20191222 The shuf command will select random lines for the specified file.
$ shuf -n 10 myfile.txt
To select the Nth line from a file (replacing N with the line number you want):
$ sed 'Nq;d' myfile.txt
Your donation will support ongoing availability and give you access to the PDF version of this book. Desktop Survival Guides include Data Science, GNU/Linux, and MLHub. Books available on Amazon include Data Mining with Rattle and Essentials of Data Science. Popular open source software includes rattle, wajig, and mlhub. Hosted by Togaware, a pioneer of free and open source software since 1984. Copyright © 1995-2022 Graham.Williams@togaware.com Creative Commons Attribution-ShareAlike 4.0