Unable to restart apache

[Doug S]

O.K. so your ports.conf file is the default. The point I was trying to make is, I suggest, still valid. The reason you don't see anything with "netstat -tulpn" is because it is apache itself binding to the port and then trying to bind to it again. Why? I don't know, but I would suggest to continue looking at your config files.

[astarmathsandphysics]

That sounds possible. I had the same issue on Friday, then for some reason after a couple of hours, everything started working again.

[Doug S]

For example: I was able to create the same error by messing with /etc/apache2/sites-available/default.

doug@s15:/etc/apache2/sites-available$ sudo service apache2 restart
 * Restarting web server apache2         (98)Address already in use: make_sock: could not bind to address 0.0.0.0:80
no listening sockets available, shutting down
Unable to open logs
Action 'start' failed.
The Apache error log may have more information.

[astarmathsandphysics]

This is /etc/apache2/sites-avai;lablexxxxxxxx.info

can you identity any possible errors

<VirtualHost *:80>
ServerAdmin webmaster@localhost
ServerName courseworkbank.info
ServerAlias www.xxxxxxx.info
DocumentRoot /var/www/courseworkbank
<Directory />
Options FollowSymLinks
AllowOverride None
</Directory>
<Directory /var/www/courseworkbank/>
Options Indexes FollowSymLinks MultiViews
AllowOverride All
Order allow,deny
allow from all
</Directory>

ScriptAlias /cgi-bin/ /usr/lib/cgi-bin/
<Directory "/usr/lib/cgi-bin">
AllowOverride None
Options +ExecCGI -MultiViews +SymLinksIfOwnerMatch
Order allow,deny
Allow from all
</Directory>

ErrorLog ${APACHE_LOG_DIR}/error.log

# Possible values include: debug, info, notice, warn, error, crit,
# alert, emerg.
LogLevel warn

CustomLog ${APACHE_LOG_DIR}/access.log combined

Alias /doc/ "/usr/share/doc/"
<Directory "/usr/share/doc/">
Options Indexes MultiViews FollowSymLinks
AllowOverride None
Order deny,allow
Deny from all
Allow from 127.0.0.0/255.0.0.0 ::1/128
</Directory>

</VirtualHost>

[volkswagner]

Perhaps you can explain your setup a bit more. Is this a virtual machine? How many physical/virtual network adapters? Can you post /etc/network/interfaces?
Do you have a service bound to a specific adapter?

I see you have at least two public ip addresses. *.*.*.92 responds to pings and is hosting website at the moment. *.*.*.93 does not respond to pings.
Are both ip's behind the same firewall/non firewall? I think your problem is not with Apache2.

According to your website, it does seem apache or a different web server is running. Do you have Nginx or something else installed.

What's the output of:

 ps aux | grep apache2

[astarmathsandphysics]

Found the issue.
While trying to configure a website for a different ip address I inserted this at the top of /etc/apache2/sites-enabled/website.file

Listen *:80
Listen 1.2.3.4:80

Fixed now and thanks all