Febbraio 2010

initrd modules options

man modprobe.conf options modulename option… This command allows you to add options to the module modulename (which might be an alias) every time it is inserted into  the  kernel:  whether directly (using modprobe modulename, or because the module being inserted depends on this module. vi /etc/modprobe.d/options options sundance media=”10mbps_fd,autosense,autosense,10mbps_fd,autosense,autosense,autosense,autosense” update-initramfs -uv

15/02/2010   kernel

ssh client putty multi tab

PuTTY Connection Manager is a free PuTTY Client Add-on for Windows platforms which goal is to provide a solution for managing multiple PuTTY instances http://puttycm.free.fr/download/puttycm.exe

09/02/2010   Windows

win auto install skype openoffice firefox vlc

http://ninite.com/ Ninite installs software fast with default settings and says “no” to browser toolbars and other junk. Ninite checks your PC’s language and 64-bit support to install the latest, best version of each program.

09/02/2010   Windows

script auto connect multi ssh-server konsole

#!/bin/bash ## ## arr dei server formato ‘utente@host |nome_simbolico’ ## SERVER=(‘[email protected] |SERVERA’ ‘[email protected] | SERVERB’ ‘[email protected] -p4390 |SERVERC’ ‘[email protected] -p2100 | SERVERD’) # start a new konsole window and save the handle in $konsole konsole=$(dcopstart konsole-script) # maximize the new window dcop $konsole konsole-mainwindow#1 maximize # get current session for the first (just created) window […]

09/02/2010   Bash

Line Attenuation

Line Attenuation In gerneral, attenuation is the loss of signal over distance. Unfortunately, dB loss is not just dependent on distance. It also depends on cable type and gauge (which can differ over the length of the cable), the number and location other connection points on the cable. •20bB. and below = Outstanding •20dB-30dB. = Excellent •30dB-40dB. = Very Good •40dB-50dB. = Good •50dB-60dB. = Poor and may experience connectivity issues •60dB. and above = Bad and will experience connectivity issues Line attenuation also affects your speed. •75 dB+: Out of range for broadband •60-75 dB: max speed up to 512kbps •43-60dB: max speed up to 1Mbps •0-42dB: speed up to 2Mbps+

09/02/2010   Internet

SNR means Signal to Noise Ratio

SNR means Signal to Noise Ratio. Simply put divide the Signal value by Noise Value and you get SNR. You need high SNR for a stable connection. In general, a higher signal to noise ratio will result in less errors. •6bB. or below = Bad and will experience no line synchronisation and frequent disconnections •7dB-10dB. = Fair but does not leave much room for variances in conditions. •11dB-20dB. = Good with little or no disconnection problems •20dB-28dB. = Excellent •29dB. or above = Outstanding

09/02/2010   Internet

bash find email year based

for i in `find . -type f -iname ‘*[0-9]*’` ; do  head -n $(grep -m1 -n ^$ $i | awk -F : ‘{print $1}’) $i | grep “^Date.*\ 2005\ ” -q  ; if [ $? != 1 ]; then echo $PWD $i; fi ; done

09/02/2010   Bash