One way to create a backup of a MySQL database on the shell is to use the mysqldump command. Mysqldump…

Fail2ban uses iptables by default to block incoming connections when they exceed the max.  login retries. The iptables rules used…

Debian 10 has now fully switched to Systemd which means that the traditional commands to halt or reboot a system…

This short guide shows you how to add a newline into a file by using the echo command on the…

If all your visitors shall access your website with a URL like www.domain.com and not without www, use the following…

This tutorial explains how to change your DNSSEC algorithm for a DNS zone managed by ISPConfig 3. In this case,…

When a server has more than one IP address, then postfix will use all IP addresses randomly to send out…

The winmail.dat file is a container file format used by Microsoft Outlook to send attachments in rich-text formatted emails. To…

If you use postfix and / or amavisd-new on the mail server, you can use the following recipes to block…

Sometimes you might have to work with the Spamassin Bayes Token database. This is the database that is used by…