Tutorials/Tips

Bash susceptible to environment variables code injection attack

Bash susceptible to environment variables code injection attack

A security adversary posted at Red Hat’s security blog and referenced at US-CERT has warned users of the Bash shell of a “specially-crafted environment variables code injection attack.” That means UNIX-based operating systems that use the Bash shell are affected. That includes all Linux distributions and Apple’s Mac OS X. According to the blog post cited above: … the vulnerability […]

September 25, 2014 · 6 comments · Tutorials/Tips
DevAssistant: A developer’s best friend

DevAssistant: A developer’s best friend

One application I came across while testing an installation of the main edition Fedora 21 alpha is DevAssistant. (See Fedora 21 Workstation: GNOME 3. KDE and Anaconda screenshots.) DevAssistant automates the process of setting up development environments for a few of the most popular programming languages and development frameworks. Languages supported are shown in the screenshot below. Just after a […]

September 24, 2014 · 0 comments · Fedora, Tutorials/Tips
How to set up a 3-node CoreOS cluster, just for fun

How to set up a 3-node CoreOS cluster, just for fun

“CoreOS is a new Linux distribution that has been rearchitected to provide features needed to run modern infrastructure stacks.” That’s geek-speak for a Linux distribution that makes it (not-so-) super easy to run fun things like Linux containers and containerized applications on commodity hardware. That’s one of the trending things in the business, and it’s the kind of stuff I […]

September 19, 2014 · 0 comments · Tutorials/Tips
How to install Oracle JRE on Fedora 20 and use alternatives to switch between it and OpenJDK

How to install Oracle JRE on Fedora 20 and use alternatives to switch between it and OpenJDK

All the Java components installed on Fedora (20) are provided by OpenJDK (Open Java Development Kit), a Free Software implementation of Java SE (Standard Edition). It’s all you’ll need except when you have to install an application that requires Oracle JRE (Java Runtime Environment). One such application is the community edition of Datastax Cassandra, a NoSQL database. I thought I […]

September 19, 2014 · 0 comments · Tutorials/Tips
How to extend, grow or resize an LVM logical volume

How to extend, grow or resize an LVM logical volume

This short tutorial shows how to resize an LVM logical volume. WARNING: Do not reduce the size of an active logical volume. It is the easiest way to lose you data. Recovery is possible, but it can be an involved process. Use this just as a guide on how to grow an LVM logical volume. The screenshots you see in […]

September 6, 2014 · 0 comments · Tutorials/Tips
Upgrade Ubuntu 12.04 server to 14.04

Upgrade Ubuntu 12.04 server to 14.04

‘Tis the season for upgrading. First was upgrading OSSEC from 2.7 to 2.8, see Upgrading OSSEC 2.7 to 2.8 and the bro-ids rule issue. Now’s the time to upgrade the server that OSSEC was protecting. Before the upgrade, the server was running Ubuntu 12.04 LTS. It was upgraded to Ubuntu 14.04 LTS less than an hour ago. Here’s how I […]

August 22, 2014 · 0 comments · Tutorials/Tips, Ubuntu