When setting up cronjobs, commands somtimes output something every time. If these commands don't support limiting their output to...
sudo gitlab-rails console Note This takes some minutes to start Send a mail Use the following...
It happens from time to time that a job in a GitLab pipeline fails. Sometimes, however, the error message is...
You can use pg_repack to do a VACUUM FULL without holding an exclusive lock during processing. There is still...
Creating Nagios Config with puppet Let's have a look at the classic way of managing Nagios configuration with exported...
A lot of web applications require being called over https, which is a good thing. It's possible to configure...
When a nginx reverse proxy complains about upstreams sending too big headers, tweaking the buffers responsibly can help to prevent...
If you want to check the configuration of a running JVM process you can use jcmd. List the running processes...
To delete a specific redis-DB you need to use the FLUSHDB-command in combination with the SELECT-command. For...
To measure the time of your HTTP request with curl, you can use the -w (--write-out) option:
We had a strange behaviour on one of our mariadb-servers: Everyday at around midnight we saw that the root...
When changing glibc versions, it's possible to end up with corrupt indexes in PostgreSQL. Are My Indexes Affected?
When changing the glibc version, it's possible that the upgrade also includes changes to how locales work.
There are cases where we have multiple exported resources that are identical. There are nodes that provide the same services...
The Oracle mysql client has an odd behavior if your server uses latin1 as default character-set-server. Command
Nginx is capable of forwarding a unix socket to UDP backend servers. This is quite handy for load balance syslog...
You might use screen or tmux to run a temporary command on a server which continues to run after the...
Instead of using Puppet exported resources you can use the puppetdb_query feature. This can result in more complex code...
If you want to expand your Areca Raid by swapping out the disks for larger ones you will need to...
Important If your railscomplete-deployment uses the net-ssh-gem please ensure you use version 5.2.0 or newer to ensure...
When restoring a barman PITR backup you may encounter this error: Copying required WAL segments. EXCEPTION: {'ret': 2, 'err': '/bin/sh...
If you get e.g. this error message when you try to run puppet agent: Error: Failed to apply catalog: undefined...
This is not encouraged because this change is easily forgotten. We recommend using this only if you know what you...
In case you're wondering, when concat-ing server certificate and intermediate certificates, the server certificate comes first.