Linux Debian Folder
this is the list of important folders
global
/etc/profile /etc/rc.local /etc/locale.gen /etc/logrotate.d /etc/crontab /etc/fstab /usr/lib/cgi-bin /etc/init.d /var/tmp /var/log/boot
account
/etc/passwd /etc/shadow
Apache2
/etc/php5/apache2/php.ini /etc/apache2/apache2.conf /etc/apache2/sites-available /etc/apache2/sites-enabled
Network
/etc/network/interfaces /etc/hostname /etc/hosts /etc/ports.conf /etc/ssl/certs /etc/ssh/sshd_config