The "check_mysql_count.pl" plugin can be used to count lines in a MySQL database. It can be used to count either the total number of lines, or the number of lines that meet a certain criterion.

2.6.29 is made up of 11,010,647 lines of code, with the number of developers who contributed to it reaching a record high of 1,166. Unlike the lines of code that make up the kernel, the number of developers has not been constantly climbing.

Wkhtmltopdf is a command line utility for converting webpage / html to PDF.
Features
* Convert web pages into PDF documents using webkit
* Adding headers and footers (static version only)
* TOC generation (static version only)

Way back in April 2008, the Linux Foundation published a little report that upended a lot of perceptions about Linux development. Now, they've done it again. The report in question — Linux Kernel Development: How Fast it is Going, Who is Doing It, What They are Doing, and Who is Sponsoring It? — revealed a number of things about the Linux kernel.

sed can select lines in a file that can be individually modified, printed or deleted. sed is able to select and number any of lines within a file.

Using awk scripts expands the possibilities with awk and provides an easy way to repeat searches on a number of files.

Mass Rename is a simple pair of shell scripts which make it easier to move, rename, or copy multiple files at once. It is intended mainly as an automatic and simple way to rename multiple files with a customizable prefix and a progressive number. It is also possible to modify the rename format simply by editing one of the scripts.

SpamAssassin will use tests to check mail headers, the body, IP Addresses and checksums to locate patterns that indicate SPAM. So SpamAssassin will use pattern-based scores for checking patters that are found in headers, the body or attachments and it will use network-based tests that use DNS lookups or access RBL lists.

Phoronix recently published an article regarding a ~200 lines Linux Kernel patch that improves responsiveness under system strain. Well, Lennart Poettering, a RedHat developer replied to Linus Torvalds on a maling list with an alternative to this patch that does the same thing yet all you have to do is run 2 commands and paste 4 lines in your ~/.bashrc file.