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To upgrade all the python packages that was installed using pip you can use this following command: sudo pip freeze --local | grep -v '^\-e' | cut -d = -f 1  | xargs -n1 sudo pip install -U

You can use the -N parameter to overwrite existing files when downloading with wget. For example: wget -N https://www.dangtrinh.com/afile.txt

In Odoo 11, if your user cannot see other users in the Users dashboard (http://your.domain.com/web?&debug=#view_type=list&model=res.users&menu_id=67&action=65), make sure you uncheck the " Portal " and " Public " in the Other Extra Rights section in that user's setting: