Chapter 9

Processes are started with what nice value by default?

0

Zombie processes are also known as defunct processes.?

True

After a background process has been started, what command below can be used to move it to the foreground?

fg (foreground)

What kill signal stops a process, then restarts it with the same PID?

kill -1 or kill -SIGHUP

Which 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?

kill -3 or kill -SIGQUIT

When killing a background job with the kill command, the background job ID must be prefixed by what character below?

%

What character, when appended to a command, causes the command to be run in the background?

& (ampersand)

When there are multiple background processes executing in the shell, the jobs command indicates the most recent one with which symbol?

+

How many different kill signals can be sent by the kill command to a given process?

64

The killall command uses the PID to kill a process.

False - Kill command uses the process name to kill instead of the PID

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.

False - if neither file exists, all users are allowed to schedule tasks, which is the case on a newly installed ubuntu system.

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

S

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

True

Each process can start an unlimited number of other processes.

True

What option can be used with the ps command to display an entire list of processes across all terminals and including daemons?

ps -ef