Source files in a bash script
Solution 1:
Execute Shell Script Using . ./ (dot space dot slash)
While executing the shell script using “dot space dot slash”, as shown below, it will execute the script in the current shell without forking a sub shell.
$ . ./setup.bash
In other words, this executes the commands specified in the setup.bash in the current shell, and prepares the environment for you.
Solution 2:
Use dot notation to source in the script file in the current shell i.e. without creating a sub-shell:
. /opt/ros/fuerte/setup.bash
. ~/fuerte_workspace/setup.bash