For some reason I got this error last night when I tried to run gem install berkshelf

    $ gem install berkshelf
    ERROR:  While executing gem ... (Errno::EHOSTDOWN)
        Host is down - sendto(2) for "10.0.1.4" port 53

It is apparently OK today:

    $ gem install berkshelf
    Fetching: nio4r-1.1.0.gem (100%)
    Building native extensions.  This could take a while...
    Successfully installed nio4r-1.1.0
    Fetching: celluloid-io-0.16.2.gem (100%)
    Successfully installed celluloid-io-0.16.2
    Fetching: addressable-2.3.7.gem (100%)
    Successfully installed addressable-2.3.7
    Fetching: multipart-post-2.0.0.gem (100%)
    Successfully installed multipart-post-2.0.0
    Fetching: faraday-0.9.1.gem (100%)
    Successfully installed faraday-0.9.1
    Fetching: sawyer-0.6.0.gem (100%)
    Successfully installed sawyer-0.6.0
    Fetching: octokit-3.7.1.gem (100%)
    Successfully installed octokit-3.7.1
    Fetching: dep-selector-libgecode-1.0.2.gem (100%)
    Building native extensions.  This could take a while...
    Successfully installed dep-selector-libgecode-1.0.2
    Fetching: dep_selector-1.0.3.gem (100%)
    Building native extensions.  This could take a while...
    Successfully installed dep_selector-1.0.3
    Fetching: semverse-1.2.1.gem (100%)
    Successfully installed semverse-1.2.1
    Fetching: solve-1.2.1.gem (100%)
    Successfully installed solve-1.2.1
    Fetching: retryable-2.0.1.gem (100%)
    Successfully installed retryable-2.0.1
    Fetching: net-http-persistent-2.9.4.gem (100%)
    Successfully installed net-http-persistent-2.9.4
    Fetching: mixlib-log-1.6.0.gem (100%)
    Successfully installed mixlib-log-1.6.0
    Fetching: mixlib-authentication-1.3.0.gem (100%)
    Successfully installed mixlib-authentication-1.3.0
    Fetching: hashie-2.1.2.gem (100%)
    Successfully installed hashie-2.1.2
    Fetching: buff-ruby_engine-0.1.0.gem (100%)
    Successfully installed buff-ruby_engine-0.1.0
    Fetching: buff-shell_out-0.2.0.gem (100%)
    Successfully installed buff-shell_out-0.2.0
    Fetching: buff-ignore-1.1.1.gem (100%)
    Successfully installed buff-ignore-1.1.1
    Fetching: buff-extensions-1.0.0.gem (100%)
    Successfully installed buff-extensions-1.0.0
    Fetching: varia_model-0.4.0.gem (100%)
    Successfully installed varia_model-0.4.0
    Fetching: buff-config-1.0.1.gem (100%)
    Successfully installed buff-config-1.0.1
    Fetching: ridley-4.1.2.gem (100%)
    Successfully installed ridley-4.1.2
    Fetching: minitar-0.5.4.gem (100%)
    Successfully installed minitar-0.5.4
    Fetching: cleanroom-1.0.0.gem (100%)
    Successfully installed cleanroom-1.0.0
    Fetching: berkshelf-api-client-1.2.1.gem (100%)
    Successfully installed berkshelf-api-client-1.2.1
    Fetching: berkshelf-3.2.3.gem (100%)
    Successfully installed berkshelf-3.2.3
    Parsing documentation for nio4r-1.1.0
    Installing ri documentation for nio4r-1.1.0
    Parsing documentation for celluloid-io-0.16.2
    Installing ri documentation for celluloid-io-0.16.2
    Parsing documentation for addressable-2.3.7
    Installing ri documentation for addressable-2.3.7
    invalid options: -SHN
    (invalid options are ignored)
    Parsing documentation for multipart-post-2.0.0
    Installing ri documentation for multipart-post-2.0.0
    Parsing documentation for faraday-0.9.1
    Installing ri documentation for faraday-0.9.1
    Parsing documentation for sawyer-0.6.0
    Installing ri documentation for sawyer-0.6.0
    Parsing documentation for octokit-3.7.1
    Installing ri documentation for octokit-3.7.1
    Parsing documentation for dep-selector-libgecode-1.0.2
    unable to convert "\xEB" from ASCII-8BIT to UTF-8 for ext/libgecode3/vendor/gecode-3.7.3/changelog.in, skipping
    unable to convert "\x8E" from ASCII-8BIT to UTF-8 for ext/libgecode3/vendor/gecode-3.7.3/contribs/qecode/QCOPPlus.cc, skipping
    unable to convert "\xFC" from ASCII-8BIT to UTF-8 for ext/libgecode3/vendor/gecode-3.7.3/examples/bin-packing.cpp, skipping
    unable to convert "\xEA" from ASCII-8BIT to UTF-8 for ext/libgecode3/vendor/gecode-3.7.3/examples/black-hole.cpp, skipping
