Edit postgresql.conf file and enable the following options:

• log_destination = ’stderr’
• redirect_stderr = on
• log_directory = ‘pg_log’
• log_filename = ‘postgresql-%Y-%m-%d.log’
• client_min_messages = notice
• log_min_messages = notice
• log_min_duration_statement = 0
• log_line_prefix = ‘[%t] <%d>’

The comments in that file are quite sufficient to understand and change values according to your need. Once you’re done, don’t forget to restart PostgreSQL.

After that just tail -f postgresql-2009-07-20.log and maybe throw some grep and/or grep -v

I’ve read this article (http://www.depesz.com/index.php/2008/03/30/keyboard-shortcuts-in-psql) today and decided to try on my MacBook.

Interestingly, all shortcuts were working fine in normal shell, but no action as soon as run “psql db_name” and go into interactive psql prompt.

After searching google, found out that psql on Mac OS was using libedit instead of “readline”, so had to edit $HOME/.editrc file as below:

postgres@deimos:~ $ vim $HOME/.editrc
bind -s “^[e" "explain analyze "
bind -s "^[s" "select * from "

To have the special characters "ctrl-v" and "option-e" insterted while in vim, I had to tick/enable "Terminal.app --> Preferences --> [*] Use option as meta key”

After some google’ing around, I’ve found out that it is possible to create an account without providing credit card details:

1. Find a free application first.
2. Click on “GET APP” link (if the application is not free it will be “BUY APP”).
3. You’ll be prompted to login or create an account.
4. Now, it will provide another option “(o) NONE” in credit card details section, which you can choose and complete the registration process.

Go get them!

You can change that with below snippet of code in your .bashrc

PS1=’\[\033[01;32m\]\u\[\033[01;34m\] @ \[\033[01;31m\]\h \[\033[00;34m\][ \[\033[01;34m\]\W \[\033[00;34m\]]\[\033[01;32m\] \[\033[00m\]‘

If you want to test above prompt without doing any changes to your current/default prompt, you can just copy/paste below in your prompt and press [Enter]:

export PS1=’\[\033[01;32m\]\u\[\033[01;34m\] @ \[\033[01;31m\]\h \[\033[00;34m\][ \[\033[01;34m\]\W \[\033[00;34m\]]\[\033[01;32m\] \[\033[00m\]‘

Update: Forgot to link the source that I’ve used http://twistedcode.blogspot.com/search/label/howtos

Now, let’s assume that I would like to host these files off my Ubuntu guest OS… What do I do?
1. Add the folder in “Shared Folders” screen as seen on the screenshot.
2. Boot the guest OS up and run this command:

root@virtuozo~$ mount -t vboxsf -o uid=1000,gid=33 blog /var/www/blog/

As you can see, I used exactly the same name that’s set in the

screenshot above. What’s next? Just restart apache and point your browser to the right IP/hostname. In the example above, uid=1000 is normal user, whereas gid=33 is the www-data user (apache).
PS: You might need to do some port forwarding, so that when you point your browser to http://localhost:8000 it will be forwarded to localhost:80 on your guest OS.

• I am able to run Linux & XP Pro guests.
• Seamless mode is working fine after installing “Guest Additions”
• Shared folder is working fine, the “/var/www/my_site” is mounted from Mac_OS_X->Projects/workspace/my_site, basically my development environment is Mac, whereas the LAMP stack (apache2 + postgresql) runs on Linux guest.
• Port forwarding – no problems.

VBoxManage setextradata “ubuntu-lts” “VBoxInternal/Devices/pcnet/0/LUN#0/Config/guestweb/Protocol” TCP
VBoxManage setextradata “ubuntu-lts” “VBoxInternal/Devices/pcnet/0/LUN#0/Config/guestweb/GuestPort” 80
VBoxManage setextradata “ubuntu-lts” “VBoxInternal/Devices/pcnet/0/LUN#0/Config/guestweb/HostPort” 8000

VBoxManage setextradata “ubuntu-lts” “VBoxInternal/Devices/pcnet/0/LUN#0/Config/guestssl/Protocol” TCP

