Simplify OpenConnect with Shell + expect

I often need to VPN into the company from home. The repeated steps are tedious, so I wrote a small shell/expect script to streamline it.

之前的操作

As shown, every time I had to enter the OpenConnect command, a hard‑to‑remember IP, and go through 5 interactive prompts. Time to automate it with a shell script.

Shell automation

Except for the final OTP/password (which I still enter manually), all other inputs can be scripted. I use expect to handle the interactive prompts.

Install expect

Run brew install expect.

Script

Save as vpn.sh:

#!/usr/bin/expect
# vpn to xxx
spawn sudo openconnect 1.1.1.1
expect "Password" {send "xxxxxxxx\r"}
expect "Enter 'yes' to accept" {send "yes\r"}
expect "Username:" {send "xxx\r"}
expect "Password" {send "xxx\r"}
interact

Done. To connect:

1. ./vpn.sh
2. Enter the one‑time code manually

Much faster.

Reference

• 关于shell和expect和ssh