    unable to convert "\xD6" from ASCII-8BIT to UTF-8 for ext/libgecode3/vendor/gecode-3.7.3/examples/dominating-queens.cpp, skipping
    unable to convert "\xEF" from ASCII-8BIT to UTF-8 for ext/libgecode3/vendor/gecode-3.7.3/gecode.m4, skipping
    unable to convert "\xED" from ASCII-8BIT to UTF-8 for ext/libgecode3/vendor/gecode-3.7.3/gecode/int.hh, skipping
    unable to convert "\xED" from ASCII-8BIT to UTF-8 for ext/libgecode3/vendor/gecode-3.7.3/gecode/int/cumulative.hh, skipping
    unable to convert "\xE9" from ASCII-8BIT to UTF-8 for ext/libgecode3/vendor/gecode-3.7.3/gecode/int/distinct.hh, skipping
    unable to convert "\xF3" from ASCII-8BIT to UTF-8 for ext/libgecode3/vendor/gecode-3.7.3/gecode/int/gcc.hh, skipping
    unable to convert "\xE4" from ASCII-8BIT to UTF-8 for ext/libgecode3/vendor/gecode-3.7.3/gecode/int/sorted.hh, skipping
    unable to convert "\xED" from ASCII-8BIT to UTF-8 for ext/libgecode3/vendor/gecode-3.7.3/gecode/int/unary.hh, skipping
    unable to convert "\xED" from ASCII-8BIT to UTF-8 for lib/dep-selector-libgecode/vendored-gecode/include/gecode/int.hh, skipping
    unable to convert "\xED" from ASCII-8BIT to UTF-8 for lib/dep-selector-libgecode/vendored-gecode/include/gecode/int/cumulative.hh, skipping
    unable to convert "\xE9" from ASCII-8BIT to UTF-8 for lib/dep-selector-libgecode/vendored-gecode/include/gecode/int/distinct.hh, skipping
    unable to convert "\xF3" from ASCII-8BIT to UTF-8 for lib/dep-selector-libgecode/vendored-gecode/include/gecode/int/gcc.hh, skipping
    unable to convert "\xE4" from ASCII-8BIT to UTF-8 for lib/dep-selector-libgecode/vendored-gecode/include/gecode/int/sorted.hh, skipping
    unable to convert "\xED" from ASCII-8BIT to UTF-8 for lib/dep-selector-libgecode/vendored-gecode/include/gecode/int/unary.hh, skipping
    Installing ri documentation for dep-selector-libgecode-1.0.2
    Parsing documentation for dep_selector-1.0.3
    Installing ri documentation for dep_selector-1.0.3
    Parsing documentation for semverse-1.2.1
    Installing ri documentation for semverse-1.2.1
    Parsing documentation for solve-1.2.1
    Installing ri documentation for solve-1.2.1
    Parsing documentation for retryable-2.0.1
    Installing ri documentation for retryable-2.0.1
    Parsing documentation for net-http-persistent-2.9.4
    Installing ri documentation for net-http-persistent-2.9.4
    Parsing documentation for mixlib-log-1.6.0
    Installing ri documentation for mixlib-log-1.6.0
    Parsing documentation for mixlib-authentication-1.3.0
    Installing ri documentation for mixlib-authentication-1.3.0
    Parsing documentation for hashie-2.1.2
    Installing ri documentation for hashie-2.1.2
    Parsing documentation for buff-ruby_engine-0.1.0
    Installing ri documentation for buff-ruby_engine-0.1.0
    Parsing documentation for buff-shell_out-0.2.0
    Installing ri documentation for buff-shell_out-0.2.0
    Parsing documentation for buff-ignore-1.1.1
    Installing ri documentation for buff-ignore-1.1.1
    Parsing documentation for buff-extensions-1.0.0
    Installing ri documentation for buff-extensions-1.0.0
    Parsing documentation for varia_model-0.4.0
    Installing ri documentation for varia_model-0.4.0
    Parsing documentation for buff-config-1.0.1
    Installing ri documentation for buff-config-1.0.1
    Parsing documentation for ridley-4.1.2
    Installing ri documentation for ridley-4.1.2
    Parsing documentation for minitar-0.5.4
    Installing ri documentation for minitar-0.5.4
    Parsing documentation for cleanroom-1.0.0
    Installing ri documentation for cleanroom-1.0.0
    Parsing documentation for berkshelf-api-client-1.2.1
    Installing ri documentation for berkshelf-api-client-1.2.1
    Parsing documentation for berkshelf-3.2.3
    Installing ri documentation for berkshelf-3.2.3
    Done installing documentation for nio4r, celluloid-io, addressable, multipart-post, faraday, sawyer, octokit, dep-selector-libgecode, dep_selector, semverse, solve, retryable, net-http-persistent, mixlib-log, mixlib-authentication, hashie, buff-ruby_engine, buff-shell_out, buff-ignore, buff-extensions, varia_model, buff-config, ridley, minitar, cleanroom, berkshelf-api-client, berkshelf after 17 seconds
    27 gems installed

