Cron, crontab example reference and how to run things periodically in GNU/Linux and Unix
Cron is a job scheduler found in most Unix-like operating systems. “Chronos”, which is the Greek word for “time”, is...
Fixing missing menu entries of Opera and Skype in Debian GNU/Linux
Unfortunately the third-party packages of Opera and Skype do not contain menu entries for the Debian menu system. Not very...
How to set up a SIP trunk in the Asterisk PBX
In my previous article we configured Asterisk with some SIP-devices, and created a basic dialplan so that they could dial eachother....
An introduction to Asterisk, The Open Source Telephony Project
Asterisk is software that turns an ordinary computer into a voice communications server. Asterisk is the world’s most powerful and...
GNS3: Build and configure a CCNA PPP lab using GNS3, dynamips, and vpcs
Cisco’s Packet Tracer works for very basic labs, but it has so many irritating small things that are missing, that...