Static IPs are typically only used on servers. Remembering how to set it up has always been so-so as it's done only once when setting up the server the first time.
I've not use Centos much before I started working for my current employer. There we use it constantly though, alongside windows server, and I got into checking it out for my own setup as well.
As I have grown weary of updating wordpress all the time I have decided to move my blog to static html instead.
I am using jekyll to archive this and am using a home made theme. If you haven’t tried Jekyll yet, I suggest you do. It’s pretty easy to setup but of course takes a more manual approach and it requires you to re-upload files when they are changed.
This is rather handy if you're not sure of the case of the starting letter of a program you wish to expand to using tab completion.
All that is needed is that the following line is present in either ~/.inputrc or /etc/inputrc
set completion-ignore-case on
Here are a few ways to list open ports in the linux terminal.
First we'll try lsof.
As I always forget which switches to use on tar I made this little note.
A quick reminder to myself on rsync usage
For a long time I have been using bind as a LAN DNS server. Just for my local server setup, so that I can use hostnames instead of IP addresses. I found the hosts file to be a bit low-tech, and it was a good chance to learn a little about DNS along the way. :-)
A short while ago I was watching the Linux Action Show, where the Pi-hole system was introduced. Now being able to block ads before they are even entering the network (or more correctly before they are requested) seems like a super idea to me. So I started reading up on the requirements.
Ever notice how many braindead people try to break into your email server? It's a daily battle to stay ahead of them. Especially when, like in my case, fail2ban just... well... fails... :-)
For some time I have just manually added IP addresses to my iptables array. The list gets kind of long after a while though. See the following for what I did. And then imagine a lot of these lines.
iptables -A INPUT -s <ip>/<cidr> -p tcp -m tcp --dport 25 -j DROP
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