A new client recently asked to upgrade a still functioning Mautic 2.15.3 running on Ubuntu 18.04 to the latest Mautic v3. In this guide, we will look at how this can be achieved and what to look out for. If you are running Mautic on a VPS or in a LXC/LXD container, it is highly…
Until recently, we were still running a number of legacy LXC containers, which for years performed important mission-critical tasks very stably and with no significant problems. However, we decided to convert them to LXD containers to create a more homogeneous server environment and to simplify management. Switching to LXD also means more functionality and the…
By default Ubuntu SSH root login is disabled and root password has not been set. However, many system administrators prefer to work as root to avoid having to use “sudo” for almost every command and enter passwords over and over again. To allow root login over SSH we first need to set the root password…
Although OpenLiteSpeed (OLS) can work well with Redis or Memcached for object caching, it is recommended to use LiteSpeed Memcached (LSMCD), which was developed specifically for OLS and guarantees the best performance. LSMCD is unfortunately not available as a package for Ubuntu/Debian nor for CentOS/RHEL and thus will have to be compiled and installed manually….
Migrating a PowerDNS slave server with a new IP address can be tricky, so proper preparation is essential. Update the System and Install Required Packages Create a MySQL Database and User for PowerDNS Disable systemd-resolved and Configure Custom DNS Install and Configure PowerDNS You should see the PowerDNS service running. You should see the UDP…
To send mail messages from a Linux server, you need to install an MTA to take care of this task. If you don’t want to use a full MTA like Postfix or Sendmail, sSMTP is a good lightweight alternative that is easy to install and configure. However, you do need a relay SMTP server to…
ZFS on Linux is without a doubt one of the most robust and powerful file systems available today. However, despite its high reliability, unexpected problems can occur quickly, especially with the underlying hardware. It is important that any error is immediately noticed and reported to the responsible system administrator, who can then intervene in time…
A checksum is a string of numbers and letters used to verify that a copy of a file is identical to the original. For example, a binary file (especially a software program that has been downloaded) can be checked for errors before it is installed. If you know the checksum of an original file, you…
By default the mdadm will monitor all MD (multi-disk) arrays on your system and will send a message to the root user whenever a problem occurs. Obviously, we want these messages to be sent by email to the system administrator, so we need a MTA (Message Transfer Agent) to send the mail from our system…
By default, a new LXD container is assigned a dynamic IPv4 address by the internal LXD DHCP server. However, in many cases it is necessary to assign a static IP address, for example to make a web server available on a separate container behind a proxy server running on another container on the same host,…
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