I have a centos7 base ami and have successfully changed the user name using the ec2-launch user data modified from an amazon-linux script
#!/bin/bash groupadd ec2-user usermod -d /home/ec2-user -m -g ec2-user -l ec2-user centos echo "" | sudo tee -a /etc/sudoers echo "Defaults:root !requiretty" | sudo tee -a /etc/sudoers echo "ec2-user ALL=(ALL) NOPASSWD: ALL" | sudo tee -a /etc/sudoers echo "Defaults:ec2-user !requiretty" | sudo tee -a /etc/sudoers
log in works as expected and home directory has been changed, however when I use sudo it still asks for a password. As I cannot get into the file to check format I wonder if I am using the correct syntax?
How do change the user and remove the sudo password requirement in a single script?
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Answer
I believe your Cloudinit userdata script is failing because it’s attempting to use sudo without a tty (and the !requiretty hasn’t been added yet). Since that script runs as root anyways, this should work:
#!/bin/bash groupadd ec2-user usermod -d /home/ec2-user -m -g ec2-user -l ec2-user centos echo "" | tee -a /etc/sudoers echo "Defaults:root !requiretty" | tee -a /etc/sudoers echo "ec2-user ALL=(ALL) NOPASSWD: ALL" | tee -a /etc/sudoers echo "Defaults:ec2-user !requiretty" | tee -a /etc/sudoers