Next Page »
  -  
May
20
2014
Mechanical computers
Posted by ebal at 08:35:10 in blog, planet_Sysadmin

I am currently pseudoparallel reading (i am currently reading one other book) The Pattern On The Stone By Daniel Hillis and i am really really impressed about the simple explanation on logical gates (boolean algebra).

Hillis is using as an example The Tinkertoy computer - the mechanical computer for playing TicTacToe !
Look at this page to take a quick look: The Tinkertoy computer

BTW The first mechanical computer is the The Antikythera mechanism 100BC to predict astronomical positions and eclipses.

Truly Amazing !

Tag(s): books
May
19
2014
apache Deflate
Posted by ebal at 12:39:30 in blog, planet_Sysadmin

It took me a few minutes to understand why one of my online sign files isnt the correct one.

The actual file:


[~]>  md5sum file.sign
89dd90709bbc51eb6796280123f46fe6

The file on my web server: 


$  md5sum file.sign
89dd90709bbc51eb6796280123f46fe6

when download it :


[~]>  md5sum file.sign
f57846a7032a1d106799af38ab94cfb7

Say what ?

Whattttttt !


[~]> file file.sign
file.sign: gzip compressed data, from Unix

so what if i did:


gunzip -d -c file.sign | md5sum 
89dd90709bbc51eb6796280123f46fe6  -

So a light bulb lighted up upon my hackergotchi !! mod_deflate

i need to change my filters

Tag(s): deflate, apache
May
18
2014
fluxbox simple tiling function
Posted by ebal at 22:21:52 in blog, planet_ellak, planet_Sysadmin

reading

man 5 fluxbox-keys

i found that there is

ArrangeWindows pattern / ArrangeWindowsVertical pattern / ArrangeWindowsHorizontal pattern

so i edited my 


~/.fluxbox/keys

to auto-tile (vertical/horintal) with my super (window) key as shortcut

Mod4 h :arrangewindowshorizontal
Mod4 v :arrangewindowsvertical

Tag(s): fluxbox
May
16
2014
book status
Posted by ebal at 22:38:55 in books

unfortunately i have not track my book status :(

I have assembled some, so here they are:

Currently reading multiple books:

Finished !

Tag(s): books
May
16
2014
postfix body and header checks
Posted by ebal at 09:25:58 in blog, planet_Sysadmin

Postfix has the ability to DISCARD (or Reject) any email, by using simple regular expressions. This can be done on your incoming or outgoing mail farm and you can either check the header or body of an email.

For me header_checks is a more powerful tool but the main problem with phishing bots is that the headers arent always the same (different IPs, different Froms etc etc).

And on half of them scam situations there is an ugly url or email inside the body of the email.

Our abuse department informed us today for a scam bot that “WANTS YOU TO REPLY TO THEM WITH YOUR PASSWORDS” and we took the appropriate measures against it. None of our outgoing mail servers can be used to send a reply to the abuser mail address.

There is a deb...

To see the entire article, click uppon article's title/link.
Thank you.
May
13
2014
paranoid
Posted by ebal at 13:06:17 in blog

This blog post in only in Greek.

Η εταιρεία στην οποία εργάζομαι την τρέχουσα στιγμή,
έχει έναν “υποχρεωτικό” κανόνα ό,τι όλοι οι υπάλληλοι
πρέπει για δεκαπέντε λεπτά να διακόπτουν την εργασία τους
εντός ημέρας.

Παρόλο την υποχρεωτική αυτή διάταξη, πρέπει παράλληλα να υπογράφεις
ως υπάλληλος καθημερινά σε χαρτί ότι όντως πραγματοποίησες αυτό το διάλλειμα.

Το χαρτί αυτό αρκεί να είναι ανά μήνα.

Άρα υποχρεωτικά πρέπει να υπογράφεις ότι υποχρεωτικά κάνεις ένα 15 διάλλειμα.

ΣΕ ΧΑΡΤΙ ! άρα πρέπει να υπογράφεις κάθε μέρα σε χαρτί και να το παραδίδεις κάθε μήνα στην γραμματεία.

 

Έχω να υπογράψω κοντά έξι μήνες.
Ως εκ τούτου έχει γίνει θέμα εντός της διεύθυνσής μου.

Με ρώτησαν:

  • Γιατί δεν μας τα έχεις φέρει ?
  • Δεν έχω πραγματοποιήσει 15λεπτο διάλλειμα.
  • ΜΑ είναι υποχρεωτικο να κάνεις.
  • Αφού είναι υποχρεωτικό και δεν μπορώ να το αρνηθώ, τότε γιατί πρέπει να υπογράψω ...
    To see the entire article, click uppon article's title/link.
    Thank you.
  -