Novell LINUX ENTERPRISE DESKTOP 11 - SECURITY GUIDE 17-03-2009 Manual page 92

Current Directory in root's Path / Current Directory in Path of Regular Users
Whenever a program is called without specifying the full path to the executable,
the system looks in the user's search path (defined by the variable $PATH) for the
executable. By default the current directory is not added to the search path. This
setting ensures that, for example, /bin/ls and not the trojan horse /current
directory/ls is executed when entering ls. In order to start a program in the
current directory the command must be prefixed with ./. When activating these
options, the current directory (.) is appended to the search path. It is recommended
you not change the default.
Enable Magic SysRq Keys
The magic SysRq key is a keycombo that enables you to have some control over
the system even when it has crashed. The complete documentation can be found
at /usr/src/linux/Documentation/sysrq.txt (requires installation
of the package kernel-source).
80 Security Guide