Tag: Systemd

journalctl command to see kernel messages

Sometimes, there are just too many messages in journalctl output and it becomes a mystery game to search for the messages you are looking for. But luckily you do not need to use grep to find the right message. Here is example of what I had to do when I was looking for kernel messages.

journalctl _TRANSPORT=kernel
# To see all the fields, you can use the verbose mode
journalctl _TRANSPORT=kernel -o verbose

# And the filter on priority if needed to get the messages you need
journalctl _TRANSPORT=kernel PRIORITY=4

# and follow
journalctl _TRANSPORT=kernel PRIORITY=4 -f -l

PID File for squid in Fedora – 21 ( Fedora.next)

So, the other day, I wanted to have squid store its pid in the regular ‘var/run’ directory. Good simple enough – just add the following to “/etc/squid/squid.conf” :

pid_filename /var/run/squid/squid.pid

and create the /var/run/squid directory. Simple, hold on not so fast. Reboot and psssst.. ‘/var/run/squid’ is gone. Finally found that /var/run is handled by systemd-tmpfiles and thus you need to do this as well:

cat <>/lib/tmpfiles.d/squid.conf
d /run/squid 700 squid squid
EOF

So, basically you need to tell tmpfiles to create the squid directory as well.. How complicated things are becoming 🙂

get systemd journal entries on web interface.

Just in case you need it, you can get the journalctl entries from systemd in the web page.

First install :

yum install systemd-journal-gateway

Once you have done this you can get the journal entries with wget as well with

wget http://localhost:19531/entries

or if you prefer, you can browse with a browser at http://localhost:19531/. It has a nice little interface for browsing the entries, nothing too fancy but just sufficient.

 

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