Subnet Calculator

Published September 22, 2010

Postfix Email Queue

To check how many emails have been queuing in Postfix (an email server for Linux) and for what period of time you can […]

Published November 10, 2009

Installing Firefox 3.5 on Aspire One Linux

Acer has interwoven Firefox 2 with the rest of the system, that’s why a quite unusual approach is required to install the […]

Published December 12, 2016

Mikrotik VPN place rule before dummy rule

/ip firewall filter add chain=forward dst-address=”remoterange” src-address=”localrange” place-before=0 /ip firewall filter add chain=forward dst-address=”localrange” src-address=”remoterange” place-before=0

Published November 19, 2020

SSH Notifications via email

IP=”$(echo $SSH_CONNECTION | cut -d ” ” -f 1)”HOSTNAME=$(hostname)NOW=$(date +”%e %b %Y, %a %r”) echo ‘Someone from ‘$IP’ logged into ‘$HOSTNAME’ on […]