The following script parses the password file and prints it out by the user's "realname" "home directory" "login name"

#!/bin/sh

OLDIFS=$IFS IFS=:

cat /etc/passwd | while read f1 f2 f3 f4 f5 f6 f7 do

if [ "$f5" ] then

IFS=,

set -- $f5

echo "$f1 $1 $f6" IFS=:

fi done

IFS=$OLDIFS

True False

QUESTION

The following command a lways correctly loops through each of the positional parameters as passed on the command line.

#!/bin/sh

for I in "$*" do

echo $I done

True False

QUESTION 20

The following command sends both standard output and standard error to the same file for the command, cmd1.

cmd1 2>&1 > outfile

True False

QUESTION 21

A sub-shell is created when you do file redirection to a loop and you are running in the bash or korn shell. (The student should test this to verify the answer)

True False

QUESTION 22

Putting a #!/bin/csh as the first line in a shell script will execute the script in the borne shell.

True False

QUESTION 23

After the statement

: ${VISUAL:=vi}

The value of the shell variable VISUAL will ALWAYS be vi.

True False

QUESTION 24

Given the script - test-me

#!/bin/bash PATH=$PATH:

echo $PATH

# end of the script

True/False - the following 2 commands are exactly the same which means there is no change to the user's environment after they execute.

. ./test-me

./test-me

True False

QUESTION 25

Given the following script:

#!/bin/sh

if grep "mrichards" /etc/password then

echo "I FOUND A MATCH"

fi

And the password file of the following:

root:x:0:1:CE.UML.EDU Super-User:/:/bin/sh daemon:x:1:1::/:

bin:x:2:2::/usr/bin: sys:x:3:3::/: adm:x:4:4:Admin:/var/adm:

postfix:x:72:6:Postfix email user:/etc/postfix: lp:x:71:8:Line Printer Admin:/usr/spool/lp: uucp:x:5:5:uucp Admin:/usr/lib/uucp:/usr/bin/true

nuucp:x:9:9:uucp Admin:/var/spool/uucppublic:/usr/lib/uucp/uucico smmsp:x:25:25:SendMail Message Submission Program:/: listen:x:37:4:Network Admin:/usr/net/nls: nobody:x:60001:60001:Nobody:/:

noaccess:x:60002:60002:No Access User:/: beoper:x:30:30:Backup Exec Operator:/users/beoper:/usr/bin/ksh

webservd:x:80:80:Web Server Daemon:/space/apache2/home:/bin/pfsh www:x:100:80:Web Server Daemon:/space/Apache2/home:/bin/pfsh clamav:x:221:221:CLAM VIRIS CHECKER:/opt/clamav:/usr/bin/ksh sshd:x:299:1:Secure Shell:/usr/local/sshd:/usr/bin/true mysql:x:300:300:MySQL Server:/usr/local/mysql:/usr/bin/true

judyf:x:202:14:Judith Feeney,Southwick 305,(978) 934-2926,:/users/judyf:/usr/bin/ksh mrichard:x:1216:200:Michael Richards:/users/faculty/mrichard:/usr/bin/ksh noquota:x:10004:205:No Quota User Do Not delete:/users/students/noquota:/usr/bin/ksh

Then the script is run, the o nly output of the script would be

I FOUND A MATCH

True False