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Apache - Harden Apache - Restrict Apache Information Leakage

Edit the Apache2 configuration security file:

sudo vi /etc/apache2/conf-available/security.conf

Add or edit the following lines and save:

ServerTokens Prod
ServerSignature Off
TraceEnable Off
Header unset ETag
Header always unset X-Powered-By
FileETag None

Restart Apache server. Open a Terminal and enter the following:

sudo service apache2 restart