[sf-lug] sudo

[Alex Kleider]

I am working with a headless Raspberry Pi and would like to be able
to add a line to a file owned by root but would like to do this from
within a bash script that itself is not run with root privileges.[1]

Here is what I have come up with so far:


#!/bin/bash
# File: t.sh

export ap_ip=10.10.10.10

sudo sh -c 'echo "$ap_ip  library library.lan rachel rachel.lan" >> 
/etc/hosts'



This seems to work except for the fact that the variable ap_ip
does not get inserted, only the other part of the line.
I think it's because the quoting has not allowed the variable to
be passed.

Can anyone advise how this should be done?
Thanks in advance.



[1] It so happens that the Raspberry Pi does not ask for a password
when an sudo command is issued (not sure how that is- not seen it
on any other Linux system.)



-- 
Alex Kleider
(sent from my current gizmo)