The UNIX® Standard | www.opengroup.org
2025年5月22日 · 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 …
unix - what does '$?' mean in a shell script? - Stack Overflow
2012年10月5日 · I came across a shell script that contains a statement like, if [ $val -eq $? ] What does $? mean here?
What are the special dollar sign shell variables? - Stack Overflow
2012年9月14日 · 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 …
What does the line "#!/bin/sh" mean in a UNIX shell script?
2011年9月10日 · 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 …
unix - What is the meaning of "POSIX"? - Stack Overflow
2009年11月23日 · Since every Unix does things a little differently -- Solaris, Mac OS X, IRIX, BSD, and Linux all have their quirks -- POSIX is especially useful to those in the industry as it …
How to check if $? is not equal to zero in unix shell scripting?
How to check if $? is not equal to zero in unix shell scripting? Asked 12 years, 9 months ago Modified 3 years, 9 months ago Viewed 357k times
Newest 'unix' Questions - Stack Overflow
2019年4月10日 · Currently there is a unix-based system that exposes a file in what the team is saying would be {{parameters.secret-path}}/file. I am not sure how to read that in java given …
scripting - What does $$ mean in the shell? - Stack Overflow
2008年9月17日 · Every process in a UNIX like operating system has a (temporarily) unique identifier, the PID. No two processes running at the same time can have the same PID, and $$ …
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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 …
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 …