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 …
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 …
unix - what does '$?' mean in a shell script? - Stack Overflow
Oct 5, 2012 · 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
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 …
Boolean operators ( &&, -a, ||, -o ) in Bash - Stack Overflow
Dec 8, 2013 · 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 ...
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, 7 months ago Modified 3 years, 7 months ago Viewed 355k times
unix - How to move a running process to background - Stack …
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 …
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bash - Parsing JSON with Unix tools - Stack Overflow
Dec 24, 2009 · The standard POSIX/Single Unix Specification shell is a very limited language which doesn't contain facilities for representing sequences (list or arrays) or associative arrays …
Display curl output in readable JSON format in Unix shell script
May 10, 2017 · Display curl output in readable JSON format in Unix shell script Asked 10 years, 10 months ago Modified 3 months ago Viewed 466k times