Command: hostname explained I have seen a lot of people telling people to use the command hostname to get FQDN but almost none that have explained to junior people what the command actually does m...

This is a Junior System Administrator how to tutorial to help you download the latest nmap version. The tutorial continues on to a tutorial how to create your own yum repo that part are located he...

This is an early junior System Administrator guide: This time I will show you how to create a local yum repository that you can use in your environment. First you need to create a directory to ho...

This is an early junior System Administrator guide to install nmap security scanner. That we will use for the upcoming nmap tutorials. This is a how to that installs the old version nmap 5.51 go t...

This is a Junior Linux System Administrator how-to describing how you use nmap to scan for live devices within a network. Use nmap to scan alive hosts in the network range with the command: nmap ...

If you like to check if there is updates and what packages that you are able to get updates of you should use the command: sudo yum check-update [c-johsor@sesstl168 ~]$ yum check-update Loaded pl...

This is how you change the hostname of you CentOS or Red Hat Enterprise host. First check what the current fully qualified domain name is with the command hostname -f hostname -f Result of t...

Howto add ipranges to iptables Do you need to add an iprange to iptables? This is how you do it: iptables -A INPUT -p tcp --destination-port 9090 -m iprange --src-range 192.168.0.2-192.168.0.200...

How to change GIT push.default and why you should do it. If you are working with git you need to configure the push.default behaviour To make sure that git will not merge all my different branches...

How to create a directory with puppet If you are creating a website you need to make sure that the directories are in the remote system before you can push the files in to them this is how you do ...