```Get:40 http://ftp.us.debian.org/debian stretch/non-free Translation-en [80.4 kB]
Get:41 http://ftp.us.debian.org/debian stretch/contrib amd64 Packages [50.9 kB]
Fetched 33.3 MB in 9s (3,338 kB/s)                                             
Reading package lists... Done
Building dependency tree       
Reading state information... Done
164 packages can be upgraded. Run 'apt list --upgradable' to see them.
E: Could not open lock file /var/lib/dpkg/lock - open (13: Permission denied)
E: Unable to lock the administration directory (/var/lib/dpkg/), are you root?
chris@debian:~$ 
```