Random musings, rambling opinions
One man's thoughts, observations and rants
Just a short post but hopefully useful to some of you. I recently switched back to openSUSE, installing openSUSE Leap 42.3 on my main system. It uses KDE Plasma as it’s default desktop environment. It looks beautiful and works well. It’s also infinitely customizable. However, is has to be said that the fonts look pretty terrible after the initial install. There’s a way of improving fonts in openSUSE 42.3, fortunately.
This will be a short post but hopefully helpful to some of you. It took me a while to get used to the new default theme in WordPress, Twenty Seventeen. I like it a lot now, with the striking visuals and large header images. There was just one problem for me: I think the content is too narrow for blog posts. It took a bit of searching but I’ve found a good way of increasing content width of WordPress Twenty Seventeen.
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I use a personal server running Nextcloud, a cloud solution to access, share and protect files, calendars, contacts, communication and more at home and in enterprise environments. There, I keep my personal calendar, which is synced to a variety of mobile devices. However, at work I am forced to use Microsoft Outlook with Exchange for my calendar and contact. To have access to my work calendar on my personal device would force me to enrol my personal device in a corporate environment. However, that would entail certain policies and restrictions I’m not comfortable with on my personal device. Fortunately, I found a way of sharing Outlook calendar with Nextcloud.
It is just one of those things that as an admin, you sometimes come across. There’s a directory somewhere that fills up with clutter. Every day, programs dump temporary files there or users upload stuff and before long, there are thousands of files of debris and cruft. How do you keep this directory neat and tidy? Easy, you just make a small script that will delete files older than x days. Continue reading “Delete files older than”
Recently, I was asked if it was possible to require Transport Layer Security (TLS) for sending email for certain domains, through a specific relay. For added complexity, the list of domains would need to be updated daily. Of course it’s possible, I said. And yes, Postfix is up to the challenge. Here’s how to require TLS for certain domains in Postfix.
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If you have any kind of system connected to the Internet, you are no doubt aware that no matter how small or unimportant it might seem, it is frequently probed, tested or subject to various attempts at abuse. These attacks come from so many malicious hosts that it is impossible to keep track by hand. So I started looking for a way to implement an automated blacklist to use with iptables. Continue reading “Using blacklists with iptables”