Task $30$

Square brackets, asterisk and question mark can be combined to be used as needed. Type the following examples:

INFO $1111$: Linux I

INFO$-1111$: LINUX I $9$

$1.$ ls $-$d $/$etc$/[$a$,$b$,$c$,$d$]???$

$2.$ ls $-$d $/$etc$/[$a$-$d$]???$

$3.$ ls $-$d $/$etc$/?[$abcd$]??$

$4.$ ls $-$d $/$etc$/[$abcd$]*[$efgh$]$

Explain what the $4$th command in the list above is doing. Why did you get the results that you did? Could the $4$th

command display the file $/$etc$/$echo $($if this file actually existed$)?$ Expain? Could the $3$rd command above list the file

$/$etc$/$echo$?$ Explain.

Submit your answer for this task on the answer sheet as Answer $21$