Basic Wildcards:

Write a command using the $*$ wildcard to list all files in the current directory that have a $.$pdf extension.

Question Mark Wildcard:

Use the $?$ wildcard to find all files in the current directory that have a three$-$letter extension. Provide the

command.

Square Brackets and Ranges:

Write a command using square brackets to list all files in the current directory that have a numeric digit

$(0-9)$ in their name.

Brace Expansion:

Use brace expansion to generate a sequence of filenames for files numbered $1$ through $5.$ Provide the

command.

Combining Wildcards:

Create a command that uses both the $*$ and $?$ wildcards to list all files in the current directory with

names starting with "file" and having a three$-$letter extension.

Advanced Square Brackets:

Write a command using square brackets and a range to list all files in the current directory that have a

single$-$digit number in their name $($e$.$g$.,$ file$1.$txt$).$

Excluding Files with Extended Globbing:

Use the $!()$ extended globbing pattern to list all files in the current directory that do not have a $.$txt

extension.

Copying Files with Wildcards:

Create a command that copies all files in the current directory with names starting with "image" and

having a $.$jpg extension to a destination directory.

Removing Files with Wildcards:

Write a command that removes all files in the current directory except those with names

"important$1.$txt$"$ and "important$2.$txt$."$

Wildcard Error Handling:

What happens if you use a wildcard pattern that doesn't match any files in the current directory? Provide

an example and explain the result.

Sorting

Instructions:

Create a Text File:

Open a text editor and create a file named unsorted.txt$.$

Populate it with the following lines:

dog

apple

$123$

banana

$42$

cat

dog

View the Contents of unsorted.txt:

Open a terminal and use the cat command to view the contents of the unsorted.txt file.

Identify the current order of the lines in the file.

Sort the Lines Alphanumerically:

Use the sort command to sort the lines in unsorted.txt in alphanumerical order.

Save the sorted result to a new file named sorted$\_$alphanumeric.txt$.$

Sort the Lines in Reverse Order:

Use the sort command to sort the lines in unsorted.txt in reverse order.

Save the sorted result to a new file named sorted$\_$reverse.txt$.$

Sort the Lines Numerically:

Use the sort command to sort the lines in unsorted.txt in numerical order.

Save the sorted result to a new file named sorted$\_$numeric.txt$.$

Sort Based on Specific Fields:

Use the sort command to sort the lines in unsorted.txt based on the second field $($space$-$separated$).$

Save the sorted result to a new file named sorted$\_$field.txt$.$

Remove Duplicate Lines:

Use the sort command to remove duplicate lines from unsorted.txt$.$

Save the result to a new file named unique$\_$lines.txt$.$

Submission:

Provide the commands used to accomplish each task.

Include screenshots or text output showing the content of each sorted file.

Tips:

Use the man sort command to explore additional options and details about the sort comman