Create ssh user

create-ssh-user.sh

# create new user, user directory and use bash shell
sudo useradd -m $1 -s /bin/bash
# add user to sudo group
usermod -a -G sudo $1

# use root ssh key for this user
mkdir -p /home/$1/.ssh
touch /home/$1/.ssh/authorized_keys
cat ~/.ssh/authorized_keys >> /home/$1/.ssh/authorized_keys

# own user key and set permissions
chmod 700 /home/$1/.ssh
chmod 644 /home/$1/.ssh/authorized_keys
chown -R $1 /home/$1/

# check ssh login allowed
grep PubkeyAuthentication /etc/ssh/sshd_config

# set user password
passwd $1