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

STEP 1 create a function in a bash file (write_pacman.sh)

#!/bin/bash

function write_pacman {
 tee -a /etc/pacman.conf > /dev/null << 'EOF'
  [archlinuxfr]
  Server = http://repo.archlinux.fr/\$arch
EOF
}

'EOF' will not interpret $arch variable.

STE2 source bash file

$ source write_pacman.sh

STEP 3 execute function

$ write_pacman