How Linux Works

Appendix A. Command Classification

This appendix is a guide to the common standard commands. They are organized in the following tables:

• Table A-1

• Table A-2

• Table A-3

• Table A-4

• Table A-5

• Table A-6

• Table A-7

• Table A-8

• Table A-9

Table A-1. File Management Commands

Command	Description
chgrp	Changes a file's group
chmod	Changes a file's permissions
chown	Changes a file's user ownership
cp	Copies a file
dd	Converts and copies
df	Displays disk usage statistics
du	Displays directory space usage
file	Identifies a file type
find	Searches for a file
ln	Creates a symbolic or hard link
ls	Lists files
mkdir	Creates a directory
mkfifo	Creates a named pipe
mknod	Creates a special file
mv	Renames or moves a file
rm	Removes a file
touch	Creates a file or updates a file's timestamp

Table A-2. Text Processing ...