githubに登録されている公開鍵でログインできるユーザーを作る

useradd_github.sh

#/bin/bash

# Usage:
# $ wget "https://gist.githubusercontent.com/aokomoriuta/e3bcbe7cb36d16a484f53555994278ec/raw/useradd_github.sh"
# $ sudo bash useradd_github.sh <username>

echo ${1}
useradd -m -s /bin/bash -p "" ${1}
gpasswd -a ${1} sudo
su ${1} -c "mkdir ~/.ssh                      \
         && chmod 700 ~/.ssh                  \
         && cd ~/.ssh                         \
         && wget https://github.com/${1}.keys \
         && mv ${1}.keys authorized_keys      \
         && chmod 600 authorized_keys"