Programmers Blog

I have Apache 2 configured with VirtualHost’s. So I have my domains for example http://mydomain1.com and http://sampledomain.com running on my machine. What about mails now? What about postfix?

For arriving mail:

1. Edit “/etc/postfix/main.cf” and add there:

         virtual_alias_domains = mydomain1.com, sampledomain.com
         virtual_alias_maps = hash:/etc/postfix/virtual
       

2. Edit or add “/etc/postfix/virtual”:

         @mydomain1.com user1
         homer@sampledomain.com user2
       

   This means that all mail for domain mydomain1.com should be delivered to local user account user1 (/home/user1 or whatever). This means also that mails for homer@sampledomain.com will be delivered to local user account user2.
3. Execute:

         cd /etc/postfix
         postmap virtual
         /etc/init.d/postfix restart
       

For departuring mail (mails sent form local accounts to the Internet):

1. Edit “/etc/postfix/main.cf” and add there:

    
         smtp_generic_maps = hash:/etc/postfix/generic
       

2. Edit or add “/etc/postfix/generic”:

         user1@ubuntu-1004-lucid-64-minimal user1@mydomain1.com
       

   So mails sent from local account user1 will be sent into the Internet as user1@mydomain1.com.
3. Execute:

         cd /etc/postfix
         postmap virtual
         /etc/init.d/postfix restart
       

Further information in here http://www.postfix.org/VIRTUAL_README.html#virtual_alias and in here http://www.postfix.org/ADDRESS_REWRITING_README.html#generic.

Problem:

When doing:

rake thinking_sphinx:index

you get:

undefined method `[]' for false:FalseClass

Solution: remove the empty config/schema.yml file.

Problem:

libxslt is missing.  try 'port install libxslt' or 'yum install libxslt-devel'
*** extconf.rb failed ***
Could not create Makefile due to some reason, probably lack of
necessary libraries and/or headers.  Check the mkmf.log file for more
details.  You may need configuration options.

Solution:

apt-get install libxslt1-dev

Problem: ubuntu 8.04

Unknown DAV provider: filesystem
   ...fail!

Solution:

a2enmod dav_fs

Problem:

This Vim was not compiled with the diff feature.

Solution:

apt-get install vim

Stange, but worked for me :)

I did not know that Pine is now called Alpine. So to have Pine in Ubuntu one should install

apt-get install alpine

The solution that worked for ubuntu works for xubuntu as well.

After reinstalling my Windows Vista I had to recover Grub menu. I tried https://help.ubuntu.com/community/RecoveringUbuntuAfterInstallingWindows and EasyBCD. It was not working. I downloaded Ubuntu 9.10 CD and boot it, hoping to do a grub-install. After reboot I got my Grub menu and when trying to boot Vista a “NTLDR is missing” error.

The solution that worked for me was to:

FIRST OF ALL:

Follow http://neosmart.net/wiki/display/EBCD/Recovering+the+Vista+Bootloader+from+the+DVD

SECOND OF ALL:

Follow https://wiki.ubuntu.com/Grub2#Recover%20Grub%202%20via%20LiveCD

And watch out for the menu.lst generated (/boot/grub/menu.lst), mine included thinks like:

title Ubuntu 9.10, kernel 2.6.31-14-generic
root 
kernel /boot/vmlinuz-2.6.3........
initrd /boot/initrd.img-2.6.3........
quiet

But it should be:

title Ubuntu 9.10, kernel 2.6.31-14-generic
root (hd0,4)
kernel /boot/vmlinuz-2.6.3.......
initrd /boot/initrd.img-2.6.3.....
quiet

It seams that update-grub when doing a chroot generated wrong partition numbers for grub. To be more specific it did not generate any partition pointers for the loader :) But after changing those everything works fine.

(hd0,4) is a grub partition number. if you don’t know how to find out what to type there study grub manual http://www.gnu.org/software/grub/manual/html_node/Naming-convention.html

Mine is:

hd - hard disk

0 - disk no. 1

4 - first extended partition

This was inspired by: ruby-on-rails-development-on-ubuntu-9-04-jaunty-using-ruby-1-8-6 . That unfortunately did not work for me.

Edit the file:

/etc/apt/preferences

Add to it:

Package: ruby
Pin: release a=hardy
Pin-Priority: 900

Package: ruby1.8
Pin: release a=hardy
Pin-Priority: 900

Package: libruby1.8
Pin: release a=hardy
Pin-Priority: 900

Package: rdoc1.8
Pin: release a=hardy
Pin-Priority: 900

Package: ri1.8
Pin: release a=hardy
Pin-Priority: 900

Package: libgtk2-ruby1.8
Pin: release a=hardy
Pin-Priority: 900

Package: libdbd-sqlite3-ruby1.8
Pin: release a=hardy
Pin-Priority: 900

Package: libopenssl-ruby1.8
Pin: release a=hardy
Pin-Priority: 900

Package: libsqlite3-ruby1.8
Pin: release a=hardy
Pin-Priority: 900

Package: ruby1.8-dev
Pin: release a=hardy
Pin-Priority: 1001

Package: libdbi-ruby1.8
Pin: release a=hardy
Pin-Priority: 900

Package: libatk1-ruby1.8
Pin: release a=hardy
Pin-Priority: 900

Package: libpango1-ruby1.8
Pin: release a=hardy
Pin-Priority: 900

Package: libatk1-ruby1.8
Pin: release a=hardy
Pin-Priority: 900

Package: libgdk-pixbuf2-ruby1.8
Pin: release a=hardy
Pin-Priority: 900

Package: libglib2-ruby1.8
Pin: release a=hardy
Pin-Priority: 900

Package: libcairo-ruby1.8
Pin: release a=hardy
Pin-Priority: 900

Package: irb1.8
Pin: release a=hardy
Pin-Priority: 900

Package: libreadline-ruby1.8
Pin: release a=hardy
Pin-Priority: 900

Package: rails
Pin: release a=hardy
Pin-Priority: 900

Package: libncurses-ruby1.8
Pin: release a=hardy
Pin-Priority: 900

Edit the file:

/etc/apt/sources.list

Add to it:

deb http://gb.archive.ubuntu.com/ubuntu/ hardy restricted main multiverse universe  
deb-src http://gb.archive.ubuntu.com/ubuntu/ hardy restricted main multiverse universe  

Install ruby

apt-get update
aptitude install  ruby rdoc irb libyaml-ruby libzlib-ruby ri libopenssl-ruby ruby1.8-dev

Problem:

Can't install RMagick 2.9.1. Can't find MagickCore.h.

Solution:

apt-get install libmagick++9-dev