A couple of issues arise when trying to reload/source ~/.profile file. [This refers to Ubuntu linux - in some cases the details of the commands will be different]
Ad. 1)
Running this directly in terminal means that there will be no subshell created. So you can use either two commands:
source ~/.bash_profile
or
. ~/.bash_profile
In both cases this will update the environment with the contents of .profile file.
Ad 2) You can start any bash script either by calling
sh myscript.sh
or
. myscript.sh
In the first case this will create a subshell that will not affect the environment variables of your system and they will be visible only to the subshell process. After finishing the subshell command none of the exports etc. will not be applied. THIS IS A COMMON MISTAKE AND CAUSES A LOT OF DEVELOPERS TO LOSE A LOT OF TIME.
In order for your changes applied in your script to have effect for the global environment the script has to be run with
.myscript.sh
command.
In order to make sure that you script is not runned in a subshel you can use this function. (Again example is for Ubuntu shell)
#/bin/bash
preventSubshell(){
if [[ $_ != $0 ]]
then
echo "Script is being sourced"
else
echo "Script is a subshell - please run the script by invoking . script.sh command";
exit 1;
fi
}
I hope this clears some of the common misunderstandings! :D Good Luck!