Using the system clipboard with tmux on OS X is broken. I really like tmux but having copy and paste is kind of important for me. Here is my attempt to get it back with a simple bash script until I find something better. The approach is to take a named pipe and feed it the contents of “tmux showb”. A bash script will manage the pipe and because this script is initialized from a normal session it will write to the system clipboard just fine.

In my .bash_profile…

pipe4tmux=/tmp/pipe4tmux
alias tcp="tmux showb > $pipe4tmux"
if [[ ! -p $pipe4tmux ]]; then
~/pipe4tmux.sh &
fi

And in pipe4tmux.sh…

#!/bin/bash
pipe4tmux=/tmp/pipe4tmux
echo "Starting named pipe $pipe4tmux"
trap "rm -f $pipe4tmux" EXIT

if [[ ! -p $pipe4tmux ]]; then
  mkfifo $pipe4tmux
fi

while true
do
  pbcopy < $pipe4tmux
done

echo "Quitting pipe4tmux $pip4tmux"

Remember to include the host declaration in the database.yml file when you deploy to Dreamhost. Dreamhost does not use “localhost” which is typically the default setting when using the mysql adapter and developing locally or even on a small site.

At least for me, when I ported a Rails app to Dreamhost, this was the only “Gotcha”, because my log files were not reporting any errors and were instead serving the 500 something went wrong file.
A sample config/database.yml file

production:
  adapter: mysql
  username: youruser
  password: yourpasswd
  database: ror_production_db
  host: mysql.yourdomain.com

To port, I unpack my gems, if I haven’t already

rake gems:unpack

Then I freeze and package rails w/ my app just in case versions aren’t exact

rake rails:freeze:gems

Then I upload to Dreamhost!

I normally install postfix for my MTA. However, I’ve never really used sendmail so I’d decide to give it a whirl for a new application I’m working on. I don’t use it for anything but handling the mail that the application needs to send out, like new user welcome emails, password resets, etc.

apt-get install sendmail

Sendmail, unlike postfix, won’t work out of the box. Postfix will prompt you for the necessary config setup when running the install. Sendmail won’t, and therefore it’s not ‘out of the box’. You’ll have to make some modifications on your own. Nothing major but this is what I’ve found in order to get it to work, reliably and quickly. The first thing I did was add the fully qualified domain name to my /etc/hosts file

#vim /etc/hosts
127.0.0.1 www.mydomain.com

After this I added the fully qualified domain name to my apache default configuration file

#/etc/apache2/sites-available/default
ServerName www.mydomain.com
#vhost info etc...

Reload and restart…

/etc/init.d/apache2 force-reload
/etc/init.d/sendmail restart

You can test sendmail like so

sendmail email@example.com
hello
from
me
.

This should deliver a message to you (the “.” on a new line, followed by a new line, closes the message).

If you run into problems using ActionMailer > 2.2, Postfix and OpenSSL while sending mail from your application, try changing the following:

  vim /etc/postfix/main.cf

Change

 smtpd_use_tls=yes

to

smtpd_use_tls=no

OpenSSL support with Postfix does not work out of the box. You can either generate valid certificates or tell Postfix not to use the certificates. More information is available in this discussion forum.

http://forum.slicehost.com/comments.php?DiscussionID=2656

Sample Ruby on Rails database config file for connecting to mysql.

production:
  adapter: mysql
  encoding: utf8
  reconnect: false
  database: db_production
  pool: 5
  username: db_user
  password: db_password
  #socket: /tmp/mysql.sock #this may vary