What is netfilter's Connection Tracking system? The connection tracking system often referenced as nf_conntrack is part of the...
If you end up with an Elasticsearch cluster which has a very different disk usage on it's nodes you...
When you synchronize directories with rsync you have to pay attention to use (or not use) trailing /. Hint
When you need to know how a BIOS screen in a Lenovo Laptop works without actually booting into the BIOS...
We have observed Lenovo laptops with nvidia graphics losing performance after they have been in use for a few minutes...
Systemd's networkd will drop IP-Addresses configured by other processes like Keepalived's VRRP, when it is restarted. This...
Getting the whole bucket size aws s3 ls s3://$BUCKETNAME/ --recursive --human-readable --summarize | tail -n2 Tail is used because...
After performing a live migration of a VM you may encounter issues with the clock of the migrated VM. The...
Important If your railscomplete-deployment uses the net-ssh-gem please ensure you use version 5.2.0 or newer to ensure...
If you have a very large datadir in MariaDB and you want to transfer the data to another host (e.g...
If you're about to handle X509 certificates and don't want to remember/google a handful of openssl commands you...
Before you continue, ensure that you've created your certificate in the region us-east-1 (N. Virginia). Otherwise...
When restoring a barman PITR backup you may encounter this error: Copying required WAL segments. EXCEPTION: {'ret': 2, 'err': '/bin/sh...
There is an issue with when restoring a PostgreSQL dump created with pg_dump < v11 with pg_restore > v10:
Unfortunately I couldn't find a complete and working documentation on how to do this. But this steps succeeded (at...
collectd5 in version 5.9.0 is broken and you upgraded it everywhere. But because it's FreeBSD it does not...
If you get e.g. this error message when you try to run puppet agent: Error: Failed to apply catalog: undefined...
Sometimes you might need to do some task in GitLab which would be tedious if you'd have to do...
This is not encouraged because this change is easily forgotten. We recommend using this only if you know what you...
If a systemd service unit is blocked by rate limiting (see in documentation) you can reset the failcounter via:
In case you're wondering, when concat-ing server certificate and intermediate certificates, the server certificate comes first.
If you have a PostgreSQL dump in the custom format you can can view the text format dump (plain SQL...
There are two ways within systemd to manage the fact that you need the gluster service active before mounting the...
If freshclam updates are failing even though the update servers are available and you find error messages like the following...