Some words about the errors you get which hopefully save you to similar situations in future.
In Linux ports from 0 to 1024 are reserved for system use. This means that in order to use one you must have the authority to change - access basic system settings. The root user has such privileges and can actually use a port from the range 0 - 1024.
In your problem as you can see, the system through Apache2 repsonse indicates the root of the problem ([...]could not bind to address blah blah 80):
(13)Permission denied: make_sock: could not bind to address [::]:80
(13)Permission denied: make_sock: could not bind to address 0.0.0.0:80
When the Apache2 http daemon starts, it tries to bind the 80 port as it is the default port for use in HTTP see, a port within the system assigned ports; a port that can be accessed by root. You executed the start command as a typical user with without root privileges and led to failure to do so.
In simple words:
Hi Apache2 i am Kongthap and i am telling you to start (
Ok i am starting (Starting web server apache2)
System please give me port 80 to use and listen for connections
OK one moment to check
ahh sorry Apache2 but i cannot let you run at 80 port, it is for personal use
and you do not have the correct privileges to bind it.(
Operation not permitted)
Ohh, Kongthap i failed to start, the system did not let me do it ((13)Permission denied:[...])
There are mainly two solutions to this problem:
1) Run the Apache2 http daemon with root privileges using sudo
sudo service apache2 start prefered method
sudo /etc/init.d/apache2 start
2) Change the default port from
80 to something greater than
9000, etc. A typical port to run when in such situation is
sudo vi /etc/apache2/ports.conf
look for or if not there add:
or any other port of your choice such as port
> 1024 and the selected port is not used by another process.