Search and Replace in Multiple Files Using Single Command

http://systembash.com/content/easy-search-and-replace-in-multiple-files-on-linux-command-line/

Custom timeout for Net::HTTP Requests in Ruby

http = Net::HTTP.new(host, port)
http.read_timeout = "timeout in milliseconds"

Open current directory in terminal from nautilus

install nautilus-open-terminal.
1 . sudo apt-get install nautilus-open-terminal.
2 . logout and login or give "nautilus -q" in terminal.


Now in your right-click menu you can open a terminal, and it will be in what ever directory you are currently in in Nautilus

Partial deploy using capistrano

Real projects are big and often have several megabytes of code. Sometimes, you need to quickly apply a ‘hotfix’ for a critical bug. Usually, a fix like that is small enough (containing only several lines of code) and affects only a part of the application. If so. it’s not necessary to restart the whole application – you need to restart only part of the running processes. In the end, you don’t need to go through the entire deployment process.


check this out  http://blog.railsware.com/2011/10/25/delivery-via-patch/

Ctrl+C to exit from exception ruby

rescue SystemExit, Interrupt
  raise

rescue Exception => e
  #...
end

you can use SystemExit, Interrupt classes to exit from script with Ctrl+C

Require vs Load ruby

http://www.skorks.com/2009/08/digging-into-a-ruby-installation-require-vs-load/

IndexError: string not matched ruby hash

irb(main):001:0> s = "string"

=> "string"

irb(main):006:0> s[ 'hi' ] = 'foo'

IndexError: string not matched

        from (irb):6:in 

Here you already declared 's' as string then you can't use it as hash.