Ownership and Permissions

Once you’ve got the hang of users, you need to learn about ownership and permissions. Different users have different areas of ownership and can do different things with each file. Permissions in Linux can be quite complex but with careful thought it’s not too difficult.

OWNER AND PRIVILEGE Each user account in Linux is an owner of a section of the filesystem: their Home area. Within this area, they do what they like (within reason), as they have owner privileges. Elsewhere though, they usually just have read-only privileges. STEP 1 If you followed the previous tutorial you should now have two accounts on your Raspberry Pi. One called “pi” and the other with a name (Lucy in our case). An essential aspect of Linux is the idea of file and directory ownership; who owns, and has access, to what. You need a test file so enter: touch testfile. STEP 2 Now enter: ls –l and let’s have a good look at the default permissions file. Our testfile.txt files starts with the text “-rw-r--r—“. Start with the…

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Raspberry Pi Coding & Projects The Complete Manual (Digital) - 1 Issue, Issue 6

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