Largest files:
du -a | sort -n -r | head -n 10
remove files older than 5 days:
find /path/to/files* -mtime +5 -exec rm {} \;
dpkg-query -l '*' > pkglist.txt
AR Related
http://foscam.us/forum/how-to-fetch-snapshots-and-mjpeg-stream-on-hd-cameras-t4328.html
Apache2 - apache2.conf AND /etc/apache2/conf-enabled/apache2-doc.conf