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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 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
What is the proper way to exit a command line program? 2 Take a look at Job Control on UNIX systems If you don't have control of your shell, simply hitting ctrl + C should stop the process If that doesn't work, you can try ctrl + Z and using the jobs and kill -9 %<job #> to kill it The '-9' is a type of signal You can man kill to see a list of signals
unix - Why is 1 1 1970 the epoch time? - Stack Overflow The definition of unix time and the epoch date went through a couple of changes before stabilizing on what it is now But it does not say why exactly 1 1 1970 was chosen in the end
unix - mkdirs -p option - Stack Overflow I'm confused about what the -p option does in Unix I used it for a lab assignment while creating a subdirectory and then another subdirectory within that one It looked like this: mkdir -p cmps012m lab1 This is in a private directory with normal rights (rlidwka) Oh, and would someone mind giving a little explanation of what rlidwka means?
unix - Sort ls output by name - Stack Overflow The beauty of Unix-like tools is you can combine them: ls -l | sort -k9,9 The output of ls -l will look like this -rw-rw-r-- 1 luckydonald luckydonald 532 Feb 21 2017 Makefile -rwxrwxrwx 1 luckydonald luckydonald 4096 Nov 17 23:47 file txt So with 9,9 you sort column 9 up to the column 9, being the file names You have to provide where to stop, which is the same column in this case The