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List of Kill Signals - Unix Linux Stack Exchange SIGHUP 1 Term Hangup detected on controlling terminal or death of controlling process SIGINT 2 Term Interrupt from keyboard SIGQUIT 3 Core Quit from keyboard SIGILL 4 Core Illegal Instruction SIGABRT 6 Core Abort signal from abort(3)
linux - Background process and SIGHUP - Super User My understanding is that a program that is associated with a BASH terminal will receive the SIGHUP signal if that terminal is closed This usually will terminate the program I also know that you
Do background processes get a SIGHUP when logging off? Verified When I performed an "exit", "logout", or CTL-D the child proc (job) would not receive a sighup (both root and reg user) However when I did "kill -HUP $$" to kill the current instance of bash the child processes DID receive a sighup I then set huponexit and the child process did receive SIGHUP upon exit
In which cases is SIGHUP not sent to a job when you log out? In addition to whether or not SIGHUP is sent, whether a process has defined a signal handler (and catches SIGHUP) or signal mask are additional factors in whether it is terminated when sent that signal
How to use SIGHUP for reloading services? - Server Fault Vault is telling you the tls_key_file file name cannot be changed after start, and the certificate contents can be reloaded if you send it a SIGHUP Your systemd unit sends a SIGHUP if the unit is reloaded, a common pattern for services where that is a reload signal Additional logic is needed, as Vault is not monitoring the file for changes I suggest reloading vault service in your
What causes various signals to be sent? - Unix Linux Stack Exchange SIGHUP is sent to signal that the terminal has disappeared (historically because your modem had h ung up, nowadays usually because you've closed the terminal emulator window) Some processor traps can generate a signal The details are architecture and system dependent; here are typical examples: SIGBUS for an unaligned access memory;
bash - SIGHUP strange behavior - Unix Linux Stack Exchange The shell itself handles SIGHUP, and the signal handler forwards the SIGHUP to all background processes so they, too, are informed that the controlling terminal has gone away Any processes that leave the default handler will terminate here, typically these are shell commands that require the terminal
Difference between nohup, disown and - Unix Linux Stack Exchange Using causes the program to run in the background, so you'll get a new shell prompt instead of blocking until the program ends nohup and disown are largely unrelated; they suppress SIGHUP (hangup) signals so the program isn't automatically killed when the controlling terminal is closed nohup does this when the job first begins If you don't nohup a job when it begins, you can use disown to
Why do we need to send SIGHUP to a newly orphaned process group . . . In order to avoid this problem, newly orphaned process groups that contain stopped processes are sent a SIGHUP signal and a SIGCONT signal to indicate that they have been disconnected from their session The SIGHUP signal causes the process group members to terminate unless they are catching or ignoring SIGHUP