Ssh remote execution of multiple files

bashssh

I've got two local files, one config.sh that contains variable definitions, another script.sh that contains a bash script.

Locally, I can do:

source config.sh; bash script.sh

I'm looking for the same thing via ssh, so far I got this working:

ssh user@host 'bash -s' < script.sh

But I'm not sure if I should use cat or some input pipes <(...) to get both config.sh & script.sh to be executed.

What would be the best, clean way to execute multiple commands that require some content to be piped in with ssh?

Best Answer

Assuming both scripts are on the local host, not the remote host:

cat config.sh script.sh | ssh -T remote_host bash

You may want to use the '-t' flag if instead if you wish to force pseudo-TTY allocation on the remote end. The local SSH process wont't have one since you stdin is from a pipe. You only need to add the string "bash" to the end of the command line if that is not the default shell on the remote end. Also, note that your original code wouldn't work unless your "variable definitions" export the environment variables in question.

Related Solutions

Ssh – How to automate SSH login with password

Don't use a password. Generate a passphrase-less SSH key and push it to your VM.

If you already have an SSH key, you can skip this step… Just hit Enter for the key and both passphrases:

$ ssh-keygen -t rsa -b 2048
Generating public/private rsa key pair.
Enter file in which to save the key (/home/username/.ssh/id_rsa):
Enter passphrase (empty for no passphrase):
Enter same passphrase again:
Your identification has been saved in /home/username/.ssh/id_rsa.
Your public key has been saved in /home/username/.ssh/id_rsa.pub.

Copy your keys to the target server:

$ ssh-copy-id id@server
id@server's password:

Now try logging into the machine, with ssh 'id@server', and check-in:

.ssh/authorized_keys

Note: If you don't have .ssh dir and authorized_keys file, you need to create it first

to make sure we haven’t added extra keys that you weren’t expecting.

Finally, check to log in…

$ ssh id@server

id@server:~$

You may also want to look into using ssh-agent if you want to try keeping your keys protected with a passphrase.

SSH – Bad Owner or Permissions on ~/.ssh/config

I needed to have rw for user only permissions on config. This fixed it.

chmod 600 ~/.ssh/config

As others have noted below, it could be the file owner. (upvote them!)

chown $USER ~/.ssh/config

If your whole folder has invalid permissions here's a table of possible permissions:

Path	Permission
.ssh directory (code)	0700 (drwx------)
private keys (ex: `id_rsa`) (code)	0600 (-rw-------)
`config`	0600 (-rw-------)
public keys (*.pub ex: `id_rsa.pub`)	0644 (-rw-r--r--)
`authorized_keys` (code)	0644 (-rw-r--r--)
`known_hosts`	0644 (-rw-r--r--)

Sources:

openssh check-perm.c
openssh readconf.c
openssh ssh_user_config fix_authorized_keys_perms

Best Answer

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Ssh – How to automate SSH login with password

SSH – Bad Owner or Permissions on ~/.ssh/config

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