Things I wish I'd Known Earlier

But learned the hard way!

CategoryStupid Linux Tricks

How to (really) Setup Bacula director on CentOS 7

Written by Tim on June 22, 2019

I’ve seen quite a few examples of “how to setup bacula on CentOS7” and they all stink. Mostly, they’re just re-warmed procedures from CentOS 6 or other distros, and they either don’t work or don’t work well. I’m interested in setting up Bacula in a disaster recovery operation. I cannot ( more… )

Posted In Stupid Linux Tricks
Tagged bacula | busines continuity | centos 7 | disaster recovery | postgresql

CMake – a short history

Written by Tim on April 8, 2019

In the Beginning, if you wanted to create an executable application in C, you’d run a program that translated C code to assembly language, run an assembler on the translated code, then run a linker to bundle it all up into an executable file. And it was Good. But it ( more… )

Posted In Better Software Design | Stupid Linux Tricks
Tagged CMake | compiling | linux

Train Wreck. How nemo-desktop trashed both my local machine and the LAN

Written by Tim on February 27, 2019

For some time now, I’ve been having problems where the power-save (suspend) feature of my desktop system has failed to put the machine to sleep. In some cases, in fact, the entire machine became black-screen unresponsive. Examination of the system logs indicated that the suspend function was failing to freeze ( more… )

Posted In Stupid Linux Tricks
Tagged linux | nemo-desktop | network | performance | power save

Creating a Functional Custom CentOS Install DVD

Written by Tim on December 18, 2018

There are several existing How-To’s out on the Internet on the subject of creating a custom CentOS installation DVD/USB storage medium. But unfortunately, actually trying to employ them can be frustrating. So here goes with Yet Another How-To that I hope will fill some of the holes. Why Custom media? ( more… )

Posted In Enterprise Java | Stupid Linux Tricks
Tagged centos 7 | createrepo | dracut hang | dvd

cloud-init “gotcha”

Written by Tim on September 30, 2015

I was putting together a project using The Foreman to spin up and manage Amazon EC2 instances and ran into a problem. I could take an AMI and launch it, but I couldn’t ssh into it. One of the major reasons why this was so was that cloud-init was silently ( more… )

Posted In Stupid Linux Tricks | The Cloud
Tagged Amazon EC2 | cloud-init | theforeman | Ubuntu

Baby Steps with OpenStack

Written by Tim on November 8, 2014

The OpenStack cloud platform is hot these days. Anyone can set up and run their own private cloud without too much difficulty. Relatively speaking. You do need a huge chunk of RAM and a respectable amount of disk space, even for a minimal cloud. Also a x64-bit hardware VM capable ( more… )

Posted In Stupid Linux Tricks
Tagged centos | cloud | openstack

The curse of the mad Puppet

Written by Tim on November 26, 2013

I have been working with various things designed to allow me to control the mousetech.com domain assets in a more centralized way. One of them was to try and use Puppet to provision machines. Puppet is a fairly nice tool, but there are some unexpected pitfalls. There are several ways ( more… )

Posted In Stupid Linux Tricks
Tagged centos | linux | linux provisioning | puppet

[SOLVED] mail loops back to me (MX problem?) for virtual machine

Written by Tim on November 26, 2013

Sometimes they just gang up on you. I was migrating my sendmail server from a NAT address to a bridge address when it all started. Xen has this really nasty habit of zapping your hardware MAC address if you don’t get the nat routing configure just right. There’s obviously some ( more… )

Posted In Stupid Linux Tricks
Tagged iptables | sendmail | Xen

Gourmet Recipe Manager problems under recent Fedora releases

Written by Tim on November 8, 2012

The Gourmet Recipe Manager program is a very useful way to store and find recipes, but it has been essentially useless since about Fedora 11 (give or take). The problem is that this app uses an SQLite database to keep its recipes and accesses the database using SQLAlchemy. Version 0.7 ( more… )

Posted In Stupid Linux Tricks
Tagged gourmet | recipe | sqlalchemy

Making Apache mod_rewrite and the ajp Tomcat connector work together

Written by Tim on November 20, 2010

Apache’s URL rewriting facility can be used to shape URLs piped to Tomcat, but it’s not as simple as it seems. The basic action is straightforward. First incoming URLs are processed by mod_rewrite, then they are matched up against JkMount definitions to find the appropriate Tomcat connector to use. The ( more… )

Posted In Enterprise Java | Stupid Linux Tricks
Tagged Apache | Connector | rewrite | Tomcat

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