Unable to run ruby script over ssh into ec2 instance

Question

I'm working with ec2 instances and was trying to execute a ruby script on another instance after ssh to that instance. I have a ruby script which updates configuration files, so i need to run that script as super user. when i run the script manually on that instance, sudo ruby recreate-532d01c.rb , the error that comes is

sudo: ruby: command not found

Running simple scripts with no root permissions works, eg. ruby file_1.rb .

Using rvmsudo in place of sudo executes the script with warning,

ubuntu@ip-10-0-0-111:~$ rvmsudo ruby recreate-82bb000012.rb 
Warning: can not check `/etc/sudoers` for `secure_path`, falling back to call via `/usr/bin/env`, this breaks rules from `/etc/sudoers`. Run:

    export rvmsudo_secure_path=1

to avoid the warning, put it in shell initialization file to make it persistent.

In case there is no `secure_path` in `/etc/sudoers`. Run:

    export rvmsudo_secure_path=0

to avoid the warning, put it in shell initialization file to make it persistent.

I tried to execute the below command from rails console of one of the instance to test and it fails to recognize ruby as command

1.9.3-p545 :002 > system("ssh -i /home/ubuntu/.ssh/own_key.pem ubuntu@**.***.***.** ruby execute-52d.rb")
bash: ruby: command not found

I tried with possible solutions over web, but could not resolve the issue. I have the same configuration running for one of my old aws acount, this is a newly created account. Not sure if this could be issue in any way as currently ec2 instances fall under vpc by default and have some changes after dec 2013

Answer 1

Nothing to do with your VPC. So when you run your ruby script with sudo your environment that your user is using doesn't get set for Ruby.

Sounds like you may be using rvm and you probably set it up with a 'single user' config.

Try running as your user :

which ruby

and see where your ruby executable is located at. That's what you have to make sure that when your run your script as sudo it's available in the PATH.

Worst case you would have to reinstall rvm with multiuser config which should work when you run with sudo :

user$ \curl -sSL https://get.rvm.io | sudo bash -s stable