sincere thanks Gottfrieda good explanation is always useful, also for others who will look in the history.
Am 24.10.22 um 14:40 schrieb Tobias Geerinckx-Rice:
Hi Gottfried,I hope this strikes the right balance between explaining ‘environment variables’ from scratch and answering your immediate question.Gottfried 写道:1. Will this now overwrite my variables for ever, or only for some time?Environment variables are not saved. They can be *set* by configuration files, such at /etc/profile, but these files are not updated when you type ‘export GUIX=awesome’ on the command line.Setting LC_ALL like this affects your current shell, and it will be inherited by child processes (hence why the ‘guix’ child will speak English after setting LC_ALL=C in the parent shell), but they exist purely in RAM for the lifetime of each process.The also do not propagate to ancestor or sibling processes: setting LC_ALL in one terminal window has no effect on any other windows. Nor will setting LC_ALL in a shell affect new processes you launch elsewhere, such as from your desktop menu. Only child processes launched in the same shell/window will inherit it.As soon as you close that terminal, type ‘exit’ in the (guix) shell, or trip over your power cable, the setting is gone.2. How can I set it back to my original state?Environment variables have no built-in notion of history, or defaults. They are just variables, and setting them to something new overwrites the old value (if any).So: ~$ echo $LC_ALL # yours will be de_DE, I presume en_IE.utf8 ~$ LC_OLD=$LC_ALL # save the old value ~$ export LC_ALL=C # in with the new ~$ echo $LC_ALL # do the thing C ~$ LC_ALL=$LC_OLD # restore the old valueBut really, in practice, I'd just close the window/shell once done… they are so cheap.Kind regards, T G-R
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