How to write a script to launch Thinkorswim

Question

I am trying to make a script that automatically launches Thinkorswim from a simple command in the terminal. I wrote an incredibly simple script:

#!/bin/sh

sh /opt/thinkorswim/thinkorswim

This is in the /usr/bin directory so I can just type thinkorswim in the terminal. The application requires sudo to run, and I want to make it so I don't have to type in sudo, and then my password. This is partly just for speed and convenience, and partly because I want to be able to launch it through dmenu on i3.

1. I have tried putting echo password | sudo sh... in the script. This does not work.
2. I have tried adding username ALL=(ALL) NOPASSWD: /opt/thinkorswim/thinkorswim to sudoers, after adding sudo before sh in the script. This does not work.
3. I have tried adding username ALL=(ALL) NOPASSWD: /usr/bin/thinkorswim to sudoers. I quickly realized that I would still need to type sudo before thinkorswim when lauching it through the terminal, and this still does not work through dmenu.

I restarted my computer after I modified sudoers each time. I am running Ubuntu 20.04 LTS, with i3wm version 4.17.

TL;DR: I am trying to run a script with sudo permissions without actually having to type sudo and my password. How do I do this?

Any help is appreciated, thanks.

Answer 1

This was a pretty easy fix. Thanks to user muru for helping. I made the script say this:

#!/bin/sh

sudo /opt/thinkorswim/thinkorswim

Then added this to /etc/sudoers:

username ALL=(ALL) NOPASSWD: /opt/thinkorswim/thinkorswim

sudo was running on sh, not on the file itself. Everything works perfectly now, this will save me alot time every day. Thanks again to muru.