A shell script named foo is executed as follows: ./foo a "b c" 'a ' Inside the script is the line: head "$*" How many arguments are passed to the head command inside the script?

1

4

3

2 2)

What would be the output echo Hero of the Alliance | tr -d o

Her f the Alliance

Hero of the Alliance

Her of the Alliance

Herd of the Alliance 3)Which grep command will search for a string in the current directory AND all subdirectories?

grep string *

grep "string"

grep -sub "string" *

5)What command would you use to list all files with a third character of r, g or i?

ls [..i*]

ls *[rgi]*

ls ??[rgi]*

ls ?3[rgi]* 6)The runlevel system command is used for which of the following?

setting the runlevel attribute of the system in the inittab file

getting the present and previous runlevel of the system

can be used to restart or reboot the system

all of the above