If you use BIND as your domain name server, it shows by default the installed version. There is a possibility to suppress this bad behaviour| www.unixfu.ch
How to verify the certificate of a mailserver with openssl from the command line.| www.unixfu.ch
The string size limitation of 255 bytes can hurt you with SPF records or DKIM records. In this case you have to split the string size of your DKIM record.| www.unixfu.ch
Using built in tools on the Mac gives you a list with all applications listening on network ports.| www.unixfu.ch
Building a local centos repository mirror helps you to simplify updates of you internal servers, if Internet access for these servers is blocked.| www.unixfu.ch
Using an Apple keyboard with Linux makes you finding your special keys. Use dpkg-reconfigure keyboard-configuration and it behaves in Linux Apple like| www.unixfu.ch
By default a FortiGate automatically saves the configuration after each change. It is possible to modify this behaviour to config save revert| www.unixfu.ch
Telnet was used for a very long time to debug network connections. Since telnet is not available on Apple anymore, netcat is a true alternative| www.unixfu.ch
You are the owner of a MacBook Pro with Touch ID. In this case you can authenticate yourself in sudo using your fingerprint and Touch ID.| www.unixfu.ch