Reinitialising environment variable without restart the machine
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i would rather define my "reinitialise" as make my changes to take effect in all shells at once. i found that this is quite troublesome to do the logout and logout in order to make thing works. what i am looking for is just a simple shell prompt that will make any changes (i.e. creating new environment variables) to take effect, just as what the effect of after logout and login does. are there shell prompt that will do this kind of favour?
Thanks for helps.
Ok, let me see if I understand this. You have multiple shells open. You make changes to some environment variables (either changing the values or creating new variables). Then you want all of your shells to reflect the new settings. Is that right?
Short answer: To my knowledge, no, there is no single command to update all open shells at once.
1) If you changed these environment variable values in one of your shell files (~/.bashrc, ~/.bash_profile, ~/.cshrc, or whatever), then you can re-source the file. For instance:
However, that will only update the shell you execute the command in. You will have to re-source the file in every other shell you have open for the changes to take effect. Similarly, you can source the global files in the same way ("source /etc/profile").
2) If you made these changes from the command line, then there's no way to transfer them except by typing them in to the other shells.