Zyrianes / Unix

Home + Sharp + return

ludovic Bellier — 2008-03-22T14:19:02Z

The shortcut that I never remember:
Esc + # (Meta + #)
With Bash, comment the line and go to next line

Very Simple Test Download via a Proxy Howto

ludovic Bellier — 2007-11-18T22:00:13Z

This simple howto explains howto to check your download rate through a ft proxy

private Proxy
=============

If it's a private proxy, first create a tunnel to this proxy with ::

ssh -l -L 3128:localhost:3128

Next, configure your proxy::

export ftp_proxy=localhost:3128

Finally, test your dl with wget::

wget --verbose --proxy=on \\
ftp://ftp.free.fr/mirrors/ftp.ubuntu.com/releases/7.10/ubuntu-7.10-desktop-i386.iso

You can check if your traffic uses the proxy with iftop, example::

iftop -i eth0

public or internal Proxy
========================

You just set your proxy host/port and launch wget::

export ftp_proxy=localhost:3128
wget --verbose --proxy=on \\
ftp://ftp.free.fr/mirrors/ftp.ubuntu.com/releases/7.10/ubuntu-7.10-desktop-i386.iso

TightVNC and VNC_VIA_CMD

ludovic Bellier — 2005-05-16T21:41:19Z

TightVNC has a '-via' option that allows using a gateway through the client and the VNC server.

TightVNC with this option can use a 'host in the middle' (gateway) to access another host. The VNC_VIA_CMD defines the ssh options to access the gateway.

Example:

host A access host C through host B. A and B have a public IP, but C is behind B. 
A can access B with ssh.
export VNC_VIA_CMD='/usr/bin/ssh -2 -x -p <B sshd port> -l <B user> -f -L %L:%H:%R %G sleep 20'
vncviewer -via  <B host ip> <C host IP from B>

true life example:

foo --> gateway.bar.com --> 192.168.1.36
foo> export VNC_VIA_CMD='/usr/bin/ssh -2 -x -p 55 -l foo -f -L %L:%H:%R %G sleep 20'
foo> vncviewer -via  gateway.bar.com 192.168.1.36

links :

http://www.vanemery.com/Linux/VNC/vnc-over-ssh.html

charcode test: