λ nohup --helpUsage: nohup COMMAND [ARG]...  or:  nohup OPTIONRun COMMAND, ignoring hangup signals.      --help     display this help and exit      --version  output version information and exitIf standard input is a terminal, redirect it from an unreadable file.If standard output is a terminal, append output to 'nohup.out' if possible,'$HOME/nohup.out' otherwise.If standard error is a terminal, redirect it to standard output.To save output to FILE, use 'nohup COMMAND > FILE'.NOTE: your shell may have its own version of nohup, which usually supersedesthe version described here.  Please refer to your shell's documentationfor details about the options it supports.GNU coreutils online help: 
    Report nohup translation bugs to 
    Full documentation at: 
    
     or available locally via: info '(coreutils) nohup invocation'
    

开启不挂起的服务, ssh退出后依然运行服务

nohup python3 main.py --cmd=runserver