lets say we want to create a cookbook called example

Method 1)

 chef generate cookbook example

Method 2)

knife cookbook create example --cookbook-path .
cd example
kitchen init --create-gemfile
bundle install

This is the command:

ssh-keygen -lf /path/to/ssh/public_key

It is how to checkout git private repository from within a VM without leaving a key in the VM

First in host OS (Mac OSX in my case), run

ssd-add /path/to/githubkey

In the .ssh/config, add these lines:

    Host           github
    HostName       github.com
    IdentityFile   /path/to/githubkey

Then enable port forwarding in vagrant VM

Vagrant.configure("2") do |config|
  config.ssh.forward_agent = true

After you have run vagrant up, you can test the connection in the VM by running

ssh -T git@github.com

When I run

nosetests -v --failed

I keep getting this exception:

    #40 Failure: ImportError (No module named test_share_link2) ... ERROR

    ======================================================================
    ERROR: Failure: ImportError (No module named test_share_link2)
    ----------------------------------------------------------------------
    Traceback (most recent call last):
      File "/Users/antkong/dev/project/project-ve/lib/python2.7/site-packages/nose/loader.py", line 414, in loadTestsFromName
        addr.filename, addr.module)
      File "/Users/antkong/dev/project/project-ve/lib/python2.7/site-packages/nose/importer.py", line 47, in importFromPath
        return self.importFromDir(dir_path, fqname)
      File "/Users/antkong/dev/project/project-ve/lib/python2.7/site-packages/nose/importer.py", line 79, in importFromDir
        fh, filename, desc = find_module(part, path)
    ImportError: No module named test_share_link2

But I have already removed this test including both py and pyc files. Why nosetests keeps picking up this test?

It turns out I need to remove the .noseids file. It contains a stale reference to the removed file