Why sudo cat gives a Permission denied but sudo vim works fine?

Question

I am trying to automate the addition of a repository source in my arch\'s pacman.conf file but using the echo command in my shell script. However, it fails like th

Answer 1

The problem is that the redirection is being processed by your original shell, not by sudo. Shells are not capable of reading minds and do not know that that particular >> is meant for the sudo and not for it.

You need to:

1. quote the redirection ( so it is passed on to sudo)
2. and use sudo -s (so that sudo uses a shell to process the quoted redirection.)