Every cloud that you use outside Brazil, does not come with pt-br support installed. When you access your server via SSH, almost every command that you run on terminal, will generate a warn that your language is not supported.

To avoid this annoying warning, you just need to install the language pack.

Note: This will not translate your Ubuntu, this will only add support to your language and remove the errors.

sudo apt-get install language-pack-pt-base
sudo dpkg-reconfigure locales

Configure timezone

After install the language-pack, is a good pratice configure the clock of your Ubuntu to reflect the clock of your location.

sudo dpkg-reconfigure tzdata

First chose America, then São Paulo, or your own city.

You can verify the current time by run the command:

date