Fix LC_CTYPE warning message in Oracle Linux

This article is for future me.

Are you annoyed by this warning in Oracle Linux (or CentOS)?

/etc/profile.d/lang.sh: line 19: warning: setlocale: LC_CTYPE: cannot change locale (UTF-8): No such file or directory

Run this “one-liner” to fix this error message:

echo $'LANG=en_US.utf-8\nLC_ALL=en_US.utf-8' | sudo tee /etc/environment

That’s it.

Manual steps

If the one-liner does not work for you, try the steps below:

1. Run vi /etc/environment
2. Enter the following content:

LANG=en_US.utf-8
LC_ALL=en_US.utf-8

1. Save and exit
2. sudo reboot