I think, your texts are really good.
Of course there are quite good sites like
http://tldp.org/LDP/abs/html/
about 'bash' for example and I wrote quite a lot about those subjects myself, but if there's something I'm looking for, I'll give your website a try too.
Lateron it would be nice, if you moved on to covering less documented subjects. In fact, IMHO there's a lot of information about C-programming, that is not covered well in books. For example, I had a lot of pain with C-strings until I came along this hidden page
http://www.howstuffworks.com/c36.htm
It would have been nice too, if someone had told me earlier, that Glib offers 'list'-datatypes for C:
http://library.gnome.org/devel/glib/2.19/glib-Doubly-Linked-Lists.html
C's file-I/O on Linux and Windows isn't covered too well either. Neither compiler-usage (Borland for example). Or debugger-usage. How do you test for memory-leaks of your program, for example (can you do it with "top" ?) ? Or, do the available free garbage-collector-libraries for C work well (and how do you use them) ? And so on ...
There can't be enough tutorials !
Cheerio (Do you say that? The only other thing I know is "Yours sincerely" :mrgreen
.