Create a hidden .bin folder somewhere you like. I did it on my home folder:
mkdir ~/.bin
You can add this folder to your $PATH by adding to .bashrc:
## Path
export PATH=$PATH:/home/dth/.bin
Now let’s test by adding a bash script I wrote called qdb (creates SQL DB, user and pwd)
cd ~/.bin && wget https://raw.githubusercontent.com/xdth/qdb/master/qdb
Finally, set the file as executable
chmod +x qdb
Move to another directory (e.g. cd /) and try to load the script inside the .bin folder
qdb --help
You shall see the help screen of the script. Now all other executables you add to ~/.bin will be available everywhere on your session.