What does `kill -0 $pid` in a shell script do?

What does `kill -0 $pid` in a shell script do?

bash shell scripting signals kill

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In what order should I send signals to gracefully shutdown processes?

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Run one command after another, even if I suspend the first one (Ctrl-z)

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How to trap exit code in Bash script

bash signals exit-code bash-trap

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Which signal does ctrl-x send when used in a terminal?

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cygwin ssh gives "Killed by signal 1" on exit

bash ssh cygwin signals

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Ignoring Bash pipefail for error code 141

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How to propagate a signal through a collection of scripts?

bash signals copy-paste kill bash-trap

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Starting a process over ssh using bash and then killing it on sigint

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Unable to trap SIGINT signal in a background shell

bash signals child-process sigint bash-trap

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Bash – How should I idle until I get a signal?

bash signals launchd

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How to send a signal SIGINT from script to script?

bash signals kill bash-trap

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In Bash, how can I run multiple infinitely-running commands and cancel them all with ^C?

bash process signals

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Trap function by passing arguments?

bash shell signals bash-trap

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bash: Why can't I set a trap for SIGINT in a background shell?

bash signals child-process sigint bash-trap

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