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UNIX Lesson 5

1. To run a program in the background, add this character to the end of the command line before you press the RETURN key
;
#
&
*

2. The kill command
requires the PID be entered as a parameter
kills the most recently launched process by default
only kills processes running in the foreground

3. The correct order of the seven fields in a system crontab entry are:
minute, hour, day-of-month, month, day-of-week, user, command
user, command, minute, hour, day-of-month, month, day-of-week
minute, hour, day-of-month, month, day-of-week, command, user

4. Which numeral represends Tuesday in a crontab entry?
2
1
4
3

5. Job control
allows only one program to be running in the background at a time
only applies to non-windows systems
lets you run more than one program inside the same terminal

6. The system wide crontab is most often found in
/etc/crontab
/bin/crontab
/root/contab
/crontab

7. Which command allows you to check on the status of a process?
ps
kill
which
tty
stat

8. The per-user crontab has a slightly different field list than the system crontab.
True False

9. Which parameter to the crontab command will let you review your current crontab entries?
-s
-l
-r
-v

10. The CRON daemon
Wakes up every nanosecond to check the crontabs
runs all the time when the system is up
is only accessible to the superuser

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