« Archives in May, 2009

Serial Datalogger Service

I've wrote this very very simple tool to log CIL data from our PABX;

you can use it as you want, because it read data from the serial port an write it to a text file in c:\program files\sdl\data

It run as a windows service, so you don't have to login to the pc to start it.


Microsoft net framework 3.5


Backup virtual machines with Vmware consolidated Backup

To backup entire virtual machine while are running, you have to use the VBC provided by vmware.
this is a commandline tool that speaks with your VirtualCenter and tell it to create a Snapshot of a virtual machine, then detach it and copy the vmdk files to a location.

Take a look here http://www.vmware.com/products/vi/consolidated_backup.html to understand how it work.

the sintax of the command is like this:

vcbmounter.exe -m nbd -h yourvitualcenter.yourdomain -u username -p password -a name:VMname -t fullvm -r pathwheretosave

With "-m nbd" you can backup your Vm through an ethernet instead of a FibreChannel SAN connection.

Batching an ftp session under linux

A very useful script to transfer a file in FTP without interaction.
You can schedule in crontab to trasfer everything you want to a server. simply adjust parameter and voilà...
To GET a file instead of PUT simply change the line

  2. put $FILE


  2. get $FILE

This is the code..

  2. #!/bin/sh
  3. HOST=your.ftp.server
  4. USER=username
  5. PASS=password
  6. FILE=file.to.transfer
  7. ftp -n<<eof
  8. open $HOST
  9. quote user $USER
  10. quote pass $PASS
  11. put $FILE
  12. bye
  13. EOF

Phisical 2 Virtual of RedHat 9.0 kernel 2.4 smp

I've made this on a RedHat 8.0 machine... maybe you can find this useful.

This phisical machine is an IBM X series 235 with a RAID 5 server raid controller running  RedHat linux 8.0 kernel 2.4.20-8smp.

I've used the Vmware converter standalone on  my Debian Squeeze laptop to "hot import" this machine.

Unfortunately this tool can't syncrhonize data between phisical and new virtual machine, so before start the migration I had to stop Lotus Domino server to have all databases updated on the virtual machine.

The migration was completed succesfully, and I've powered on my virtual machine but the first problem is here:

A terrible message appear instead of Grub boot menu:

"Cannot load Operating System"

Thinking about.....

Ok, grub is not installed in the MBR; so I've attached a RedHat enterprise linux iso to the VM cdrom,  rebooted into a linux rescue mode; chrooted to the installation and installed grub with:

me@linuxbox#grub-install /dev/sda

then I ran kudzu daemon to remove all old devices configuration (2 broadcom network adapter) and to add new (buslogic SCSI adapter).

Next I've to change hostname and IP address; and install Vmware tools;
don't forget or skip this step, or you'll have a 10 Mbps Nic and you can receive this message in console:

eth0: RUNT packet!