Prompt for confirmation
Almost all we expect users to input is [Y/n], don't we?
Do we have to read -r -p blah blah for that reason all the time? No way.
confirm puts quick yes-no prompt for you.
$ confirm && echo 'yes' || echo 'no'
Are you sure? [y/N] n
no
$ confirm -y && echo 'yes' || echo 'no'
Are you sure? [Y/n] y
yes
$ confirm 'Is it OK?' && echo 'yes' || echo 'no'
Is it OK? [y/N] y
yes$ git clone git@github.com:ernix/confirm.git
$ cd confirm
$ sudo make install
$ sudo make uninstall