While you could perform common management of multiple LXD containers with tools like Ansible or Puppet, in this tutorial we are going to show how to work with a simple script that runs on the host and automatically updates/upgrades all running Debian/Ubuntu-based containers. We could extend the script to perform other tasks or include updates/upgrades…
In a previous post we showed you how to upgrade Mautic from v2 to v3. In this tutorial, we will go through the steps you need to take to upgrade Mautic from v3 to v4. If you are running Mautic on a VPS or in a LXC/LXD container, it is highly recommended to take a…
PowerDNS Admin is a powerful web administration tool that we use for easily managing domain zones on our PowerDNS servers. Although PowerDNS Admin offers extensive features it lacks a “lost password” feature. So if you happen to lose your password, you are forced to reset it via the command line. In this tutorial, we’ll show…
As a Linux system administrator, it is important to know when someone logs into your server, especially as root. Unauthorized logins can cause serious security issues, as they can gain full access to the system and install unwanted and malicious software on it, among other things. Therefore, it is recommended to set up an automatic…
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….
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…
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