VBoxManage setextradata “ubuntu-lts” “VBoxInternal/Devices/pcnet/0/LUN#0/Config/guestssl/GuestPort” 443
VBoxManage setextradata “ubuntu-lts” “VBoxInternal/Devices/pcnet/0/LUN#0/Config/guestssl/HostPort” 8443

VBoxManage setextradata “ubuntu-lts” “VBoxInternal/Devices/pcnet/0/LUN#0/Config/guestssh/Protocol” TCP

VBoxManage setextradata “ubuntu-lts” “VBoxInternal/Devices/pcnet/0/LUN#0/Config/guestssh/GuestPort” 22
VBoxManage setextradata “ubuntu-lts” “VBoxInternal/Devices/pcnet/0/LUN#0/Config/guestssh/HostPort” 2200

VBoxManage setextradata “xp_pro” “VBoxInternal/Devices/pcnet/0/LUN#0/Config/guestremote/Protocol” TCP

VBoxManage setextradata “xp_pro” “VBoxInternal/Devices/pcnet/0/LUN#0/Config/guestremote/GuestPort” 3389
VBoxManage setextradata “xp_pro” “VBoxInternal/Devices/pcnet/0/LUN#0/Config/guestremote/HostPort” 3388

Now, let’s say you want to remove any of the above port forwardings (I’ll do for SSL port forwarding in my case):

VBoxManage setextradata “ubuntu-lts” “VBoxInternal/Devices/pcnet/0/LUN#0/Config/guestssl/Protocol”

VBoxManage setextradata “ubuntu-lts” “VBoxInternal/Devices/pcnet/0/LUN#0/Config/guestssl/GuestPort”

VBoxManage setextradata “ubuntu-lts” “VBoxInternal/Devices/pcnet/0/LUN#0/Config/guestssl/HostPort”

Basically, you just remove the last string from the same set of commands.

• Get a password file (file that will contain possible passwords one per line)
• Write a bash script, total 8 lines of code
• Run the script and wait… (depends on processing power, password file size, etc)

synack@deimos $ cat crack.sh
#!/bin/bash
# Author: K. Jusupov
# Date: 09/11/2007
# Description: Brute force the password protected zip file using 'password' from a file

while read line; do
unzip -P $line $1;
if [ $? = 0 ]; then
# successful unzip
clear
echo "Password found: $line"
break
fi
done < passwd.txt

Next day onwards I’ve read different post talking about the experience the users were having installing, configuring, customizing or upgrading, etc… There were people who had that experience in a bit salty way…

So, today I eventually got my copy of Leopard and after getting all my backups done, started upgrade… To be on the safe side, I did verify and repair my hard disk, just in case my upgrade will fail. It took about 1.5 – 2 hours to finish the upgrade and get my very first experience with Leopard

I got my mail (about 500mb) without any issues, all my pictures (about 20gb) without any problems. I think all my apps are OK, working fine… I don’t think I will be able to do any benchmarks on the performance, speed, etc… As never had problems running on my 2gb RAM and 2.16 Ghz Core 2 Duo MacBook. So, overall I can say – my upgrade went very smooth, no issues. Right after the upgrade finished, was able to get on-line (wi-fi) and get some software updates.

Hopefully next few posts will be able new features, new apps, etc…

postgres@server:~$ psql testdb  -c “select relname, idx_tup_fetch as seeks, n_tup_ins + n_tup_upd + n_tup_del as writes from pg_stat_user_tables order by writes desc limit 5;”
relname        |  seeks   | writes
——————+———+——–
user                    |  364963 | 355314
employee          |     232     | 282747
class                   |  587978 | 190938
task                    |      79      | 125255
project               |                | 117282
(5 rows)

Based on these kind of output you might want to reconsider some… Maybe reconsider how your database is setup? Put most active tables as a separate database? Move them to a separate discs? etc…

tempdb=# SELECT pg_database.datname,
pg_size_pretty(pg_database_size(pg_database.datname)) AS size
FROM pg_database;

And this is what it shows:

     datname      |  size
——————+———
postgres         | 3480 kB
jasperserver  | 82 MB
testdb             | 3480 kB
template1      | 3537 kB
template0     | 3480 kB
tempdb          | 127 MB
(6 rows)

Time: 143.405 ms