Commands by gdelfino

Commands by gdelfino (3)

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count total number of lines of ruby code

Adapted from http://stackoverflow.com/questions/1358540/how-to-count-all-the-lines-of-code-in-a-directory-recursively#answer-1359246
This is sample output - yours may be different.
1

( find ./ -name '*.rb' -print0 | xargs -0 cat ) | wc -l

gdelfino · 2014-01-30 15:35:38 1
Uninstall all gems

This command removes all ruby gems except the default ones that can not be removed. It is based on http://geekystuff.net/2009/01/14/remove-all-ruby-gems/
This is sample output - yours may be different.
-1

gem list | cut -d" " -f1 | grep --invert-match "test-unit\|psych\|io-console\|rdoc\|json\|bigdecimal\|rake\|minitest" | xargs gem uninstall -aIx

gdelfino · 2014-01-10 10:58:59 0

I use it to verify if readline support was specified at compile time. Show Sample Output

ruby -r rbconfig -e 'puts RbConfig::CONFIG["configure_args"]'

gdelfino · 2013-12-04 10:21:35 0

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Getting a domain from url, ex: very nice to get url from squid access.log

Easily decode unix-time (funtion)

A shell function using perl to easily convert Unix-time to text. Put in in your ~/.bashrc or equivalent. Tested on Linux / Solaris Bourne, bash and zsh. using perl 5.6 and higher. (Does not require GNU date like some other commands)

find the path of the java called from the command line

The output will likely point to '/etc/alternatives/java'. So find out where that points by issuing ls -l like this: ls -l /etc/alternatives/java

Start dd and show progress every X seconds

Adjust "sleep X" to your needs. *NOTE: First sleep is required because bash doesn't have a "post-test" syntax (do XXX while).

List all authors of a particular git project

This should work even if the output format changes.

Generate an XKCD #936 style 4 word passphrase (fast)

This restricts things 3 ways: 1. No capitalized words, hence no proper names. 2. No apostrophes. 3. Restricts size to range (3,7)

Auto-log commands

A quick alias I use right before logging into a server so that I have a log of the transactions as well as the ability to re-connect from another computer. Useful for when your boss says "what commands did you run again on that server?" and you had already closed the terminal ;) I wrapped it in a script now, with more features, but this is the heart of it. Never leave home without it.

extract column from csv file

extracts the 5th column using the delimiter ','

Compare a remote dir with a local dir

You can compare directories on two different remote hosts as well: $ diff -y

convert a mp4 video file to mp3 audio file (multiple files)

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