If you run a recent vintage of Ubuntu, you may encounter the following dpkg error when you’re trying to update or install packages. This is usually caused by Ubuntu simultaneously running another instance of the package manager, often on system startup. Still, it can be annoying when you’re trying to update your system. So you […]
This article details how to install and use rkhunter, the Rootkit Hunter anti-rootkit utility, on Ubuntu Server 16.04. Install and Update rkhunter Run a Scan If you don’t want to see all the checks, you can print only the warnings and positives instead: Interpreting the Results In this case, /usr/bin/wp is an installation of WP-CLI. […]
ufw, or the Uncomplicated Firewall, is a convenient front end for managing iptables on your Ubuntu server. This article provides a brief tutorial on some of the most commonly used commands. ufw is available in Ubuntu from the 8.04 release onward, and the commands here should apply to any current version. Viewing the ufw Status […]
My previous instructions for setting up a Postfix/Dovecot/MySQL mail server on Ubuntu 12.04 work mostly as-is for Ubuntu 16.04, but there are a couple of gotchas. These workarounds are necessary due to some different locations of utilities on the filesystem and some changes to Ubuntu’s internals. We’ll go through these differences one by one. Mail […]
Summary: how to diagnose and eliminate the xmlrpc.php WordPress exploit when it’s clobbering your web server. You’ve been running a public Ubuntu 12+ and Apache/LAMP web server for a while now. Until recently everything has worked fine, but suddenly your server is struggling to display even static pages. Sometimes content takes forever to load, and […]
As mentioned in my older article on the subject, for many years Nginx had no hook for dynamically adding new modules, which meant having to recompile Nginx to add functionality. But the Nginx company has worked to address that issue: as of version 1.9.11, Nginx supports dynamic module loading. Still, there may be cases where […]
So you want to install Nginx from source on Ubuntu. However, you want Nginx to work like you had installed it with the package manager. This means the startup file (/etc/init.d/nginx), binary (/usr/sbin/nginx), config directory (/etc/nginx/) and log files (/var/log/nginx/) will all be found in the usual Debian/Ubuntu locations. Fortunately this is pretty easy to […]
This article describes how to install the latest open source OTRS help desk system on an Ubuntu 16.04 server. If you’ve used my previous article, the procedure is little changed from before, but some of the specific commands are different. As of this writing, the current version of OTRS is 5.0.11, and I’m starting with […]
Previously I discussed how to install Drush 6.x for use with Drupal 7. Here we’ll install Drush 8 for Drupal 8, specifically using Ubuntu 16.04 Server. The recommended method is to install using PHP’s Composer. First we install Composer itself: Then, install unzip to speed things up: Installing and Testing Drush 8 Install Drush 8.x: […]
As mentioned in my Ubuntu 16.04 and Drupal 7 article, the Ubuntu 16 LTS version has some nice upgrades, including PHP 7, MySQL 5.7, Nginx 1.10, Apache 2.4.18, and MariaDB 10.0.x. Let’s see if we can make it work with Nginx, PHP-FPM, MariaDB, and Drupal 8, using the Redis key-value store as the backend cache […]