Question 37876 in Ubuntu Question posted in
The official Ubuntu documentation can be found here.

Run a script on remote server with ssh password or key – Ubuntu

I’m trying to run a script on a remote server with either password credentials or .pem key access and I’m getting errors no matter which solution I’ve found etc.

bash script content:

#!/bin/bash
sudo fdisk -l


ssh -T -i "~/.ssh/keys/key.pem" ubuntu@host "sudo bash <(wget -qO- http://host.com/do.sh)"
Error: bash: /dev/fd/63: No such file or director

ssh [email protected] 'echo "password" | sudo bash <(wget -qO- http://www.host.io/do.sh)'
Error: sudo: a password is required

ssh -t [email protected] "echo password | sudo fdisk -l"
Works but still gives me the password propmt

echo -t pass | ssh user@host "sudo bash <(wget -qO- http://host.com/do.sh)"
echo -tt pass | ssh user@host "sudo bash <(wget -qO- http://host.com/do.sh)"
Error: bash: /dev/fd/63: No such file or directory
// And I also get the password prompt

echo -tT pass | ssh user@host "sudo bash <(wget -qO- http://host.com/do.sh)"
Error: sudo: a terminal is required to read the password; either use the -S option to read from standard input or configure an askpass helper
       sudo: a password is required
// And I also get the password prompt

// This works but I still get the password propmt
ssh user@host 'echo "password" | sudo -S sudo fdisk -l'

These are different variations of the supposed solutions from other places.

What I’m trying to do:

  1. Is to run a script from a URL on the remote server while echoing the password to the cmd so I don’t get propmt to input the password manually.
  2. To be able to do the same thing above with using the .pem key variant also
Tags:

2

Answers


  1. 0

    For an explanation for commands except the first one, You can’t do stdin-redirect a password to ssh if ssh requires interactively. ssh only allows manual typing if you use a password.

    Your first error said that bash can’t read a file descriptor. So ssh via ~/.ssh/keys/key.pem works. To run the shell command on the fly,

    ssh -T -i "~/.ssh/keys/key.pem" ubuntu@host "curl -fsSL http://host.com/do.sh | sudo bash"
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  2. 0

    Does your script really need to run with sudo??

    If not, then try this:

    ssh user@host "curl -s -o do.sh 'http://host.com/do.sh'; source do.sh"
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