Showing posts from December, 2011

How to check and open ports in Linux

The most common host-based tool for checking for open ports on Windows or Unix systems is the netstat command.

To see open TCP Network Ports :- 
vishal@vyas:~# netstat -vatn

To see DNS Hostnames :- 
vishal@vyas:~# netstat -vat

To see open UDP Network Ports:- 
vishal@vyas:~# netstat -vaun


Nmap (“Network Mapper”) is an open source tool for network exploration and security auditing. Nmap can provide further information on targets, including reverse DNS names, operating system guesses, device types, and MAC addresses.

vishal@vyas:~#nmap -sS

Starting Nmap 4.53 ( ) at 2011-12-26 12:35 IST
Interesting ports on (
Not shown: 1703 closed ports
22/tcp    open  ssh
80/tcp    open  http
110/tcp   open  pop3
111/tcp   open  rpcbind
139/tcp   open  netbios-ssn
143/tcp   open  imap
445/tcp   open  microsoft-ds
993/tcp   open  imaps
995/tcp   open  pop3s
3306/tcp  open  mys…

How to Install MySQL on Linux

I will explain how to install MySQL on Linux [Redhat, Fedora] platform.

Type the following command as root user:
# yum install mysql-server mysql

Start MySQL Service:-
To start mysql server type the following command:-
# chkconfig mysqld on
# /etc/init.d/mysqld start

 Setup mysql root password:-
# mysqladmin -u root password yourpass

Connecting to MySQL:-
# mysql -u root -p
Enter password:
Welcome to the MySQL monitor.  Commands end with ; or \g.
Your MySQL connection id is 7369

Vishal Vyas