The best way to learn about eBPF is to read the book “What is eBPF” by Liz Rice.
And the best way to have your first experience with eBPF programming is
to walk through this lab, which takes the opensnoop example out of the
book and teaches you to handle an eBPF tool, watch it loading its
components and even add your own tracing into the source eBPF code. visit
this site and get your hands dirty ;)
Traditionally, Unix/Linux/POSIX filenames can be almost any sequence of bytes, and their meaning is unassigned. The only real rules are that "/" is always the directory separator, and that filenames can't contain byte 0 (because this is the terminator). Although this is flexible, this creates many unnecessary problems. In particular, this lack of limitations makes it unnecessarily difficult to write correct programs (enabling many security flaws), makes it impossible to consistently and accurately display filenames, causes portability problems, and confuses users. more ....
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