The croncal is a clever Perl script that reads entries in your crontab and outputs a schedule, showing the time when cron jobs will run. This can...

While I am on the subject of selecting time ranges from logs, a practical application presented itself. A lonely server in a far-away land...

Sometimes you need dummy folder structures populated with random data for testing your various scripts and processes - backups, file transfers, encryption, compression, etc....

Etckeeper is a handy tool that uses git to keep track of changes to anything in /etc (or any other folder you choose). It's very simple...

Below is a quick example of how to use iptables to allow port access for all types of private networks. In this case we're allowing...

This is a quick PowerCLI script that reads from a list of VM names and for each VM with network adapter type "E1000" changes...

Another simple one-liner to get a list of hostnames of all ESX servers in the vCenter. This can be useful for a number of...

This is just a quick note for me on pushing SSH keys using sshpass and xargs. The ~/hosts.txt file contains a list of remote hosts, one per...

The esxcli utility is used to interface with the vSphere and ESX hosts. It is a useful tool for getting to some basic VMWare...