Category: System Administration

What is DKIM?

DKIM is short for Domain Keys Identified Mail and is an internet standard, that ensures, that an email is in fact authorized by the owner of the domain, and, that its content is authentic and has not been modified. DKIM is available for FreeBSD as the OpenDKIM package or port. OpenDKIM is a milter for Sendmail, which is the default mail server in FreeBSD.

The default audio device in FreeBSD can be set with the utility sysctl on the command line. This means default microphone input and default sound output. Note, that setting the default audio device in FreeBSD is different from setting the Output Device in Sound in GNOME, which only affects a few applications, such as Firefox.

Review of Havit KB496L RGB backlit mechanical keyboard for FreeBSD desktop computers and Android smartphones.

In this example, a FreeBSD bootable USB memory stick will be prepared, so it can be used to boot a computer and install FreeBSD on it.

FreeDOS is a free and open source operating system variant of the classic MSDOS from the 90’s, just like DRDOS and PCDOS from the time. FreeDOS can be used to run legacy business software and classic games for MSDOS. In this example, FreeDOS 1.3 is installed as a guest in VirtualBox 6.1 on a FreeBSD 13.2 desktop computer.

In this example, the VirtualBox kernel module 6.1.36_1 for VirtualBox 6.1.36_1 on FreeBSD 13.2 is installed from ports to a fix version mismatch.

This is the procedure, with examples in FreeBSD, for how to create a virtual host in Apache HTTP server, including, how to create a seperate system user account, create the document root directory, setting permissions and constructing the virtual host configuration in Apache.