1. You have to install qemu. http://free.oszoo.org/ftp/qemu/win32/release/QemuInstall-0.7.2.exe 2. cd c:\Program files\qemu qemu-img.exe convert -O vmdk hdd.vdi hdd.vmdk
I have also written another post which is based on the latest Oracle VirtualBox to .vmdk explaining how to easily convert vdi to vmdk.
Read also this article, it is easier: easily convert vdi to vmdk
useful words: vdi to vmdk, convert vdi to vmdk, convertir vdi cdk
Posted in Knowledge Base.
– April 3, 2009
Most wanted question:
1. How do I access PostgreSQL through the network?
1.1. Open postgresql.conf (in Ubuntu 8.04 at /etc/postgresql/8.3/main/postgresql.conf) and change listen_addresses = ‘localhost’ to listen_addresses = ‘*’.
1.2. Uncomment password_encryption = on.
1.3. Open /etc/postgresql/8.3/main/pg_hba.conf
host all all / trust
eg. host all all 192.168.2.0/24 trust
1.4. Restart PostgreSQL
/etc/init.d/postgresql-8.3
Yes! That works fine!
Posted in Knowledge Base.
– April 3, 2009
From linux command prompt:
su - postgres
psql -d template1 -U postgres
alter user postgres with password 'postgres_password';
ctrl+d
Posted in Knowledge Base.
– April 3, 2009
Oops.
All it needed was
/etc/nagios2#/etc/init.d/nagios2 stop
Stopping nagios2 monitoring daemon: nagios2.
/etc/nagios2# dpkg-statoverride –update –add nagios www-data 2710 /var/lib/nagios2/rw
/etc/nagios2# dpkg-statoverride –update –add nagios nagios 751 /var/lib/nagios2
/etc/nagios2# /etc/init.d/nagios2 start
Starting nagios2 monitoring daemon: nagios2.
ref. http://ubuntuforums.org/showthread.php?t=458375
Posted in Knowledge Base.
– April 3, 2009
Table 2. Plugin Return Codes
| Numeric Value | Service Status | Status Description |
|---|---|---|
| 0 | OK | The plugin was able to check the service and it appeared to be functioning properly |
| 1 | Warning | The plugin was able to check the service, but it appeared to be above some “warning” threshold or did not appear to be working properly |
| 2 | Critical | The plugin detected that either the service was not running or it was above some “critical” threshold |
| 3 | Unknown | Invalid command line arguments were supplied to the plugin or low-level failures internal to the plugin (such as unable to fork, or open a tcp socket) that prevent it from performing the specified operation. Higher-level errors (such as name resolution errors, socket timeouts, etc) are outside of the control of plugins and should generally NOT be reported as UNKNOWN states. |
link: http://nagiosplug.sourceforge.net/developer-guidelines.html#AEN35
Posted in Knowledge Base.
– April 3, 2009
stop nagios2
/etc/nagios2# dpkg-statoverride –update –add nagios www-data 2710 /var/lib/nagios2/rw
/etc/nagios2# dpkg-statoverride –update –add nagios nagios 751 /var/lib/nagios2
start nagios2
Good stuff!
Leonardo
Posted in Knowledge Base.
– April 3, 2009
root@srv:~# mysql -p
Enter password:
Welcome to the MySQL monitor. Commands end with ; or \g.
Your MySQL connection id is 14 to server version: 5.0.24a-Debian_9ubuntu2.4-log
Type ‘help;’ or ‘\h’ for help. Type ‘\c’ to clear the buffer.
mysql> GRANT ALL ON *.* TO root@’%’ IDENTIFIED BY ‘password_you_want’;
Query OK, 0 rows affected (0.00 sec)
mysql>
Posted in Knowledge Base.
– April 3, 2009
Today I had an interesting issue on Ubuntu 8.10.
We have 2 NICS on the server one has the following ip 172.16.20.10/16 and another one has 172.16.60.10/16. I know they are on the same network though but we had to do it in order to accomplish some routing issues.
So here is the problem:
When I try to ping our ISPs Gateway it succesful pings till the eighth or ninth reply and stops replying.
On ubuntu 6.10 it works fine.
So here is the solution:
Since we have 2 NICs with the same network address when the second one tries to reach a remote server the Kernel thinks it is a spoofing attack since by default it is enable source address verification against spoofing attacks.
So what you have to do is to change the rp_filter kernel parameter to 0 (zero).
1. Edit 10-network-security.conf
vi /etc/sysctl.d/10-network-security.conf
change to 0 (zero)
2. invoke-rc.d procps start
This is it!
Leonardo
Posted in Knowledge Base.
– April 3, 2009
setup
1. sudo apt-get install apache2
2. sudo apt-get install openssl
3. sudo apt-get install ssl-cert
create ssl certificate:
sudo make-ssl-cert /usr/share/ssl-cert/ssleay.cnf /etc/ssl/private/localhost.pem
switch to apache sites configuration:
cd /etc/apache2/sites-available/
bakup the default configuration:
sudo cp default default.backup.date
be sure to listen the port 80 for the default:
sudo sed -i ’1,2s/\*/*:80/’ default
create the ssl configuration:
sudo cp default ssl
set the ssl port:
sudo sed -i ’1,2s/\*:80/*:443/’ ssl
sudo sed -i “3a\\\tSSLEngine On\n\tSSLCertificateFile /etc/ssl/private/localhost.pem” ssl
enable ssl:
sudo a2ensite ssl
sudo a2enmod ssl
restart apache2:
sudo /etc/init.d/apache2 restart
Posted in Knowledge Base.
– April 3, 2009
