Root Run Problem

Newbie
#1

I installed root and wrote source home/usrname/Downloads/root/bin/thisroot.sh in terminal. it was run.
But i run root again

username@Ubuntu-IP:~$ root

Command 'root' not found, did you mean:

  command 'rootv' from deb xawtv (3.106-1)
  command 'toot' from deb toot (0.25.2-1)
  command 'proot' from deb proot (5.1.0-1.3)
  command 'rott' from deb rott (1.1.2+svn287-3)

Try: sudo apt install <deb name>

How do i fix this problem ?

#2

Installing ROOT

#3

Can you explain how you did it ?

#4

I installed all required dependencies and downloaded binary distribution. Then unpack the archive (tar -xzvf root_v6.22.00.Linux-ubuntu19-x86_64-gcc9.2.tar.gz) finally source the root (source root/bin/thisroot.sh).
After these steps i wrote root in terminal, it was worked but when i was wrote root other terminal, i saw this ;

username@Ubuntu-IP:~$ root

Command 'root' not found, did you mean:

  command 'rootv' from deb xawtv (3.106-1)
  command 'toot' from deb toot (0.25.2-1)
  command 'proot' from deb proot (5.1.0-1.3)
  command 'rott' from deb rott (1.1.2+svn287-3)

Try: sudo apt install <deb name>

do i have to source thisroot.sh whenever i need to use root ?

#5

Installing ROOT → Download a pre-compiled binary distribution:

To avoid having to source thisroot.sh every time one needs to use ROOT, it is typical to add the instruction to .bashrc, .profile or analogous configuration files. Note, however, that sourcing thisroot.sh might interfere with ROOT versions installed with different methods.

#6

How do I add the command to configuration files ?

#7

With your favorite text editor (vi, emacs …)