cd desktop here is sequence on my computer after starting terminal (skipping most of the output from lslast loginsat may : : on ttys anh@lucky (anh@lucky ):~pwd /users/anh anh@lucky (anh@lucky ):~ls desktop documents downloads anh@lucky (anh@lucky ):~cd desktop anh@lucky (anh@lucky ):~/desktoppwd /users/anh/desktop anh@lucky (anh@lucky ):~/desktopcd anh@lucky (anh@lucky ):~pwd /users/anh anh@lucky (anh@lucky ):~notice that the last use of the cd command used directory that stands for the parent directorythe directory containing the current directory if you unzipped examples zip from your desktopyou can go to the exaples with cd ~/desktop/examples alter this if you put your examples somewhere elseit is useful to be in the examples folder if you start idle from thereit is easy to open any of the example programs when scripts are directly called by the operating systemthey look for the proper interpreter to read them our scripts are set up to look for python to start regular python program from the current directorylike hello_you pyyou would enter command with python and the file namelike python hello_you py instead of shifting to separate shell as in idlethe output appears right in the terminal window html source markup the section web page basics (page compares html format with other document formats here we concentrate on htmlhypertext markup language use convenient plain text editorsublime text (free download at syntax of html sourcemuch as idle colors python syntax this is an advantage over kompozer unlike hybrid editors such as kompozerthe editor only shows the raw html textnot the way it looks in browser with plain text editor like thisyou have couple extra steps to look at the formatted viewyou need to save the fileand separately load it into browser if you make change to the html sourceand want to see what that changes in the browser viewthen you need to save the source file againand then get the browser to reload the page html source markup