The UNIX/Linux server security is challenging because these servers are at a risk of getting compromised at any point of time by the attackers. In today's enterprise environment, the UNIX and Linux servers are growing popular. With their increased popularity, these servers have become the primary target of the attackers for security breaches. There have been numerous cases of harmful external security threats where the attackers have gained access to these servers; UNIX and Linux, through the Internet. The largest security threat to UNIX/Linux server is internal, not external. Therefore, it is must for the enterprises to improve their UNIX/Linux server security, so that comprising server becomes complicated for the hackers.

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