LPI 101-500 Exam With Confidence Using Practice Dumps

According to the Filesystem Hierarchy Standard (FHS), the directory /usr/share/man contains manual pages for user commands, system calls, library functions, and other documentation1. The other directories are either non-standard, deprecated, or used for different purposes. For example, /opt/man is used for manual pages for add-on application software packages1, /usr/doc/ is an old location for documentation files that is no longer used2, /var/pkg/man and /var/man are not defined by the FHS. References:

[LPI Linux Essentials - 1.6 Basic File Editing]

[LPI Linux Essentials - 1.7 Personalize and/or Localize Your Linux System]

[LPI Linux Essentials - 1.8 Basic Security and File Permissions]

The nice command is used to start a process with a modified scheduling priority. The scheduling priority is a value that determines how much CPU time a process will receive from the kernel. The lower the priority, the more CPU time a process will get. The priority is also known as the nice value, because a process with a high nice value is being nice to other processes by giving up CPU time. The nice value ranges from -20 to 19, with -20 being the highest priority and 19 being the lowest. By default, processes are started with a nice value of 0, which means normal priority.

The nice command takes an optional argument -n followed by a number, which specifies the increment or decrement of the nice value from the default value of 0. For example, the command:

nice -n 5 /usr/bin/prog

will start the /usr/bin/prog process with a nice value of 5, which means a lower priority than the default. Similarly, the command:

nice -n -5 /usr/bin/prog

will start the /usr/bin/prog process with a nice value of -5, which means a higher priority than the default. If the -n argument is omitted, the nice command will assume a default increment of 10. For example, the command:

nice /usr/bin/prog

will start the /usr/bin/prog process with a nice value of 10, which means a very low priority. Note that only the root user can start a process with a negative nice value, as this requires special privileges.

Therefore, the command:

nice -5 /usr/bin/prog

is equivalent to:

nice -n -5 /usr/bin/prog

and will start the /usr/bin/prog process with a nice value of -5, which means a higher priority than the default. This means that the correct answer is B. /usr/bin/prog is executed with a nice level of 5.