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To enable Compression & Leverage browser caching you need to edit the following files.

To enable compression on Nginx edit the Nginx config and add below lines

vi /etc/nginx/nginx.conf

gzip on;
gzip_disable “MSIE [1-6]\.(?!.*SV1)”;
gzip_types text/plain [s]text/html[/s] text/css application/json application/x-javascript text/xml application/xml application/xml+rss text/javascript application/javascript text/x-js;

To enable compression on Apache edit the Apache config

vi /etc/httpd/conf/httpd.conf

Search the line that says,

#LoadModule deflate_module modules/mod_deflate.so

and uncomment it by removing the ‘#’ mark

Then

vi /etc/httpd/conf.d/deflate.conf

and place the following code in it

SetOutputFilter DEFLATE

DeflateCompressionLevel 9
AddOutputFilterByType DEFLATE text/html
AddOutputFilterByType DEFLATE text/plain
AddOutputFilterByType DEFLATE text/xml
AddOutputFilterByType DEFLATE text/css
AddOutputFilterByType DEFLATE text/javascript
AddOutputFilterByType DEFLATE application/javascript
AddOutputFilterByType DEFLATE application/xhtml+xml
AddOutputFilterByType DEFLATE application/xml
AddOutputFilterByType DEFLATE application/rss+xml
AddOutputFilterByType DEFLATE application/atom_xml
AddOutputFilterByType DEFLATE application/x-javascript
AddOutputFilterByType DEFLATE application/x-httpd-php
AddOutputFilterByType DEFLATE application/x-httpd-fastphp
AddOutputFilterByType DEFLATE application/x-httpd-eruby
AddOutputFilterByType DEFLATE image/svg+xml

To enable Enable Leverage browser caching

create a /etc/httpd/conf.d/expires.conf file, paste the below code and save it.

ExpiresActive On
ExpiresByType image/jpg "access plus 1 year"
ExpiresByType image/jpeg "access plus 1 year"
ExpiresByType image/gif "access plus 1 year"
ExpiresByType image/png "access plus 1 year"
ExpiresByType text/css "access plus 1 month"
ExpiresByType application/pdf "access plus 1 month"
ExpiresByType text/x-javascript "access plus 1 month"
ExpiresByType text/javascript "access plus 1 month"
ExpiresByType application/x-shockwave-flash "access plus 1 month"
ExpiresByType image/x-icon "access plus 1 year"
ExpiresDefault "access plus 2 days"