It reads input files line by line, applying the operation which has been specified via the command line (or a sed script), and then outputs the line. Sed ( stream editor) is a Unix utility that parses text files and implements a programming language which can apply textual transformations to such files. A version of the AWK language is a standard feature of nearly every modern UNIX-like operating system. AWK is one of the early tools to appear in Version 7 UNIX and gained popularity as a way to add computational features to a UNIX pipeline. Because of their dense notation, all these languages are often used for writing one-liner programs. The power, terseness, and limitations of AWK programs and sed scripts inspired Larry Wall to write PERL. AWK is an example of a programming language that extensively uses the string data type, associative arrays (that is, arrays indexed by key strings), and regular expressions. awk, when written in all lowercase letters, refers to the UNIX or Plan 9 program that runs other programs written in the AWK programming language. The name AWK is derived from the family names of its authors — Alfred Aho, Peter Weinberger, and Brian Kernighan however, it is not commonly pronounced as a string of separate letters but rather to sound the same as the name of the bird, auk. It has also been ported to Microsoft Windows using the POSIX emulation provided by Cygwin, to MS-DOS by the DJGPP project and to Novell NetWare.ĪWK is a general purpose programming language that is designed for processing text-based data, either in files or data streams, and was created at Bell Labs in the 1970s.
#GET IP ADDRESS VIA BASH ON MAC MAC OS X#
BASH is the default shell on most GNU/Linux systems as well as on Mac OS X and it can be run on most UNIX-like operating systems. In 1990 Chet Ramey became the primary maintainer. The name is a pun on the name of the Bourne shell ( sh), an early and important UNIX shell written by Stephen Bourne and distributed with Version 7 UNIX circa 1978, and the concept of being born again. Its name is an acronym which stands for Bourne-again shell.
#GET IP ADDRESS VIA BASH ON MAC SOFTWARE#
BASH is a free software Unix shell written for the GNU Project.
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