Internal Server Error - .htaccess

Question

I have a copy of a project from internet but I can't run it. It shows error Internal Server Error so I can't run this project.
Here is my .htacces file:
<Files '.ht*'>
order allow,deny
deny from all
</Files>
#suPHP_ConfigPath http://localhost:81/job/
<FilesMatch ".(gif|jpg|jpeg|png|ico|js|css)$">
Header set Cache-Control "max-age=2592000"
</FilesMatch>
Options +SymLinksIfOwnerMatch
Options -Multiviews
RewriteEngine On
RewriteBase /
php_value output_buffering On
RewriteRule job-([0-9]+)-(.*)/?$ ./?p=job&id=$1
RewriteRule job-([0-9]+)/?$ ./?p=job&id=$1
## EXPIRES CACHING ##
<IfModule mod_expires.c>
ExpiresActive On
ExpiresByType image/jpg "access 1 year"
ExpiresByType image/jpeg "access 1 year"
ExpiresByType image/gif "access 1 year"
ExpiresByType image/png "access 1 year"
ExpiresByType text/css "access 1 month"
ExpiresByType text/html "access 1 month"
ExpiresByType application/pdf "access 1 month"
ExpiresByType text/x-javascript "access 1 month"
ExpiresByType application/x-shockwave-flash "access 1 month"
ExpiresByType image/x-icon "access 1 year"
ExpiresDefault "access 1 month"
</IfModule>
## EXPIRES CACHING ##
# compress text, HTML, JavaScript, CSS, and XML
AddOutputFilterByType DEFLATE text/plain
AddOutputFilterByType DEFLATE text/html
AddOutputFilterByType DEFLATE text/xml
AddOutputFilterByType DEFLATE text/css
AddOutputFilterByType DEFLATE application/xml
AddOutputFilterByType DEFLATE application/xhtml+xml
AddOutputFilterByType DEFLATE application/rss+xml
AddOutputFilterByType DEFLATE application/javascript
AddOutputFilterByType DEFLATE application/x-javascript
# remove browser bugs
BrowserMatch ^Mozilla/4 gzip-only-text/html
BrowserMatch ^Mozilla/4\.0[678] no-gzip
BrowserMatch \bMSIE !no-gzip !gzip-only-text/html
Header append Vary User-Agent

Answer 1

You're probably missing a module on your Apache installation (for example mod_headers).
This .htaccess should include IfModule directives to prevent this kind of error:
<Files '.ht*'>
order allow,deny
deny from all
</Files>
#suPHP_ConfigPath http://localhost:81/job/
<IfModule mod_headers.c>
<FilesMatch ".(gif|jpg|jpeg|png|ico|js|css)$">
Header set Cache-Control "max-age=2592000"
</FilesMatch>
</IfModule>
<IfModule mod_rewrite.c>
Options +SymLinksIfOwnerMatch
Options -Multiviews
RewriteEngine On
RewriteBase /
php_value output_buffering On
RewriteRule job-([0-9]+)-(.*)/?$ ./?p=job&id=$1
RewriteRule job-([0-9]+)/?$ ./?p=job&id=$1
</IfModule>
## EXPIRES CACHING ##
<IfModule mod_expires.c>
ExpiresActive On
ExpiresByType image/jpg "access 1 year"
ExpiresByType image/jpeg "access 1 year"
ExpiresByType image/gif "access 1 year"
ExpiresByType image/png "access 1 year"
ExpiresByType text/css "access 1 month"
ExpiresByType text/html "access 1 month"
ExpiresByType application/pdf "access 1 month"
ExpiresByType text/x-javascript "access 1 month"
ExpiresByType application/x-shockwave-flash "access 1 month"
ExpiresByType image/x-icon "access 1 year"
ExpiresDefault "access 1 month"
</IfModule>
## EXPIRES CACHING ##
# compress text, HTML, JavaScript, CSS, and XML
<IfModule mod_filter.c>
AddOutputFilterByType DEFLATE text/plain
AddOutputFilterByType DEFLATE text/html
AddOutputFilterByType DEFLATE text/xml
AddOutputFilterByType DEFLATE text/css
AddOutputFilterByType DEFLATE application/xml
AddOutputFilterByType DEFLATE application/xhtml+xml
AddOutputFilterByType DEFLATE application/rss+xml
AddOutputFilterByType DEFLATE application/javascript
AddOutputFilterByType DEFLATE application/x-javascript
</IfModule>
# remove browser bugs
<IfModule mod_setenvif.c>
<IfModule mod_headers.c>
BrowserMatch ^Mozilla/4 gzip-only-text/html
BrowserMatch ^Mozilla/4\.0[678] no-gzip
BrowserMatch \bMSIE !no-gzip !gzip-only-text/html
Header append Vary User-Agent
</IfModule>
</IfModule>
You should check that your Apache installation includes those modules:
mod_headers
mod_rewrite
mod_expires
mod_filter
mod_setenvif