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 …

Nov 23, 2009 · 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 …

Feb 17, 2010 · How can I send an email through the UNIX mailx command? Asked 15 years, 10 months ago Modified 6 years, 1 month ago Viewed 809k times

Sep 8, 2010 · I want to list only the directories in specified path (ls doesn't have such option). Also, can this be done with a single line command?

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 …

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 …

Apr 8, 2009 · I assume everyone here is familiar with the adage that all text files should end with a newline. I've known of this "rule" for years but I've always wondered — why?

Dec 8, 2008 · In Unix/Linux, how do you find out what group a given user is in via command line?

UNIX certification is a trusted and open system industry standard, ensuring that products conform to the most exacting criteria for portability, compatibility, and global interoperability.

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 …