Shuzheng questions

• Is it possible to make writeable variables in .text segment using DB directive in NASM?
• What's the purpose of actions/checkout@v3, when the repository is already checked out on job start?
• How to restart nginx service in Docker nginx image (`service nginx restart`) without container stopping?
• How is SizeOfImage in the PE optional header computed?
• How do I determine if an EXE (or DLL) participate in ASLR, i.e. is relocatable?
• How does the `-n` option to `image lookup` in LLDB operate compared to the `-s` option?
• How to see man page of `read` command when only `read(2)` shows up by `whatis` in Bash?
• What is the "-z" option of Clang and why is it needed?
• How to make Vim autocomplete a word based on words already found in the buffer?
• What is the GS register used for on Windows? [duplicate]

Shuzheng answers