rng
rng streams input from a file or stdin to stdout.
It is the love child of sed -n '<START>,<END>p', head -n, and tail -n.
Table of Contents
Installation
You can install rng via Homebrew or manually.
Homebrew
brew tap nickolasburr/pfa
brew install rng
Source
git clone https://github.com/nickolasburr/rng.git
cd rng
make
make install
By default, files are installed to /usr/local You can install to an alternate location by passing PREFIX to make install.
For example, make install PREFIX=/opt
Notes
Certain range values can be omitted if they can be properly implied. To get multiple ranges, use the colon (:) operator.
Examples
Get lines 7-15 in Makefile.
rng 7,15 Makefile
Skip the first 4 lines of input from a pipe.
echo -e "First\nSecond\nThird\nFourth\nFifth" | rng 5
Output lines 1-25 in Makefile.
rng ,25 Makefile
Get lines 5-10 and 17-22 in main.c.
rng 5,10:17,22 main.c
Output all lines except 11-19 in main.c
rng ,10:20, main.c
Get lines 16-27 of a text document from the web.
curl -fsL https://www.w3.org/TR/PNG/iso_8859-1.txt | rng 16,27