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 …

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 …

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", …

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, …

I have a terminal connected to an external machine through ssh and have a process running in it. Is it possible move the execution to the background, so that I can close the ssh connection without...

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.

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 …

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.

To combine stderr and stdout into the stdout stream, we append this to a command: 2>&1 For example, the following command shows the first few errors from compiling main.cpp: g++ main.cpp …

Jun 6, 2013 · How do I find all files containing a specific string of text within their file contents? The following doesn't work. It seems to display every single file in the system. find / -type f -exec grep -H '