On Linux systems there are a few temporal directories used for storage, like /tmp, /var/tmp and /dev/shm. This directories are used to store temporary files from different services such as Apache, MySQL, etc.

However, sometimes this directories are also used by crackers and script kiddies to store malicious/malware and virus executables. This malicious scripts can be an open door to send spam, exploit the system as root or spread viruses over the network.

This tutorial will show you how to secure /tmp partition, and also the /dev/shm directory. Continue reading →