How to add a directory to your PATH in Linux ( Debian based distros)

[saso9685]

I tell my question better here! I want to call the commands of a software in every terminal that I open in every directory.

this software is saved in one directory and I want to use it commands in other directories? what to do step by step to add its path to all directories as soon as I open one! plz plz plz somebody tell me¨

[saso9685]

it is not usefull at all! and this is the only video that I found ! I am a windows guy, have always been ,now I have to use it while doing my masters thesis. coz all the computers here are linux and the softwares I use! now tell me and remember that I am low iq . I have this software in one directory and I want to call itscommands thats been defined in that directory in every terminal that I open and I dont fucking undrestand why it dose not have anyinterface, What the fuck should I do? :-(