Linux+ Chapter 09

A system process that is not associated with a terminal is called a(n) ____ process.

Daemon

T/F - After a process has been started, you can change its priority by using the renice command.

True

The ____ option to the ps command displays all processes that do not run on terminals.

X

When killing a background job with the kill command, you must prefix the background job IDs by a(n) ____.

%

When you append a(n) ____ to a command, the command is run in a background process.

&

When there are multiple background processes executing in the shell, the jobs command indicates the most recent one with a(n) ____ symbol.

+

To create or edit a user cron table, you can use the ____ option to the crontab command.

-e

To display an entire list of processes across all terminals and including daemons, you can add the ____ option to any ps command.

-e

Processes are started with a nice value of ____ by default.

0

After a background process has been started, it can be moved to the foreground by using the ____ command.

fg

To display a list of at Job IDs, you can specify the ____ option to the at command.

-l

T/F - A value of 0 for a process priority indicates low priority.

False

T/F - Can the top command be used to change the priority of processes?

False

T/F - The SIGINT kill signal is the default kill signal used by the kill command.

False

T/F - The init daemon has a PID of 0.

False

T/F - The killall command uses the PID to kill a process.

False

T/F - The ps command is the only command that can view process information.

False

In the output of the ps -l command, the ____ column is the most valuable to systems administrators because it indicates what the process is currently doing.

Process state

The ____ kill signal stops a process and then restarts it with the same PID.

SIGHUP

The ____ kill signal terminates a process by taking the process information in memory and saving it to a file called core on the hard disk in the current working directory.

SIGQUIT

The ____ field in a cron table contains the absolute pathname to the command to be executed.

Sixth

T/F - Each process can start an unlimited number of other processes.

True

T/F - If the /etc/at.allow and /etc/at.deny files do not exist, only the root user is allowed to schedule tasks using the at daemon.

True

T/F - Most commands such as ls, find, and grep are binary programs that exist on the filesystem until executed.

True

T/F - While a process is waiting for its parent process to release the PID, the process is said to be in a(n) zombie state.

True

You can execute ____ main types of Linux commands.

Three

There are ____ different kill signals that the kill command can send to a certain process.

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