This place is known for both their price and portion size. I generally get two meals out of a single $30 sandwich.
Regardless of how popular the place is with tourists, it is still a classic.
And, bonus: if the line is too long you can just go to Russ and Daughters a block away and grab a pastrami lox bagel (see attached).
Try Termux, it's great.
While it doesn't get you sudo, it does get you a package manager and a decent amount of programs.
I use it and rclone to sync my cell phone's photos to a S3 bucket.