Tag: how-to

  • Increasing content width of WordPress Twenty Seventeen

    Increasing content width of WordPress Twenty Seventeen

    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…

  • Sharing Outlook calendar with Nextcloud

    Sharing Outlook calendar with Nextcloud

    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…

  • Delete files older than

    Delete files older than

    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…

  • Require TLS for certain domains in Postfix

    Require TLS for certain domains in Postfix

    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…

  • Using blacklists with iptables

    Using blacklists with iptables

    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.…

  • Installing the VMWare View client on openSUSE 13.1

    Installing the VMWare View client on openSUSE 13.1

    If, like me, you like to use the openSUSE Linux distribution, both personally and professionally and you need to connect to a VMWare View environment, you’ll be unpleasantly surprised: there’s no supported client for openSUSE or other RPM based distributions. There is however, an Ubuntu package..