Linux Wildcard and Meta Characters Instructor Guide

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In Linux, wildcards and meta-characters are invaluable tools for efficient file manipulation and pattern matching. The concepts and examples presented here explore specific commonly utilized wildcards and metacharacters, accompanied by practical and advanced command examples to demonstrate their usage in real-world scenarios. The material will be useful to a system administrator, power user, end user or student looking to further their knowledge in this area. 

The guide is meant to be utilized by an individual who will be reviewing via demonstration format these core topics.

Contents

Instructor or End User Set-up:

Create Example Files:

Common Wildcards:

Asterisk (*)

Question mark (?)

Square brackets ([])

Curly braces ({})

Tilde (~)

Backslash (\)

Exclamation mark (!)

Common Character Classes:

Asterisk (*)

Question Mark (?)

Range of Characters ([])

[characters]

[!characters]

[[:class:]]:

[[:alnum:]]

[[:alpha:]]

[[:digit:]]

[[:lower:]]

[[:upper:]]

Common Meta-Characters:

Pipe (|)

Greater than (>)

Double greater than (>>)

Less than (<)

Caret (^)

Dollar Sign ($)

Ampersand (&)

Semicolon (;)

Combining Wildcards and Meta-Characters

Conclusion:

About the Author:

Notes:

Linux - Chgrp

The following is a Linux dictionary word of the day:

chgrp – changes group ownership to a said group.

-R parameter for recursive traverse through all contents where command is run from.

Example: chgrp -R root name_of_folder

Linux - Child process

The following is a Linux dictionary word of the day:

child process – process created by another process (which would be the parent process). Each process may create many child processes but will have only one parent process.

Linux - Chfn

The following is a Linux dictionary word of the day:

chfn – utilized to modify finger command based information. The information is stored in the /etc/passwd location. It includes the user's name, work location, work phone number, and home phone number.

Example: chfn

Linux - Checkeq (eqn or neqn)

The following is a Linux dictionary word of the day:

checkeq (eqn or neqn) – command utilized to describe equation aspects.

-v parameter to print version.

Example: eqn hello.c

  

Linux - Cfdisk

The following is a Linux dictionary word of the day:

cfdisk – partition table manipulator for a Linux drive.

m = option used to maximize the disk usage of the current partition.

-h parameter display for help text.

-V parameter to display version information.

Example: cfdisk -V

Linux - CD

The following is a Linux dictionary word of the day:

cd (also can be chdir)  – change directory.

cd .. moves backwards to the next higher subdirectory level.

cd / moves  to the highest root directory level.

Examples:

cd tmp

cd ..

cd /