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 ating_Systemshttp://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 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 assignment if [ $# -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 echo else … fi

Review week one lab assignment man (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 outcomes Upon 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 assignment Concentric Circle Relationship

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 assignment Users 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 exit 1 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 calls 3 C library functions 4 Special files (usually devices, those found in /dev) and drivers. 5 File formats and conventions 6 Games and screensavers 7 Miscellaneous 8 System administration commands and daemons

Review next lab assignment The grep command searches the named input file(s) for lines containing a match to the given pattern. Normally, each line found is reported to standard output. Demonstrate: grep lines ~dandrear/summer08_solutions/foobar_1 The find command lists all pathnames that are in each of the given directories. Demonstrate: find / -type d –print The above command displays all directory names starting with root in the file system. Demonstrate: find ~dandrear –type d -print

Review next lab assignment Redirect 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 assignment Demonstrate: 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.