LAMP & Oracle Technical Information

After Linux installation, sometimes OS recognize network card and so on. To fix a problem, you have to install an appropriate driver.

1. Move the base driver tar file to the directory of your choice.  For  example, use /home/username/e1000e or /usr/local/src/e1000e.

2. Untar/unzip archive:

3. Change to the driver src directory:

If you install Oracle database, the first system check that you should is to determine the kernel release level of the Linux operating system that you have installed.
Oracle supports Oracle 10g & 11g on any 2.6 kernel with the base release of Red Hat or SUSE.
The following command should tell you the kernel release level.

• Hardware RAID

The hardware-based array manages the RAID subsystem independently from the host. It presents a single disk per RAID array to the host.
A Hardware RAID device connects to the SCSI controller and presents the RAID arrays as a single SCSI drive. An external RAID system moves all RAID handling
"intelligence" into a controller located in the external disk subsystem. The whole subsystem is connected to the host via a normal SCSI controller and appears to
the host as a single disk.

When you change your network configuration (IP Address), There are two ways ("setup command" or change related files manually)
to do that. setup command might be easy for change, but you want to know how to change it manually.

1. Login a Linux Server as root.

2. Check your IP address using ifconfig command.

Error 1130 is a networking error. The server cannot resolve the hostname of the client. Or the host is not allowed to connect to the MySQL server.

First you should check a user in the remort server in order to login, If not there, You have to create a user for remote login.

There is no your host name, the following command can create user.

If you get the following error, You should recreate a slave database.
It might be easy to fix the problem.

1. Stop slave

2. Delete files

A simplest way to redirect mail (either from users who don't exist, or from users who do exist) is with the /etc/aliases file.
The format is pretty simple:

The Mail utility allows you to compose, send, receive, forward, and reply to mail. mail has two main modes: compose mode, in which you create
a message, and command mode, in which you manage your mail.

You can also provide much of the information on the command line, as shown in the following example:

If you want to send the user outside of the server.

Secure Shell is a program to log into another computer over a network, to execute commands in a remote machine, and to move files from one machine
to another. It provides strong authentication and secure communications over insecure channels. It is a replacement for rlogin, rsh, rcp, and rdist.
SSH protects a network from attacks such as IP spoofing, IP source routing, and DNS spoofing. An attacker who has managed to take over a network
can only force ssh to disconnect. He or she cannot play back the traffic or hijack the connection when encryption is enabled.

The chkconfig command can also be used to activate and deactivate services. If you use the chkconfig --list  command, you will see a list of system services
and whether they are started (on) or stopped (off) in runlevels 0-6 (at the end of the list, you will see a section for the services managed by xinetd.

If you use chkconfig --list to query a service managed by xinetd, you will see whether the xinetd service is enabled (on) or disabled (off). For example,
the following command shows that finger is enabled as an xinetd service: