You might want to try this:
For Anaconda 2:
export PATH=~/anaconda2/bin:$PATH
For Anaconda 3:
export PATH=~/anaconda3/bin:$PATH
For Anaconda 4:
Use the Anaconda Prompt.
And then
conda --version
to confirm that it worked.
The export PATH=~/anaconda3/bin:$PATH works, but it stops when you exit the terminal in order change that you have to run sudo nano ~/.bashrc and then copy the path into the file and save it after that you activate the changes using source .bashrc.
Check with conda install anaconda-navigator
. If not installed, follow the Anaconda install instructions again
Follow along with the video https://youtu.be/Pr25JlaXhpc.