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Changes your group to the default group, has the same effect as sourcing your profile/rc file (in any shell) or logging out and back in again.
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Any changes to BASH shell made in .bashrc will be active in the current terminal window from the moment you execute this command, ie. aliases, prompt settings etc. No need to restart terminal.
(In BASH 'source' simile to 'eval' lets you generally execute any bunch of commands stacked in a text file).
Simply sourcing .bashrc does not function correctly when you edit it and change an alias for a function or the other way round with the *same name*.
I therefor use this function. Prior to re-sourcing .bashrc it unsets all aliases and functions.
You may want to just use the shortcut "." instead of "source"
If you can do better, submit your command here.
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