Create User Without Password

adduser.sh

# create user with a disabled password
adduser myusername --disabled-password

# optionally login as them and create authorized_keys
# su - myusername
# mkdir --mode=0700 .ssh
# echo 'key' > .ssh/authorized_keys
# chmod 0600 .ssh/authorized_keys
# ^d

# optionally add them to a group, like sudo
# adduser myusername sudo

# delete the disabled password
passwd -d myusername

# force an immediate password set
chage -d 0 myusername