Using Kali on a Raspberry 3b nano server (or higher, of course), part 1 – the beginning

First of all, Raspeberry 3b is an hard to find piece of hardware, bacame costly too of late.

Anyway, users experience is the same using a Raspberry 4.

To install the thing, read the fine manual or have a look to the many youtubers who explains the simple procedure.

When u have your ssd with Kali 4+ inside, then is time to use it.

First thing of all, Kali images arrives in this kind of situation:

df –block-size G
Filesystem 1G-blocks Used Available Use% Mounted on
/dev/root 10G 10G 0G 100% /
devtmpfs 1G 0G 1G 0% /dev
tmpfs 1G 0G 1G 0% /dev/shm
tmpfs 1G 1G 1G 1% /run
tmpfs 1G 1G 1G 1% /run/lock
/dev/mmcblk0p1 1G 1G 1G 59% /boot
tmpfs 1G 1G 1G 1% /run/user/133
tmpfs 1G 1G 1G 1% /run/user/1001

That’s wierd, because /etc /usr /home, etc are located in the “/” filesystem, mounted in a partition completely full. U can forget to easly upgrade, so U have to extend the partition, or create a new one and change default mount of the useful dirs.

I’ll try to extend the ‘/’ partition.

The data are going Cloud, R U ready?

Global financials change to react against war, a never ending pandemic, all is against your static vision of data collection.

Lack of materials has driven the hardware price to the top, so many company are thinking to migrate their DWH to the clouds. To realize this you car read this old but good 2020 assement:

Are you still thinking to maintain data ingestion and modelling without considering the various full cloud managed solutions?

Redshift select performance tuning: quick and dirty

Ok, it depends by your AWS cost attitude, but even in huge Redshift cluster you may experiment bad speed feelings in simply SQL interrogation. What are reactions? In order of deployment speed.

Are you using a jdbc/odbc  client sited outside VPC? Network is troubling you, install one inside VPC using EC2 if needed.

Are queries spending too much time in planning? Use views.

Check columns compression, is AUTO tuning on? If not AUTOs it.

Then there are a lot of thinking about sort keys, distribution keys and so on…so no more quick and dirty…

Nuff said: NFT are bad for climate

So Wired calls against NFT for their energy consuption. It appears to be a correct thought and sure it is when NFTs are used for pure speculative finantial purpuose.

NFT is a way to achieve information property in a secure way and this can be very useful to save values and assets.

Energy exhaustion problem still remains but, are the actual financial sevice less energy glotton?