1. A Brief Overview of Unix
Zachary Thacker

2. Online Documentation
The “man” command
man vi
man emacs
man more
etc

3. The Emacs Editor Modes Buffer and Window Point and Mark
Major
Minor
Buffer and Window
Point and Mark
Kill and Yank commands
Ctrl and Meta keys

5. The vi editor “Standard” editor for Unix
Several versions and iterations exist
vim (vi improved)
nvi
elvis
Based on and relies heavily on features and commands of the older “ex” editor
Starting a vi session:
vi [options] file – begins editing file
vi [options] +num file – begins editing file at line num
vi [options] +/pattern file - begins editing file at line matching pattern

6. vi continued
Modes:
Command Mode – default mode, issue editing commands and enter insert mode
Insert Mode – editing mode, entered with the i command
Maneuvering the cursor is done with arrow keys or h, j, k, l keys
H – left
J – down
K – up
L - right

7. sed editor Stands for “stream editor”
Used for making quick or repetitive edits to more than one file
Uses scripts instead of direct input

8. File System Commands ls – list names of all files in current directory
Various modifiers, such as –t to sort by time
cp file1 file2 – copies file1 to file2
mv file1 file2 – moves from file1 to file2, does not make a copy
rm filenames – remove filenames

9. Structure of Directories
root directory – has no parent directory
File pathname - /home/zpt23/CS265/file.txt
“..” represents parent of current directory
“.” represents current directory
Commands:
pwd –displays pathname of current directory
cd – changes current directory, changes to root if no argument given
mkdir name – creates a directory called name in the current directory

10. Permissions Owner, Owner Group, and Everyone Else
Read, write, execute permissions for files
Different for directories…
Read – permission to view contents of directory, for example using the ls command
Write – permission to create/remove file from directory
Execute – permission to cd into that directory

11. Conclusion UNIX is an operating system
Uses various commands and utilities that coexist
Useful for multiuser and multitasking operations

12. Sources
Robbins, Arnold. Unix in a Nutshell, Fourth Edition. North Mankato: O'Reilly Media, Inc., Print. "Understanding UNIX permissions and chmod." Perlfect Solutions. Web. 27 Sept < l> /unix_basics.pdf