• SCSI over FCP for Linux on System z – Introduction and New Features (SHARE 111, San Jose, California, August 2008)
• Additional Feet for the Penguin – SCSI over FCP, Multipathing for Linux on System z (SHARE 111, San Jose, California, August 2008)
• Introduction to SCSI over FCP for Linux on System z (Webcast, October 2010)

The team authoring the Performance Measurement and Tuning Redbook kindly thanked me for contributing. While working in this position, i also co-authored the article IBM zEnterprise storage I/O advancements in the IBM Journal of Research and Development.

Since i am no longer working in that position, please not that this information might be outdated. Please see the official web page for the latest information and contact information.

$ script test.log
Script started, file is test.log
$ mkdir x
$ ls x/
$ exit
exit
Script done, file is test.log
$ cat test.log 
Script started on Wed 03 Aug 2011 02:33:36 PM MST
$ mkdir x
$ ls x/
$ exit
exit

Script done on Wed 03 Aug 2011 02:33:41 PM MST

set query_command = "mutt-google-contacts '%s'"

Here is the script:

#!/usr/bin/python

# Version 0.1 Copyright (C) 2011 Christof Schmitt
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful, but
# WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
# General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program. If not, see http://www.gnu.org/licenses/.

# This script parses the output of 'google contacts list'
# (http://code.google.com/p/googlecl/wiki/ExampleScripts#list) and
# prints the queried email address in the format required by mutt
# (http://www.mutt.org/doc/manual/manual-4.html#ss4.5).
#
# Usage: Install googlecl from
# http://code.google.com/p/googlecl/downloads/list and add
# set query_command = "mutt-google-contacts '%s'"
# to ~/.muttrc

import subprocess
import string
import sys

if not len(sys.argv) >= 2:
    print 'Usage: %s querystring' % sys.argv[0]
    sys.exit(1)

sys.stdout.write('Calling "google contacts list": ')

query = ' '.join(sys.argv[1:])
args = ['/usr/bin/google', 'contacts', 'list', '--title', '(?i).*' + query,
        '--fields', 'name,email', '--delimiter=;']

google = subprocess.Popen(args, stdout=subprocess.PIPE)
stdout, stderr = google.communicate()

if google.returncode != 0:
    print 'error'
    sys.exit(2)

print 'success'

for line in stdout.split('\n'):
    if len(line) > 0:
        name, emails = line.split(';')
        for email in emails.split(', '):
            if string.find(email, ' ') != -1:
                # with two or more addresses there is an additional
                # type (home, work, ...)
                typeoraddr, emailaddr = string.split(email, ' ')
                print emailaddr + '\t' + name + '\t' + typeoraddr
            else:
                # with only one address, there is no type field
                print email + '\t' + name

sudo apt-get install linux-backports-modules-wireless-lucid-generic

or when the PAE kernel is being used:

sudo apt-get install linux-backports-modules-wireless-lucid-generic-pae

Connectivity is much better for me with the updated driver.

• Always add use strict and use warnings.
• use autodie allows omitting the or die statements for catching errors.
• given/when is analogous to switch/case in other languages.
• say prints a line while automatically adding the newline.
• Try::Tiny is a CPAN module for try/catch style exception handling.
• carp and croak should be used to report errors in modules. It is more useful to see where wrong data was passed to the module function, than the exact place where the module called die.
• App::perlbrew allows installing perl in the home directory.
• local::lib helps installing perl modules in local directories.
• Test::More is a module for running tests.
• Devel::Cover can be used to measure the code coverage.
• Perltidy reformats perl code to make it easier to read.
• List::Util has some helper functions for lists (e.g. max, min, sum)
• Named captures in regular expressions allow using named variables instead of $1, $2, … to extract parts of the original string.

This list is incomplete, and i would highly recommend watching the talk to see everything mentioned there.

• Please
• Do
• Not
• Throw
• Salami
• Pizza
• Away.

The first letters map to the names of the different OSI layers:

• Physical Layer
• Data Link Layer
• Network Layer
• Transport Layer
• Session Layer
• Presentation Layer
• Application Layer

This works at least for computer people enjoying salami pizza. As a sidenote, Layer 8 is not part of the standard OSI model, although it can be important for troubleshooting problems in the real world.