Help me backup a configuration file?
 

I've read:

It's always a good idea to backup a configuration file like sources.list before you edit it. To do so, issue the following command: sudo cp /etc/apt/sources.list /etc/apt/sources.list.backup


Where does it backup to and how do I access it? I want to put the backup on removable disk or upload it

The format of the cp (copy) command is:

cp <source> <destination>

So in your example, you are copying the file '/etc/apt/sources.list' to the file '/etc/apt/sources.list.backup'.

Your backup is in '/etc/apt/sources.list.backup', which you can copy elsewhere if you like.

It's backup to the
directory
To make a backup to a removable disk,
mount the disk and use
To upload the file, point your ftp to the
directory, or where ever you stored the file

Kind regards