Tag: Linux

Install Google Chromium on Backtrack 5 R3

Posted on by admin

Google Chrome is an alternative web browser beside Mozilla Firefox. It’s free and open source. But the problem Google Chrome on Backtrack 5 is Google Chrome can’t run in root mode. We know that Backtrack run the root mode by default. If you run the Google Chrome it won’t work. So if you want to install and run Google Chrome in root this is the tutorial.

Download the Google Chrome first

apt-get install chromium-browser

Access the Chrome directory

cd /usr/lib/chromium-browser

And here we go, open chromium-browser with hexaedit to edit the hexa code of chromium-browser

hexedit chromium-browser

Search for geteuid and replace with getppid. Press TAB and search (CTRL+S) for geteuid and change it to getppid and press CTRL+X.
Try to run the Google Chrome.
nJoy 😉

How to recognize the hardware platform you are running on.

Posted on by admin

It is sometimes required especially when managing many servers to recognize the hardware setup you are running on especially if you have a zoo of different animals. 

Great tool for getting detailed hardware report including bios versions and memory / processor info :

 

dmidecode

While the output varies slightly across distros and sometimes you need to install it e.g.

 yum -y install dmidecode

It is a great tool for understanding the underlying system and to know if you’re on a VM or not.

 

nJoy 😉

Installing Bacula Client on Centos

Posted on by admin

So the story goes like this :

 

wget http://sourceforge.net/projects/bacula/files/latest/download?source=files

 

tar zxvf bacula-*.tar.gz

cd bacula-<fiolder>

./configure –enable-client-only

make
make install
make install-autostart-fd

 

 

 

nJoy 😉

Reset Mysql password from bash prompt

Posted on by admin

You can recover MySQL database server password with following five easy steps.

Step # 1: Stop the MySQL server process.

Step # 2: Start the MySQL (mysqld) server/daemon process with the –skip-grant-tables option so that it will not prompt for password.

Step # 3: Connect to mysql server as the root user.

Step # 4: Setup new mysql root account password i.e. reset mysql password.

Step # 5: Exit and restart the MySQL server.

Here are commands you need to type for each step (login as the root user):

Step # 1 : Stop mysql service

# /etc/init.d/mysql stop
Output:

Stopping MySQL database server: mysqld.

Step # 2: Start to MySQL server w/o password:

# mysqld_safe --skip-grant-tables &
Output:

[1] 5988
Starting mysqld daemon with databases from /var/lib/mysql
mysqld_safe[6025]: started

Step # 3: Connect to mysql server using mysql client:

# mysql -u root
Output:

Welcome to the MySQL monitor.  Commands end with ; or \g.
Your MySQL connection id is 1 to server version: 4.1.15-Debian_1-log
Type 'help;' or '\h' for help. Type '\c' to clear the buffer.
mysql>

Step # 4: Setup new MySQL root user password

mysql> use mysql;
mysql> update user set password=PASSWORD("NEW-ROOT-PASSWORD") where User='root';
mysql> flush privileges;
mysql> quit

Step # 5: Stop MySQL Server:

# /etc/init.d/mysql stop
Output:

Stopping MySQL database server: mysqld
STOPPING server from pid file /var/run/mysqld/mysqld.pid
mysqld_safe[6186]: ended
[1]+  Done                    mysqld_safe --skip-grant-tables

Step # 6: Start MySQL server and test it

# /etc/init.d/mysql start
# mysql -u root -p

 

Voila !

 

nJoy  😉

Setting a route for a nic in Linux

Posted on by admin

In file named after the interface you want to use as gateway:

e.g. /etc/sysconfig/network-scripts/route-eth0

 

Create entries :

 

ADDRESS=192.168.4.0
NETMASK=255.255.255.0
GATEWAY=192.168.1.250

NnJoy 🙂

Limiting access iptables

Posted on by admin

This is a Script that I use to deploy and script iptables.

Sample handles ssh and mysql it’s easy to extend.

#!/bin/bash
#
# iptables example configuration script
#
# Flush all current rules from iptables
#
 iptables -F
#
# Allow SSH connections on tcp port 22
# This is essential when working on remote servers via SSH to prevent locking yourself out of the system
#
# iptables -A INPUT -p tcp --dport 22 -j ACCEPT
# SSH  rules
iptables -A INPUT -i eth0 -p tcp -s 193.50.90.251 --dport 22 -m state --state NEW,ESTABLISHED -j ACCEPT
iptables -A INPUT -i eth0 -p tcp -s 212.164.176.98 --dport 22 -m state --state NEW,ESTABLISHED -j ACCEPT

iptables -A OUTPUT -o eth0 -p tcp --sport 22 -m state --state ESTABLISHED -j ACCEPT


# mysql rules
iptables -A INPUT -i eth0 -p tcp -s 193.50.90.251 --dport 3306 -m state --state NEW,ESTABLISHED -j ACCEPT
iptables -A INPUT -i eth0 -p tcp -s 212.164.176.98 --dport 3306 -m state --state NEW,ESTABLISHED -j ACCEPT
#Allow frontend 1
iptables -A INPUT -i eth0 -p tcp -s 191.94.70.36 --dport 3306 -m state --state NEW,ESTABLISHED -j ACCEPT
#Allow Frontend 2
iptables -A INPUT -i eth0 -p tcp -s 191.94.70.38 --dport 3306 -m state --state NEW,ESTABLISHED -j ACCEPT

iptables -A OUTPUT -o eth0 -p tcp --sport 3306 -m state --state ESTABLISHED -j ACCEPT




#
# Set default policies for INPUT, FORWARD and OUTPUT chains
#
 iptables -P INPUT DROP
 iptables -P FORWARD DROP
 iptables -P OUTPUT ACCEPT
#
# Set access for localhost
#
 iptables -A INPUT -i lo -j ACCEPT
#
# Accept packets belonging to established and related connections
#
 iptables -A INPUT -m state --state ESTABLISHED,RELATED -j ACCEPT
#
# Save settings
#
 /sbin/service iptables save
#
# List rules
#
 iptables -L -v

nJoy 🙂

Starting vnc on Display 0 ( local display ) from a remote ssh session

Posted on by admin

i.e. You wnet home need your desktop have ssh no vnc !! Here is the easy solution..

Install x11vnc.

$ DISPLAY=localhost:0 x11vnc &

connect to the display using vnc et voila !

BTW Teamviewer also USED TO WORK but no longer in ver 8 so thanks VNC for not being obsolete..

nJoy 🙂