Check processes

– top –n 1 –b

– ps- aux

Check installed software

– rpm –q –a

– RPM = Red Hat Package Manager = installer packages for software on RH systems

– Look out for unnecessary packages

– Also ensure latest versions of packages are installed – especially those that are used by lower-privileged users: httpd, openssh, kernel, sendmail, etc.

– rpm –q –a | grep kernel