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Why would you want to schedule commands? What methods are available for scheduling commands?

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Although most processes are begun by use...

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Match each term with the correct statement below. -Directory storing the shell environment and scheduled commands.


A) cron daemon
B) program
C) /var/spool/cron
D) trapping
E) PPID
F) PID
G) /etc/crontab
H) /var/spool/at
I) at daemon

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


A) -f
B) -l
C) -a
D) -e

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

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The killall command uses the PID to kill a process.

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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.


A) SIGINT
B) SIGQUIT
C) SIGKILL
D) SIGTERM

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Describe the system cron table. How it is organized, and what information may be contained within it?

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Linux systems are typically scheduled to...

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Match each term with the correct statement below. -The location of system cron tables.


A) cron daemon
B) program
C) /var/spool/cron
D) trapping
E) PPID
F) PID
G) /etc/crontab
H) /var/spool/at
I) at daemon

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G

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


A) *
B) +
C) -
D) /

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Match each term with the correct statement below. -Ignoring a kill signal.


A) cron daemon
B) program
C) /var/spool/cron
D) trapping
E) PPID
F) PID
G) /etc/crontab
H) /var/spool/at
I) at daemon

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D

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


A) -l
B) -u
C) -a
D) -d

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Match each term with the correct statement below. -Daemon used to schedule a command to execute repeatedly in the future.


A) cron daemon
B) program
C) /var/spool/cron
D) trapping
E) PPID
F) PID
G) /etc/crontab
H) /var/spool/at
I) at daemon

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Processes that have encountered an error during execution and continuously uses up system resources are referred to as ____________________ processes.

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The init daemon has a PID of 0. _________________________

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


A) -20
B) 0
C) 1
D) 19

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Match each term with the correct statement below. -The location of user cron tables.


A) cron daemon
B) program
C) /var/spool/cron
D) trapping
E) PPID
F) PID
G) /etc/crontab
H) /var/spool/at
I) at daemon

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What is forking?

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When executing compiled programs or shel...

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


A) &
B) $
C) #
D) %

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Each process can start an unlimited number of other processes.

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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.

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True

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