Apr 10, 2019 · Check if directory exists on a unix server, if not create and move files to, using C# [closed] If had a look but can't find much nformation on how to check if a directory exists on a unix server, if it doesn't then create and copy files to using c#. Oct 5, 2012 · I came across a shell script that contains a statement like, if [ $val -eq $? ] What does $? mean here? Sep 14, 2012 · In Bash, there appear to be several variables which hold special, consistently-meaning values. For instance, . . These form the so-called "magic number", which can be used to decide the format of the program and how to execute it. Specifically the number of seconds* since a zero-time called the Unix epoch which is 1/1/1970 00:00 UTC/GMT. Our Membership includes customers, systems and solutions suppliers, tool vendors, integrators, academics, and consultants How to check if $? is not equal to zero in unix shell scripting? Asked 12 years, 10 months ago Modified 3 years, 10 months ago Viewed 357k times Explanation Unix system represent a point in time as a number. /myprogram &; echo $! will return the PID of the process which backgrounded myprog Sep 10, 2011 · 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. 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. But it does not say why exactly 1/1/1970 was chosen in the end.

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