HCI 454

Code-based Interactions

Code-based interaction uses symbolic content to express actions and their referents.

Document/text formatting
- html/css
- tex/latex (example online editor)
Process scheduling
Unix Cron commands:

01 * * * * root echo "This command is run at one min past every hour" 17 8 * * * root echo "This command is run daily at 8:17 am" 17 20 * * * root echo "This command is run daily at 8:17 pm" 00 4 * * 0 root echo "This command is run at 4 am every Sunday" * 4 * * Sun root echo "So is this" 42 4 1 * * root echo "This command is run 4:42 am every 1st of the month" 01 * 19 07 * root echo "This command is run hourly on the 19th of July"
File permissions

Example for giving read/write access to group and everyone else

chmod og=rw publicity.html