The standard procedure for creating a Secure Shell public/private key pair for UNIX-based systems (including Linux and macOS) follows. For information on additional options, see ssh-keygen.- Open your favourite terminal application- Run the key generation program:ssh-keygen -t rsaGenerating public/p...

Most system administration guides advise disabling password authentication in favour of key-based authentication. While this is a good base-line, given the poor choices in password selection, there are some occasions where password authentication is essential, but these should be managed with person...

You can download the current version of macOS via the Mac App Store, and older ones via these links:macOS CatalinamacOS MojavemacOS High SierramacOS SierraOS X El CapitanOS X YosemiteIf, however, you find that you're unable to download using Software Update (with an error "Update not ...

There are a number of ways that people can get information from your organisation in order to launch a phishing attack against you, or to impersonate you whilst phishing someone else.The simplest way of getting this information is to do a search on a search engine like this one. A threat actor can m...

There's an inferred understanding that you need to include your email address on your website so that you can easily be contacted by customers, service providers or other visitors to your website.Just like having a front door and windows on your home is necessary, each entry point becomes a security...