apache invalid command 'ScriptAlias' - apache

Question

I am trying to get apache2 running but no matter what I do, localhost comes up as 404 not found.
There has been so many errors that Debian doesn't even think Apache2 is installed, but it is functional, and running. But I cannot remove it with --purge or otherwise.
When I start apache I get
root#debian:/tmp# /etc/init.d/apache2 restart
Syntax error on line 16 of /etc/apache2/sites-enabled/000-default:
Invalid command 'ScriptAlias', perhaps misspelled or defined by a module not included in the server configuration
Action 'configtest' failed.
The Apache error log may have more information.
failed!
Here is site file
<VirtualHost *:80>
ServerAdmin webmaster#localhost
DocumentRoot /var/www
<Directory />
Options FollowSymLinks
AllowOverride None
</Directory>
<Directory /var/www/>
Options Indexes FollowSymLinks MultiViews
AllowOverride None
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
</VirtualHost>
I've tried various configurations. My goal is to utilize multiple IPs for different virtual hosts on port 80, but I haven't even gotten it to work after my last disaster and re installation.

Answer 1

ScriptAlias is provided by mod_alias. On debian based distributions, use a2enmod to make sure mod_alias is loaded:
sudo a2enmod alias