Understanding Basic Linux Security
Christopher Negus · 2015
Understanding security is a crucial part of Linux system administration. Securing your Linux systems must be done in several layers. It begins by physically securing the computers Linux runs on and proceeds through using good basic techniques for properly defining and securing user accounts. A Clean Desk Policy (CDP) mandates either that only the papers being currently worked on are on a desk or that all papers must be locked away at the end of the day. User accounts are part of the authentication process allowing users into the Linux system. Proper user account management enhances a system's security. To avoid such security issues, watching over user accounts is an important activity. Important files, such as /etc/passwd, do need to be monitored for unauthorized account creation. A security review is an audit of current policies and procedures to ensure that they follow accepted best security practices.