The UNIX® Standard | www.opengroup.org
May 22, 2025 · 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 …
What are the special dollar sign shell variables? - Stack Overflow
Sep 14, 2012 · In Bash, there appear to be several variables which hold special, consistently-meaning values. For instance, ./myprogram &; echo $! will return the PID of the process which …
What does the line "#!/bin/sh" mean in a UNIX shell script?
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. These form the so-called "magic number", …
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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, …
Converting unix time into date-time via excel - Stack Overflow
Explanation Unix system represent a point in time as a number. Specifically the number of seconds* since a zero-time called the Unix epoch which is 1/1/1970 00:00 UTC/GMT. This number of seconds …
Difference between CR LF, LF and CR line break types
Oct 12, 2009 · I'd like to know the difference (with examples if possible) between CR LF (Windows), LF (Unix) and CR (Macintosh) line break types.
unix - What are file descriptors, explained in simple terms? - Stack ...
Mar 10, 2011 · 42 File Descriptors (FD) In Linux/Unix, everything is a file. Regular "files", directories, and even devices are files. Every file has an associated number called the file descriptor (FD), a non …
How can I convert bigint (UNIX timestamp) to datetime in SQL Server?
Adding n seconds to 1970-01-01 will give you a UTC date because n – the Unix timestamp – is the number of seconds that have elapsed since 00:00:00 Coordinated Universal Time (UTC), Thursday, …
Boolean operators ( &&, -a, ||, -o ) in Bash - Stack Overflow
Dec 8, 2013 · 80 What is the difference between the &&, ||, -a, and -o Unix operators? What are the restrictions on the usage of both types? Is it simply that the && and || operators should be used when …
How to get the unix timestamp in C# - Stack Overflow
Jan 1, 2001 · I have had look around stackoverflow, and even looked at some of the suggested questions and none seem to answer, how do you get a unix timestamp in C#?