[Koha] Stuck at final steps of installation

[Paul Yachnes]

I'm installing koha 3 on Ubuntu.

1. When I enter:

sudo a2ensite koha && /etc/init.d/apache2 reload

I get:

This site is already enabled!
open: Permission denied
 * Reloading web server config apache2
apache2: Could not reliably determine the server's fully qualified 
domain name, using 127.0.1.1 for ServerName
httpd not running, trying to start
(13)Permission denied: make_sock: could not bind to address 0.0.0.0:80
no listening sockets available, shutting down
Unable to open logs
open: Permission denied

If I stop apache server first, I get:

This site is already enabled!
open: Permission denied
 * Reloading web server config apache2


2. When I enter:

sudo zebrasrv -f /etc/koha/koha-conf.xml

I get:

08:11:18-14/07 [fatal] lock file 
/var/lock/koha/zebradb/biblios/zebrasrv.pid [No such file or directory]

Any suggestions?

Paul