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Query well known ports list
Uses the file located in /etc/services

Discover full java className for import;
If you want to code without a IDE, using java may be painful to discover correct full class names to import. This script google it with javadoc word, then with some luck we got the javadoc as first item. next it curl the target javadoc and extract full name from it. Can by customized to extract other javadoc infos. Pre-reqs: bash, google-chrome, html2text and core-utils

search string in _all_ revisions

Search for a string inside all files in the current directory
shorter typing with no need to use xargs.

Convert encoding of given files from one encoding to another

convert mp3 into mb4 (audiobook format)
to convert a whole directory, put all mp3 files in a for loop $ for i in $(ls *mp3); do mpg123 -s $i | faac -b 80 -P -X -w -o ${i%mp3}m4b -; done

search installed files of package, that doesn't remember his name well. On rpm systems
rpm, sometimes, is not wildcard friendly. To search files installed from package this could be useful. change PACKAGENAME to any package do you want to search

Fibonacci numbers with awk
Another combination of seq and awk. Not very efficient, but sufficiently quick.

Find files of two different extensions and copy them to a directory

Convert spaces in file names to underscores


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