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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.
There is 1 alternative - vote for the best!
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).
You may want to just use the shortcut "." instead of "source"
If you can do better, submit your command here.
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