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  • The UNIX® Standard | www. opengroup. org
    Single UNIX Specification- “The Standard” The Single UNIX Specification is the standard in which the core interfaces of a UNIX OS are measured The UNIX standard includes a rich feature set, and its core volumes are simultaneously the IEEE Portable Operating System Interface (POSIX) standard and the ISO IEC 9945 standard
  • What are the special dollar sign shell variables? - Stack Overflow
    In Bash, there appear to be several variables which hold special, consistently-meaning values For instance, myprogram amp;; echo $! will return the PID of the process which backgrounded myprog
  • unix - what does $? mean in a shell script? - Stack Overflow
    I came across a shell script that contains a statement like, if [ $val -eq $? ] What does $? mean here?
  • What does the line #! bin sh mean in a UNIX shell script?
    When you try to execute a program in unix (one with the executable bit set), the operating system will look at the first few bytes of the file These form the so-called "magic number", which can be used to decide the format of the program and how to execute it
  • linux - What does $@ mean in a shell script? - Stack Overflow
    What does a dollar sign followed by an at-sign (@) mean in a shell script? For example: umbrella_corp_options $@
  • UNIX® Systems | www. opengroup. org
    This is an opportunity for leading UNIX system suppliers suppliers to acquire state-of-the-art test tools to ensure the development of conformant UNIX® System products and to demonstrate their conformance through the UNIX certification program The Open Group is well established as the premier open systems test supplier and certification
  • www. opengroup. org
    About Us The Open Group is a global consortium that enables the achievement of business objectives through technology standards and open source initiatives by fostering a culture of collaboration, inclusivity, and mutual respect among our diverse group of 900+ memberships Our Membership includes customers, systems and solutions suppliers, tool vendors, integrators, academics, and consultants
  • How can I pretty-print JSON in a shell script?
    I've created an alias: alias pretty='python -mjson tool | pygmentize -l json so that I can just run: command params | pretty Hope this helps PS: Should anyone manages to extend this to a) remove the curl-output I'm seeing every time and or b) NOT sort the json keys; please do let me know, I will be highly thankful
  • unix - How can I kill a process running on particular port in Linux . . .
    To list any process listening to the port 8080: lsof -i:8080 To kill any process listening to the port 8080: kill $(lsof -t -i:8080) or more violently: kill -9 $(lsof -t -i:8080) (-9 corresponds to the SIGKILL - terminate immediately hard kill signal: see List of Kill Signals and What is the purpose of the -9 option in the kill command? If no signal is specified to kill, the TERM signal a k a





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