Agenda•Link of the week•Use of Virtual Machine•Review week one lab assignment•This week’s expected outcomes•Review next lab assignments •Break Out Problems•Upcoming Deadlines•Questions and answers

Link of the week• http://dmoz.org/Computers/Software/Oper

ating_Systems• Definition of Operating System (OS)• Basic tasks performed by an operating

system– Control and allocate memory– Prioritize system requests– Control input and output devices– Facilitate networking and management file

systems

Link of the week• Services an Operating System (OS)

performs– Process management

Demonstrate test_file.txt on cs.franklin.edu– Memory management

OS coordinates various types of memory – File systems– Networking – Graphical user interface (GUI) and command line– Device drivers– Security

• Internal management• External management

Use of the Virtual Machine• Received two CD’s from Franklin University. Use

the ITEC 400 Virtual Machine CD to install your Knoppix 5.1.1 software.

• Why is Knoppix OS being utilized in this course?• Knoppix features• Review VMware Desktop using Franklin Live• Demonstrate how to ftp a file from your

computer to Einstein using VMware software

Review week one lab assignment

if [ ]then

…fi

while [ ]do …done

for file_name in *do …

done

$1, $2, $3

cd $1

Review week one lab assignmentif [ $# -ne 1 ]then …

…

elif [ $1 -gt 0 ]then

while [ $variable -gt 0 ] do echo -n $variable if [ $variable -gt 1 ] then … fi VARIABLE=$(( $VARIABLE - 1)) done echoelse … …fi

Review week one lab assignmentman (use “q” to terminate view)

ls –l

ps

cut –f 9

cut –c 1-7

wc -l

$#

date

exit 0

exit 1

NUMBER=$2

echo $NUMBER

less

Weeks 2 and 3 expected outcomesUpon successful completion of this module,

the student will be able to:

• Create scripts using shell variables and program control flow.

• Use man page system and find script tools.

• Use redirection and pipes to combine scripts and executables.

Review next lab assignmentConcentric Circle Relationship

KERNELHARDWARE

Shell

Utilities

Kernel

csh

sort

ps

vi

Review next lab assignment

• Use the editor of your choice to open and save a file.

vi test_file.txt

o (insert text - alpha character)

Esc key (exit insert mode)

:wq! (save text entered in file)

:q! (quit without saving changes)• echo $NUMBER• myArray[1]=$1

Review next lab assignmentUsers can connect the standard output of one

command into the standard input of another command by using the pipeline operator (|).

• ps –ef | wc –l• ps –ef | awk ‘{print $1}’• who (users who are logged on)• who –b (time of last system boot)• who –d (print dead processes)• who –r (print current run level)• Each command has a return value.

0 indicates a normal exit1 indicates a failed exit

The return value of a command can be used with conditional or iteration commands.

Review next lab assignment• A process associates a number with each file that it has opened. This

number is called a file descriptor. When you log in, your first process has the following three open files connected to your terminal.

Standard input: File descriptor 0 is open for reading.Standard output: File descriptor 1 is open for writing.Standard error: File descriptor 2 is open reading.

• Linux command documentation is known as man. Each page is a self-contained document. The Manual sections are split into eight numbered sections:

1 General commands.2 System calls3 C library functions4 Special files (usually devices, those found in /dev) and

drivers.5 File formats and conventions6 Games and screensavers7 Miscellaneous8 System administration commands and daemons

Review next lab assignment• The grep command searches the named

input file(s) for lines containing a match tothe given pattern. Normally, each line foundis reported to standard output.

Demonstrate: grep lines ~dandrear/summer08_solutions/foobar_1

• The find command lists all pathnames thatare in each of the given directories.

Demonstrate: find / -type d –printThe above command displays all directorynames starting with root in the file system.Demonstrate: find ~dandrear –type d -print

Review next lab assignmentRedirect the standard output of a command

to a file.

• date > /tmp/date_saved

Redirect the standard input of a command so that it reads from a file instead of from your terminal.

• mail dandrear < ~dandrear/summer08_solutions/report.txt

Append the standard output of a command to a file.

• cat foobar_2 >> foobar_1

Review next lab assignmentDemonstrate: srch

• Code one small script function at a time.

• Test that function before adding more code to the script.

• Program coding is an iterative process (code,test,code,test,code,test, …).

Break Out Problems• ps | wc –l• who | awk ‘{print $1}‘ | sort –u | wc –l• ps –ef | awk ‘{print $1}’ | sort –u | wc –l• sort –r names.txt• ps –ef | awk ‘{print $9, $1}’ • find /bin -name gzip• find /etc -name motd• > newfile• rm newfile• date | cut –c12-19• nohup grep This ~dandrear/summer08_solutions/report.txt &• cp test_data.txt ~dandrea/temp• mv test_data.txt ~dandrear/temp• printf $NUMBER• Script: ~dandrear/summer08_solutions/person.sh

#!/bin/ksh person=`who | grep $1` echo $person

Upcoming Deadlines

• Simple Shell scripts, Lab Assignment 2-1 due 5/18/08.

• Provide your proctor information by 5/17/08.• Verify that your login is correct on Einstein.• Configure your directory structure on Einstein to

comply with course specifications.• Advanced Scripting, Lab Assignment 4-1 due

5/25/08.

Questions and answers

• Questions

• Comments

• Concerns

• After class I will help students with their scripts.