title: 'usr/bin' is not included in the path environment
body: <p>Whenever I start a new terminal and try to run a command, I get this error.
  I have found out that it can be solved with export PATH=/usr/bin:/bin, but it has to be done for each terminal I open. In the etc/environment file, the path is correct, so hence I do not understand what is wrong.(But this error appeared after I added some lines to bashrc and paths to have some shortcuts for ruby, rails , git ; ( was following a course on Coursera )).
  How can this be fixed?</p>