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Here is my (x)ubuntu version:
root@ubuntu:~# lsb_release -a
No LSB modules are available.
Distributor ID: Ubuntu
Description: Ubuntu 14.04.1 LTS
Release: 14.04
Codename: ...

remember that under ubuntu, Network-manager manages networks. If you want to do it manually, first stop network-manager:
sudo service network-manager stop
then check your config in...

you can customize a live cd with mkisofs command and then load a kernel. I have personally never tried, but I think you need a certain linux experience first.

I format a usb key:

mkfs -t ext4 /dev/sdf1
mkfs -t ext4 /dev/sdf2

(also tried mkfs.ext4 /dev/sdfx and mke2fs -t ext4 /dev/sdfx)
and have the following:

# fdisk -l
[...]
Device...

I want to replace the third and fourth lines of a 2nd file by the first two lines of a file.

Input:
file_1
file_1.line_1
file_1.line_2

file_2

file_2.line_1
<file_2.line_2_blank>...

Eh, thanx a bunch for your posts guys indeed !
Chubler, my list was built with nc (sometimes, connection is ok with nc but not with firefox)
My script is running now (I sent the post from a proxy...

I found what was the problem;

Running:

/usr/bin/mousepad &sleep 3;pkill mousepad

works. I put 'sleep 3' for testing purpose; we can put whatever command we want.

thanx guys!
...

thanx in2nix4life
I have already tried that:
mousepad&;pkill mousepad
bash: syntax error near unexpected token `;'

to kill a program in bash, for instance 'mousepad' I use
kill $(pidof mousepad);
or
pkill mousepad

But it only works if we use another bash window;

If it is started from the same bash,...

thank you mate!

I launch 'netstat -a', if string 'ESTABLISHED' found, then VAR=1

#!/bin/bash
VAR=0;
netstat -a | awk '$6 ~ /ESTABLISHED/ {VAR=1}'

I cannot find the right syntax.

thanx guys!

I have a list of ip socks / port(eg: 192.168.0.1 80). I would like to write a bash to test automatically these addresses in a loop with firefox. The problem is that firefox process stays alive even...

Thanx again Scrutinizer;
Your solution with grep is pretty cool.
To be honest, the missing -"- was a typo. it gave additional work. Sorry for that. Have a nice day!

thanx again Scrutinizer!

both
awk -F'ip=[(]|[)]|port="?|"' '/ip=/{print $2,$4}' file
and
sed -n 's/.*ip=(\([^)]*\).*port="*\([^"]*\).*/\1 \2/p' file

work. (do you know how to do it with...

thanx Scrutinizer

awk -F'port="?|"' '/ip=/{print $2}' file
prints ports only.

I have got a text
from each line, I need to fetch port only if there is an ip

a.text text and port=25
b.ip=(12.32.54.256) and port="52"
c.ip=(55.251.253.12) and port=25"
d.text text and...

thank you.

I start my laptop, so the cache should be empty , anyway, I issue:
arp -n
there is no entry for wlan0. Anyway, I flush everything:
sudo ip -s -s neigh flush all
-> msg: Nothing...

ubuntu / xubuntu 13.10 and 14.04 (this issue should exist in debian as well)

I use wifi to connect to internet. I would like to change the wifi card mac address before connecting. Let's call the...

Hello folks !

I am trying to set up my firewall the way it's done in this link:

in google, 'rusty's really quick guide to packet filtering' (cannot put web link in my post).

here is my fw...