LPI Linux Certification/Perform security administration tasks

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Detailed Objective[edit]

(LPIC-1 Version 5.0)


Weight: 3


Description: Candidates should know how to review system configuration to ensure host security in accordance with local security policies.


Key Knowledge Areas:

  • Audit a system to find files with the suid/sgid bit set.
  • Set or change user passwords and password aging information.
  • Being able to use nmap and netstat to discover open ports on a system.
  • Set up limits on user logins, processes and memory usage.
  • Determine which users have logged in to the system or are currently logged in.
  • Basic sudo configuration and usage.


The following is a partial list of the used files, terms and utilities:

  • find
  • passwd
  • fuser
  • lsof
  • nmap
  • chage
  • netstat
  • sudo
  • /etc/sudoers
  • su
  • usermod
  • ulimit
  • who, w, last