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switch case of a text file

Gets the english pronunciation of a phrase
Usage: say hello world how are you today

get the top 10 longest filenames

grep for tabs without using Ctrl-V trick
-P tells grep to use perl regex matches (only works on the GNU grep as far as I know.)

See loaded modules in apache
Easiest way to check which modules are loaded in apache.

One liner to parse all epubs in a directory and use the calibre ebook-convert utility to convert them to mobi format
all ebook-convert -options are optional. all you really need to pass ebook-convert is the incoming and outgoing names, with extensions. Has been tested on Ubuntu 10.10

parse and format IP:port currently in listen state without net tools
Useful for containers and environments where you need to know if a port is currently in listen mode but you have not easy way or privileges to install net-tools like netstat or ss. "0A" is the code for listen state. The IP hex is reverse order and all in hex format.

Tail a log-file over the network
This one is tried and tested for Ubuntu 12.04. Works great for tailing any file over http.

Shows picture exif GPS info if any and converts coords to a decimal degree number
This oneliner uses Imagemagic's identify utility to show the exif GPS information of an image an also converts Grad/MIn/Sec representation to a decimal degree number

cd to (or operate on) a file across parallel directories
This is useful for quickly jumping around branches in a file system, or operating on a parellel file. This is tested in bash. cd to (substitute in PWD, a for b) where PWD is the bash environmental variable for the "working directory"


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