How do I run a local bash script on remote machines via ssh?

You can pass a script and have it execute ephemerally by piping it in and executing a shell.

e.g.

echo "ls -l; echo 'Hello World'" | ssh me@myserver /bin/bash

Naturally, the "ls -l; echo 'Hello World'" part could be replaced with a bash script stored in a file on the local machine.

e.g.

cat script.sh | ssh me@myserver /bin/bash

Cheers!

There are several ways to do it.

1:

ssh user@remote_server 'bash -s' < localfile

2:

cat localfile  | ssh user@remote_server

3:

ssh user@remote_server "$(< localfile)"

number 3 is my prefered way, it allows interactive commands e.g. sudo -S service nginx restart

(#1 and #2 will consume the rest of the script as input for the password question when you use sudo -S.)