Presentation Transcript

1. V2012.13
2. Agenda Old Business Delete Files New Business Week 12 Topics: Coming up: Hyland Field Trip: Feb 21st Tiny Circuits/Arduino Review/Demo Linux Intro (continued) Scripts/scripting
3. Future Meeting Preview GAMING OPERATING SYSTEM NETWORK PERIPHERALS STORAGE CLOUD I/O DATA & DATABASES CPU NETWORK GRAPHICS GRAPHICS APP DEVELOPMENT VIRTUAL MEMORY LANGUAGES
4. New Business Tiny Circuits/Arduino Review/Demo Getting Started w/ Arduino Simple Demos Intro to Linux Scripts/scripting Example
5. Basic Commands Commands take the following form: <Command> <Switches> <Parameters> <Target> Switches: single letters, preceded by a hyphen, that adjust what the command does Parameters: things that the command needs to know in order to work Target: the thing (such as a file) that the command will be applied
6. Basic Commands - grep grep
7. Create Your First Script Open a text editor Menu->Accessories->gedit Scripts always begin with: #! /bin/bash Save your script (date.sh) Make the script executable $ chmod +x date.sh Run your script $ ./date.sh
8. Create Your First Script Output $ ./date.sh Fri Mar 8 13:27:05 EST 2013
9. Create Your First Script Your Challenge: Let’s add some features Display only the date Display the Day
10. Create Your First Script
11. Create Your First Script (date.sh) Output $ ./date.sh Today's date is: March 8 The day of the week is: Friday The year is: 2013 The complete date is: Friday, March 8, 2013
12. Create Your First Script (date.sh) #!/bin/sh echo -n "Today's date is: "; date +"%B %-d" echo -n "The day of the week is: "; date +"%A" echo -n "The year is: "; date +"%Y" echo -n "The complete date is: "; date +"%A, %B %-d, %Y"
13. Script to Display Memory (mem.sh) #! /bin/bash # Total memory space details echo "Memory Space Details" free -t -m | grep "Total" | awk '{ print "Total Memory space : "$2 " MB"; print "Used Memory Space : "$3" MB"; print "Free Memory : "$4" MB"; }' echo "Swap memory Details" free -t -m | grep "Swap" | awk '{ print "Total Swap space : "$2 " MB"; print "Used Swap Space : "$3" MB"; print "Free Swap : "$4" MB";