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Count lines in large files

I commonly work with text files of ~20 Gb size and I find myself counting the number of lines in a given file very often. The way I do it now it’s just cat fname | wc -l, and it takes very long. Is there any solution that’d be much faster? I work in a high performance cluster with Hadoop

Better bash script to create directory structure

I want to create folders with plain text with a structure like: I thought about using a base command like mkdir and found that post : Bash script that creates a directory structure, but it still needs to write structure like : So I would need to change the regex used in : What bash command could I use to

perl byte code generation with too many file.pl

How to make perl bytecode if sub is there in another file.pl so that I can get all perl script in to binary to give for usage but I am getting codedump warning. Here is the example how I have done! File: add.pl File: util.pl Then when I run: I get I also tried but it says Note: If both

Maven Multiple platform dependent Packages

I have written an application in Java that can be used on both Linux and Windows. Currently by running mvn package, my maven build system will generate a .msi using WiX. Is there a way of creating two package ‘tasks’ so I can say either mvn package-windows ormvn package-linux` Answer If you want t…