Edit configuration files stored in /etc/sysconfig/network-scripts/
You can configure network card by editing text files stored in /etc/sysconfig/network-scripts/ directory. First change directory to /etc/sysconfig/network-scripts/:
# cd /etc/sysconfig/network-scripts/
You need to edit / create files as follows:
* /etc/sysconfig/network-scripts/ifcfg-eth0 : First Ethernet card configuration file
* /etc/sysconfig/network-scripts/ifcfg-eth1 : Second Ethernet card configuration file
To edit/create first NIC file, type command:
# vi ifcfg-eth0
Append/modify […]

Introduction
As an operating system that has gained a strong market share in the server environment, firewall applications have always been important to Linux, and Linux kernels have had packet filtering since the 1.1 series.
In 1994, Alan Cox created ipfwadm, the first firewall for Linux, which was based on ipfw from BSD and was enhanced for […]

#vipw
Edit or no Edit path of Home directory & save
#vi /usr/local/etc/proftpd.conf
find line :
[…]
#DefaultRoot ~
[…]
uncomment # to
[…]
DefaultRoot ~
[…]
save file
Restart FTP deamon
/usr/local/etc/rc.d/proftpd retstart

If you forgot you password for your ubuntu system you can recover using the following stepsTurn your computer on.
Press ESC at the grub prompt.
Press e for edit.
Highlight the line that begins kernel ………, press e
Go to the very end of the line, add rw init=/bin/bash
press enter, then press b to boot your system.
Your system will […]

Some time you might find some applications are having only .rpm files but you want a .deb package for your debian,Ubuntu and other debian derived ditributions.If you can’t find .deb debian package in any of the debian,ubuntu repositories or elsewhere, you can use the alien package converter to install the .rpm file.Alien is a program […]

MySQL is a relational database management system (RDBMS) based on SQL (Structured Query Language). First released in January, 1998, MySQL is now one component of parent company MySQL AB’s product line of database servers and development tools. Yes, it really is this easy.run the following command to change the mysql root password
sudo /etc/init.d/mysql reset-password
New MySQL […]

Sometimes you want to restart your Apache server after changing some configuration in your virutual hosts,sites etc, but you have few hundred clients currently downloading files from your server and you don’t want to disconnect them.You need to use the following command
sudo /etc/init.d/apache2 graceful
This will gracefully restart your Apache with new configuration without affecting your […]

1. Telnet using TCP port 25 :
#telnet xxx.xxx.xxx.xxx 25
or
#telnet domain.tld 25
2. Issue the following smtp command sequence
helo <your domain name><enter>
response should be as follows
250 OK
mail from: <your Email Address><enter>
response should be as follows
250 OK - mail from <your Email address>
rcpt to: <recipient address><enter>
response should be as follows
250 OK - Recipient <recipient address>
data<enter>
response should be as […]

fsck is a Unix utility for checking and repairing file system inconsistencies . File system can become inconsistent due to several reasons and the most common is abnormal shutdown due to hardware failure , power failure or switching off the system without proper shutdown . Due to these reasons the superblock in a file system […]

Default package can’t support mysql 5.1.
There are some solutions to solve this problem. For example, You can install the non-RPM packages which can be downloaded from official web(www.mysql.org). But, my choice is to add some other package sources into source.list.
Edit file :
#vi /etc/apt/sources.list
add new line :
deb http://ppa.launchpad.net/monty/ubuntu gutsy main universe restricted multiverse
deb http://ppa.launchpad.net/smurf/ubuntu gutsy main […]