Why a long job ignores your Ctrl-C, and the handler that fixes it. Signals, the child processes a script leaves running, and the init that inherits them.
Topic
linux
2 articles in this topic.
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From the universal chmod -R 777 to a directory only the service can touch. Ownership as a number, the rwx bits, and the setgid, sticky and setuid bits the hardened container leans on.