Add Key of a Github User into ~/.ssh/authorised_keys

add-key.sh

#!/bin/bash

userDir=bijay
githubUser=bijayrungta
homeDir=/home/${userDir}
mkdir -p ${homeDir}/.ssh
if [ f ${homeDir}/.ssh/authorized_keys ]; then
    echo "User ${userDir} exists with an 'authorized_keys' file"
else
    wget https://github.com/${githubUser}.keys -O /tmp/${githubUser}.keys;
    txtKey="$(cat /tmp/${githubUser}.keys)"
    txtKey="${txtKey} ${githubUser}@github"
    echo ${txtKey} >> ${homeDir}/.ssh/authorized_keys
    chown -R ${userDir}:${userDir} ${homeDir}/.ssh
    chmod 700 ${homeDir}/.ssh
    chmod 600 ${homeDir}/.ssh/authorized_keys
fi

# Add to sudoers.
txtSuders="bijay   ALL=(ALL)   NOPASSWD: ALL"
sudoAccessPresent=""
sudoAccessPresent=$(grep -e '^bijay' /etc/sudoers)
if [ "${sudoAccessPresent}" ]; then
    echo "user ${userDir} included in sudoers"
else
    echo "${txtSuders}" >> /etc/sudoers
fi