When you get this error message from e.g. loginctl show-user [...] after you deleted a user from your system:
What is netfilter's Connection Tracking system? The connection tracking system often referenced as nf_conntrack is part of the...
Important If your railscomplete-deployment uses the net-ssh-gem please ensure you use version 5.2.0 or newer to ensure...
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...
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...
In case you're wondering, when concat-ing server certificate and intermediate certificates, the server certificate comes first.
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...
This should not be necessary in any case and is only for special cases, for e.g. if the assets...
This card is just about creating simple PostgreSQL dumps. This is no instruction for a backup strategy nor a guide...
When receiving a new SSL-Certificate for an existing SSL-key it should be checked that they match cryptographically.
You will need to look here and find your own device. Look for the "bootable CD" download, which will give...
If you want to perform a failover on another haproxy backend server this is the way you should do it...
Brendan Gregg is the Linux performance god. Use the information in this link to find out what ways there are...
You can use proxy_hide_header in different contexts: Syntax: proxy_hide_header field; Default: — Context: http, server, location
The puppet server caches custom functions. If you edit an existing function (e.g. while you’re developing it), you’ll...
Sending a testmail from a server with a configured exim is easy as pie. From your usershell: tell exim that...
Like Railscasts or Ruby Tapas, but for Linux.
swaks is a very nice tool to test SMTP. For the most linux distributions you can easily install it with...
Install and configure the AWS Command Line Interface Show existing certificates to test if the AWS Cli is working:
I'm creating certificate requests with this command: openssl req -new -out www.example.com.csr -keyout www.example.com.key -newkey rsa:2048 -nodes
Create a 1 GB file to swap to (we have sufficient space on / on this machine. Use a different partition...