Here's the list of items that I think need update:
- Ubuntu Unity Desktop -- based on Waylan or Wayland? Consider providing a link to that project.
- Print version information of installed APT utilities with this command: (it's not apt-config -V, but apt-config -v)
- Sometimes while doing sudo apt-get install, I get:
- /var/lib/dpkg/info/bzflag-server.postinst: 6: /var/lib/dpkg/info/bzflag-server.postinst: update-rc.d: not found dpkg: error processing package bzflag-server (--configure): subprocess installed post-installation script returned error exit status 127 dpkg: dependency problems prevent configuration of bzflag: (when I rerun the command by becoming root, there is no error! -- should this be mentioned as a workaround, or what could be the root cause of this issue?)
- In "Using Environment Variables" you say: "The variable ABC exists only in the shell it was created in. If you launch a command from that shell (ls, cat, firefox, and so on), that new process will not see the variable. Start a new bash process and test this:". This is of course correct. But maybe you can say that if you specify the variable on the command line, then it is available to the program, e.g. $ ABC=456 /tmp/xx.sh --> xx.sh will get ABC as a variable with value 456.
- Correct the typo in Chapter 4 (Copying Files): The following command copies an ISO image file from a CD or DVD to your USB flash drive (assuming the drive appears as /dev/sdb1) -- the example uses /dev/sdb9