Dsabling SElinux In Centos

Sometimes and with some DB platforms especially when you are testing and want to reduce the number of variables during development, testing etc.. you don not want SELinux watching your back. While it is a must to enable SELinux in hardened production systems it can be quite a pain to handle. Sometimes it needs disabling…

Slash notation lookup table

Total-addresses: how many unique addresses can be represented. To determine how many are available to be assigned to devices you need to subtract 2 from the provided number to allow for the ‘network’ and ‘broadcast’ address. A further one of these may need to be assigned to a router. Net bits Subnet mask Total-addresses /20 255.255.240.0 4096 /21…

The Linux Conundrum

A large company, was taking over our smaller company and they were on a trend to replace Linux and Java with MS Windows  ®  and ASP.NET. When the CIO was asked why not go the other way since arguably our smaller company was more advanced put plainly his answer “Linux and Java guys are so hard…