You wish to send a kill signal to the parent process of your program called cathena. Which of the following commands should you execute first?

Question $41$ options:

pstree

fuser

ps$-$e

killall

Question $42(1$ point$)$

You notice a $\%$user that is greater than $\%$system. What should you do$?$

Question $42$ options:

upgrade the CPU

upgrade the RAM

upgrade the hard disk

nothing

Question $43(1$ point$)$

Which of the following commands would list all lines that contain the word "super" in all files in the $/$ etc directory?

Question $43$ options:

grep $/$etc$/*$ super

grep super etc

grep super $../$etc

grep super $/$etc$/*$

Question $44(1$ point$)$

Which of the following utilities displays swap$/$paging statistics? $($Choose all that apply$)$

Question $44$ options:

top

free

sar$-$W

vmstat

Question $45(1$ point$)$

Which of the following commands can be used to test SMTP connectivity to your local sendmail or postfix server?

Question $45$ options:

echo EHLO $>/$dev$/$port$/25$

sendmail coonfigtest or postfix configtest

telnet localhost $25$

testparm

Question $46(1$ point$)$

Which of the following commands can perform low$-$level adjustment of your video card?

Question $46$ options:

XF$86$Setup

Mouseadmin

xvidtune

Xconfigurator

Question $47(1$ point$)$

Which is true regarding hard links?

Question $47$ options:

When a hard link is edited, other linked files are updated

They use different inode numbers

Hard links are commonly made to directories

Hard links are pointers to target files

Question $48(1$ point$)$

Which of the following can be used to configure a NICs IP configuration?

Question $48$ options:

ifconfig

ifup

insmod

ifdown

Question $49(1$ point$)$

What directory does the sar command look for files in when you specify the $-$f argument?

Question $49$ options:

~$/$sa

$/$var$/$log$/$sar

$/$var$/$log$/$sa

~$/$sar

Question $50(1$ point$)$

What command may be used to prevent packets from the $3\mathrm{.}0\mathrm{.}0\mathrm{.}0/8$ network from being routed through your Linux router?

Question $50$ options:

iptables$-$A INPUT$-$s $3\mathrm{.}0\mathrm{.}0\mathrm{.}0/8-$j REJECT

iptables$-$A INPUT$-$s $3\mathrm{.}0\mathrm{.}0\mathrm{.}0/8-$m REJECT

iptables$-$A FORWARD$-$s $3\mathrm{.}0\mathrm{.}0\mathrm{.}0/8-$m REJECT

iptables$-$A FORWARD$-$s $3\mathrm{.}0\mathrm{.}0\mathrm{.}0/8-$j REJECT