Determined Server Setup
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# Determined Create User Script v2.0.3
# Written by AJ Oneal -- edited by Joshua Mudge
# Exit on any error
set -e
if [ -z "$(which openssl)" ]; then
echo "ERROR: 'openssl' is not found.";
echo "Please install openssl. It is used to generate a random password."
exit 1
if [ -z "$(grep '^PermitRootLogin prohibit-password$' /etc/ssh/sshd_config)" ] && [ -z "$(grep '^PermitRootLogin no$' /etc/ssh/sshd_config)" ] && [ -z "$(grep '^PermitRootLogin without-password$' /etc/ssh/sshd_config)" ]; then
echo "SECURITY ERROR: 'PermitRootLogin prohibit-password' is not set in /etc/ssh/sshd_config";
exit 1
if [ -z "$(grep '^PasswordAuthentication no$' /etc/ssh/sshd_config)" ]; then
echo "SECURITY ERROR: 'PasswordAuthentication no' is not set in /etc/ssh/sshd_config";
exit 1
if [ -n "$(ssh -v -o Batchmode=yes DOES_NOT_EXIST@localhost 2>/dev/null | grep password)" ]; then
echo "SECURITY ERROR: 'PasswordAuthentication no' has not taken affect. Try 'sudo service ssh restart'";
exit 1
# exit if there are any unbound variables
set -u
USER=$(basename $USER .pub)
# If they try to create root, exit.
if test $USER = "root"
echo "You cannot create the root user, it already exists."
# TODO allow optional gecos i.e. create-user.bash 'Bob Smith'
# password will be set later in the script
#adduser --disabled-password --gecos '' $USER
sudo adduser --disabled-login --gecos '' $USER
sudo adduser $USER sudo # if sudo is needed
# FAIL before getting here via set -e
sudo mkdir -p /home/$USER/.ssh
sudo chmod 700 /home/$USER/.ssh
sudo touch /home/$USER/.ssh/authorized_keys
sudo chmod 600 /home/$USER/.ssh/authorized_keys
# PRE-REQ: get the user's ssh public key and store it in
sudo bash -c "cat $ >> /home/$USER/.ssh/authorized_keys"
sudo chown $USER:$USER /home/$USER
sudo chown $USER:$USER -R /home/$USER/.ssh/
PASSWD=$(openssl rand -hex 20)
#echo "$PASSWD" | passwd "$USER" --stdin
echo "$USER:$PASSWD" | sudo chpasswd
#echo "The temporary password for '"$USER"' is '"$PASSWD"'"
sudo passwd -d $USER
echo "'$USER'" has been added with key-only authentication and a password must be set on first login
sudo chage -d 0 $USER
# Other Methods as per
# Linux
# date "+%s.%N" | md5sum
# macOS
# date "+%s.%N" | md5