select which boot you've like to see information from. **
$ journalct -b

**# **//-b//** is the same as **//-b -0//
**# To show from previous boot, use **//-b -1//
**# And the second previous, **//-b -2//
**# etc etc.**

== Show end of the Jourmal ==
**# Use **//-x//** to view the latest entries in the journal**
$ journalctl -xb

== Display since .. minutes ==
**# Ex to display all messages within the last 20 minutes**
$ journalctl --since "20 min ago"

== Follow new messages ==
**# To follow the journal for new entries**
$ journalctl -f


===== Tips and Tricks =====
**# Some random Tips and Tricks**

== Wordwrap the output of journalctl ==
**# By default, journalctl truncates the text (off the terminal display) **
**#** **You can instead make it wordwrap the output**
$ SYSTEMD_LESS=FRSXMK journalctl

== Reduce log size ==
**# We don't want our log to take 5% disc-space. **
**#** **Edit **///etc/systemd/journald.conf//**, uncomment and set the **//SystemMaxUse//
{{{code: lang="texinfo" linenumbers="True"
SystemMaxUse=50M
}}}
 

**# Then reduce the current journal to 50M**
$ journalctl --vacuum-size=50M