I decided to go the site :
Click on Download
I downloaded that .dmg, installed it, now my nmap working again.
Note : I will leave this post since, it might help others in the future.
I don't like that brew uses my GitHub credentials.
Brew is not using your GitHub credentials, you are.
Brew is just an exceptionally advanced scripting engine that allows you to download and build from source software that’s found on GitHub, Sourceforge, et al. It’s important to note that you’re not downloading from Brew, but a Brew is automating your ...
Shells remember the paths to commands you've executed during a session. You can use the hash command to manage the remembered paths (from man bash):
hash [-lr] [-p filename] [-dt] [name]
For each name, the full file name of the command is determined by searching the directories
in $PATH and remembered. If the -p option is supplied, no path search is ...
There is no way to overwrite the existing System python(s) with newer versions. (Catalina comes with a version of python3.)
The command pip3 will specify that you want to install modules to python3.
python2 will of course continue to work after 1st Jan, and many people still have lots of scripts that they will continue to run.
Trying to debug Apache issues on any computer can be difficult, but you just have to know what commands and files to look at. First, try to start Apache using the apachectl command and look for errors written to the screen.
$ sudo apachectl start
If there is an error in the apache conf files or some system issue, you may see it there.
Also, you need ...
You have two versions because one is command-line and the other is a Graphical User Interface (GUI). You can check their versions with the commands below. I use libreoffice as octave is no longer a cask:
$ brew info octave
octave: stable 5.1.0 (bottled), HEAD
High-level interpreted language for numerical computing