you can modify the PATH environment variable in your .bashrc file and use the “source” command in order to refresh your current Bash environment.

$ sudo nano ~/.bashrc
export PATH=":$PATH"

Exit the file and source your bashrc file for the changes to be applied.

$ source ~/.bashrc
$ echo $PATH
/home/user/bin:/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/usr/games