The UNIX® Standard | www.opengroup.org
May 22, 2025 · The success of the UNIX approach led to a large number of “look-alike” operating systems, often divergent in compatibility and interoperability. To address this, vendors and users …
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 …
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unix - Why is 1/1/1970 the "epoch time"? - Stack Overflow
Jun 23, 2011 · 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.
How to convert DOS/Windows newline (CRLF) to Unix newline (LF)
Apr 10, 2010 · How can I programmatically (not using vi) convert DOS/Windows newlines to Unix newlines? The dos2unix and unix2dos commands are not available on certain systems. How can I …
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 …
How can I convert bigint (UNIX timestamp) to datetime in SQL Server?
So far what I understand is the timestamp in ticks the start time of the "Unix epoch" and since the "Unix timestamp" are seconds since that time have passed. So the MSSQL function just does that, it adds …
Single UNIX Specification FAQ - Open Group
Jun 8, 2020 · The Single UNIX Specification is a set of open, consensus specifications that define the requirements for a conformant UNIX system. The standardized programming environment provides a …
How can I pretty-print JSON in a shell script?
Dec 9, 2008 · 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) …
How can I send an email through the UNIX mailx command?
Feb 17, 2010 · From the man page: Sending mail To send a message to one or more people, mailx can be invoked with arguments which are the names of people to whom the mail will be sent. The user is …