You can take many steps to protect your system against intrusion, but security isn't a binary matter of being secure or not being secure; it's a matter of degrees. Even systems that are very well protected have vulnerabilities. For this reason, you should be alert to the possibility of intrusions. General awareness of your system's normal operating behavior can be invaluable because deviations from normal behavior can be an indication of trouble. Beyond this, security tools provide systematic methods of looking for intrusion. Taking the time to configure Tripwire is very worthwhile, and chkrootkit can help you identify an intrusion after it's occurred. Recovering from a breach can be a tedious undertaking, but doing the job right can save you a lot of grief caused by a repeat visit from an uninvited guest.

Team LiB

Team LIB

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