This is assignment and lab work for CSC209 in Summer2018 at University of Toronto, by Hanwen Liang. In each repository, there is pdf file describing what the work did. Software techniques in a Unix-style environment, using scripting languages and a machine-oriented programming language (typically C). What goes on in the operating system when programs are executed.
Core topics: creating and using software tools, pipes and filters, file processing, shell programming, processes, system calls, signals, basic network programming.