User:Inge Hoonte/Dummies, the sequel

oct 21 intro

-> 4 dummies attending. Evo starts with showing Dutch Design Week project. Making a physical poster. Take pictures from above. Installation with camera above + lights, and flatbed underneath it. Arduino and button to control camera. PVC pipes run from platform to flatbed with all cables (unstable).

Without button: connect wires to test Arduino
leave test script on computer there to see if button is working
Arduino: take picture
python script: kill P2P camera program so iPhoto doesn't open. Instead open gPhoto. save it, write it, etc

grep "bla" *
ps ax | grep "PTPCamera" 
// returns camera number 752
kill -9 752
ps ax | grep "PTPCamera" | grep -v "grep"
gphoto2 -a

work with PIL and ImageMagick
copy to temporary directory: folder of web page. For open day this was written in AppleScript, now in gPhoto: free software to communicate with digital cameras.
rotate picture 90 degrees
Copy to local image gallery
refresh browser -> chrome script (command shift f)
also set up default start-up, and kiosk for browser, full-screen browser etc etc

Evo's favorite commands

ls
cp = copy (scp = secure copy)
mv = move
mkdir = make dir
cd = change directory
rm
grep = look for? eg: grep "bla" * //searches for bla everywhere in that directory 
find
man
watch = magic! 
sed = search and replace
cat = binary file tries to output it anyway. metadata. concatenate files and print on the standard output
echo
less = Less is a program similar to more (1), but which allows  backward  movement in the file as well as forward movement. 

|
>
>>
* = everything that ends in... 

ctrl + c
cd ~  = evo go home

example:
ls -al ~ = show all 
mv *.jpg ~/pics/
rm -rf pics
grep “bla” *
find -name “*bla*”
mkdir test
echo bla > bla.txt
echo blabla >> bla.txt
cat /var/log/auth.log |less

cp copy all python files: cp Documents/.../*.py

copyall python files that start with start and save as different file name: cp Docu.../start*.py ~/.../*

recursive: all folders and sub trees in it: cp -R