The UNIX® Standard | www.opengroup.org
May 22, 2025 · 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 set, and its core volumes …
bash - Shell equality operators (=, ==, -eq) - Stack Overflow
unix bash shell script equal comparison operator is not comparing. 1. Equal and not equal operators not ...
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 - How to check permissions of a specific directory ... - Stack ...
In GNU/Linux, try to use ls, namei, getfacl, stat.. For Dir [flying@lempstacker ~]$ ls -ldh /tmp drwxrwxrwt. 23 root root 4.0K Nov 8 15:41 /tmp [flying@lempstacker ~]$ namei -l /tmp f: /tmp …
unix - How to use echo command to print out content of a text file ...
you could use echo command with cat as command substitution. However, it will replace CR or return (unix: \n) with spaces: $ echo $(cat names.txt) Homer Marge Bart Lisa Maggie Could be …
unix - Diff files present in two different directories - Stack Overflow
Nov 9, 2012 · I have two directories with the same list of files. I need to compare all the files present in both the directories using the diff command. Is there a simple command line option …
linux - How can I recursively find all files in current and subfolders ...
May 5, 2011 · The default way to search for files recursively, and available in most cases is. find . -name "filepattern" It starts recursively traversing for filename or pattern from within the current …
unix - What is the difference between a symbolic link and a hard …
Oct 9, 2008 · Microsoft has implemented its symbolic links to function just like UNIX links. Symbolic links can either be absolute or relative links. Absolute links are links that specify …
unix - How to kill a process running on particular port in Linux ...
Jul 20, 2012 · I tried to close the tomcat using ./shutdown.sh from tomcat /bin directory. But found that the server was not closed properly. And thus I was unable to restartMy tomcat is running …
How to redirect output to a file and stdout - Stack Overflow
Jun 19, 2014 · @WilliamPursell I'm not sure your clarification improves things :-) How about this: OP is asking if it's possible to direct the called program's stdout to both a file and the calling …