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 …

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 defines a …

How to check if $? is not equal to zero in unix shell scripting? Asked 12 years, 9 months ago Modified 3 years, 9 months ago Viewed 357k times

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.

Adding n seconds to 1970-01-01 will give you a UTC date because n – the Unix timestamp – is the number of seconds that have elapsed since 00:00:00 Coordinated Universal Time (UTC), Thursday, …

I know that using ls -l "directory/directory/filename" tells me the permissions of a file. How do I do the same on a directory? I could obviously use ls -l on the directory higher in the hierarchy...

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 luckydonald …

Dec 4, 2013 · Multiple files of a directory or an entire directory tree can be converted from DOS/Windows to UNIX text files by using command FOR to CALL batch file JREPL.BAT on each file …

Very few systems have a dedicated sh, instead making it a link to other another shell. Ideally, such a shell invoked as sh would only support those features in the POSIX standard, but by default let some …

Jul 20, 2012 · Use the command sudo netstat -plten |grep java used grep java as tomcat uses java as their processes. It will show the list of processes with port number and process id tcp6 0 0 :::8080 :::* …