This is my go-to method for doing that. Years ago, in the 90s, I used that trick (with ftp) to overwrite a custom login script used to "prevent" users from logg

This is my go-to method for doing that. Years ago, in the 90s, I used that trick (with ftp) to overwrite a custom login script used to "prevent" users from logging in. You'd login and it would spit out like "You are not allowed to login!" and then immediately log you out. Well, ftp (this is before sftp or scp) let me copy over that. This was actually one of the computers used by the newspaper in the next town over. I'm still shocked actually that the worst I ever got from the sysadmin there was a stern phone call.