install rclone on ubuntu code example

Example: install rclone ubuntu 20.04

# install
curl https://rclone.org/install.sh | sudo bash
# fetch and unpack
curl -O https://downloads.rclone.org/rclone-current-linux-amd64.zip
unzip rclone-current-linux-amd64.zip
cd rclone-*-linux-amd64
# copy binary file
sudo cp rclone /usr/bin/
sudo chown root:root /usr/bin/rclone
sudo chmod 755 /usr/bin/rclone
# install manpackage
sudo mkdir -p /usr/local/share/man/man1
sudo cp rclone.1 /usr/local/share/man/man1/
sudo mandb
# set up
rclone config