A collection of system administration hints and tips, tricks and articles for the Linux operating system in all its variants.

Latest posts

client_loop: send disconnect: Broken pipe

Whilst its an annoyance, this message is harmless. Here we show three examples of how you can overcome this issue.

Setting up an SSHD failover daemon in Ubuntu

A simple article on how to create a failover SSH server on a Ubuntu system, allowing you to connect on an alternative port of the original SSHD fails

A simple vagrant Cheat Sheet

Vagrant is a tool for building and managing virtual machine environments in a single workflow. With an easy-to-use workflow and focus on automation.

Clearing Linux memory cache and swap

Every Linux system has three options when clearing cache without interrupting any processes or application services.

Forcing RHEL to prompt for password in Single User mode

By default, RHEL doesn't prompt for a password and we are given root shell directly, as usually Single User mode can be used to reset root password.

Clearing GPG BADSIG errors during update

During a test build of Ubuntu 15.10 I suddenly received the following error when refreshing the packages from the repository.

What are access control lists (ACLs)?

Access control lists (ACLs) allow you to assign permissions to many different users and groups on individual files or directories.