Question about Red Hat Enterprise ES 4 for Linux

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Linux I have a workgroup set up with users using windows client and linux server(redhat and Centos) Since we put in the new server which uses Centos and transferred all the data, on of the databases in MSAccess 03 is only allowing one user at a time. There is no error message but if one person is using the DB then when another person opens it up nothing happens, but as soon as the other person is logged out they can log in. any help? Thanks R

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Opportunistic locking problems.
Since it's samba, you'll need to a line like this on the share used for the .mdb in question:

oplocks = False
oplocks = False
veto oplock files = /*.mdb/*.MDB/*.LDB/*.ldb/

and restart Samba, or just wait a minute until it sees the change.

Posted on May 30, 2009

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Can't do any thing here. you have to call Microsoft to buy a multi-user version of Access.
the Access program came with the Microsoft Suite is design for single user.

Posted on May 22, 2009

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I am unable to install centOS 5.5 or openfiler to a supermicro server with an areca 1210 controller. The lofigal volume size is 200MB (the drives are actually 2TB each, but I carved out a 200mb part for...
i think you must see this specification first, and then you will know why your centOS unabled to install areca ARC-1210 serial ATA controller, if you was see at that site, it describe that areca Software Drivers arrow.gif Windows 7/2008/Vista/Server 2003/XP/2000 arrow.gif Redhat Linux and SuSE Linux arrow.gif FreeBSD arrow.gif Solaris 10x86 arrow.gif UnixWare 7.1.x arrow.gif Netware 6.5 arrow.gif Mac OS 10.4.x/10.5.x/10.6.x (EFI BIOS support)

i hope this helpfull
please rate my answer

Dec 24, 2010 | Areca ARC-1210 Serial ATA Controller


How to Setup Linux Mail Server

<p><span>Email is an important part of any Web site that you create. In a home environment, a free web based email service may be sufficient, but if you are running a business, then a dedicated mail server will be required. <span>A mail server is an application that receives incoming e-mail from local users (people within the same</span><span> </span><span><span>domain)</span> and remote senders and forwards outgoing e-mail for delivery, as example Microsoft</span><span> </span><span><span>Exchange</span>, Gmail,</span><span> </span><span><span>etc.</span></span></span><span> <span> </span></span><span><span>The system uses</span></span><span><span> </span></span><span><span>SMTP </span></span><span><span>(Simple Mail Transfer Protocol) or <span>ESMTP </span>(extended SMTP) for sending e-mail, and either</span></span><span><span> </span></span><span><span>POP3</span></span><span><span> </span></span><span><span>(Post Office Protocol 3) or <span>IMAP</span></span></span><span><span> </span></span><span><span>(Internet Message Access Protocol) for receiving e-mail</span></span><span><span>. </span></span><span><span>In windows forum</span></span><span><span> most of workstations are use Microsoft Exchange server or outlook express. In Linux forum there have also an easiest option to send and receive mail. In Linux configuration of mail server is easy flexible too.</span></span><span></SPAN><br> <p><span><span> </SPAN>In most of Linux workstation RedHat Linux are used for their Server. In RedHat Linux we use sendmail to create a mail server that will relay your mail to a remote user's mailbox or incoming mail to a local mail box. On our RedHat we will find sendmail's configuration file as /etc/ If you download and compile sendmail you would find it in /etc/mail/ To configure sendmail you have basically 2 options. Either you edit the file directly or you create the from an m4 file such as Here to explain the process I will list the steps to produce a custom file.</SPAN><br> <p><span></SPAN> <br> <p><span><span><b>SendMail Configuration:</b></SPAN></SPAN><span> </SPAN><span><span> </SPAN>In Redhat Linux dovecot and sendmail packages are used as service demon for Mail server. At first I install the available sendmail RPM package by YUM and also the dovecot RPM. After installation first I have edit the sendmail .mc file. After installation of sendmail package it locates as in /etc/mail. In the file I have find the line DAEMON_OPTION and edit it with # before the line to uncheck it. Then I find Local Domain and edit it also with the system FQDN. After editing save the file. After exiting from I moved this .mc file to with m4. Here the SendMail configuration is complete. Then I go to the /etc/dovecot.conf file and edit it. I just find the protocol line and uncheck this line. After that I save this .conf file. After all configurations I have start the service demons with chkconfig command and restart the both services. And the mail server was going on swiftly.</SPAN><br> <p><span><span> </SPAN>So it is very easiest job to configure a mail server in RedHat Linux enterprise server.</SPAN>

on Mar 21, 2011 | Computers & Internet


DHCP Server configuration in Linux

Linux is a UNIX based operating system. It is a server operating system. REDHAT Linux is Enterprise version of Linux. Now a day's Most of corporate sectors use red hat Linux as server in their company because it is secure very much.

Full form of DHCP "Dynamic Host Configuration Protocol. DHCP server assigns IP addresses and other network configuration information like subnet mask, broadcast address, etc to computers on a network. The DHCP assignments are the following.

Lease Request: Client broadcasts their request to DHCP server with a source address of and a destination address of
IP lease offer: DHCP server replies with an IP address, subnet mask, network gateway, name of the domain, name servers, duration of the lease and the IP address of the DHCP server.

Lease Selection: Client receives offer and broadcasts to al DHCP servers that will accept given offer so that other DHCP server need not make an offer.

The DHCP server then sends an ack to the client. The client is configured to use TCP/IP. Lease Renewal: When half of the lease time has expired, the client will issue a new request to the DHCP server.

Installation of DHCP server: First of all while install the RedHat Linux enterprise version server be careful about the ports and the services must be turned on. To create DHCP server in Linux first download DHCP RPM package and install with "rpm-ivh" command. Where I have done it there I have create YUM server, so easily I have download and install it by YUM (yum install dhcp version). DHCP package will locate in /usr/share/doc/at Linux file system. I copied the DHCP's files from /usr/share/doc/ to /etc/dhcpd.conf.. Then I started to configure the dhcpd.conf file to route the DHCP server in there local network. I have open the configuration file with "vi" command. Then commented out the lines from "default gateway to option netbios" because system don't read the commented lines. After that I set the range of IP address in dynamic- bootp of their local assumption of system. I have change the "next-server" with the dhcp server name and have also change the fixed address with the dhcp server IP address (end range of dynamic IP). It is very easy job to configure DHCP server. After configure the .conf file of dhcp just turn on the service with "chkconfig" command and restart the dhcp service. After that entire job I reboot the system. And after rebooting of server I turned on the other client system. While startup the client system without static IP address all of those picked up IP from dhcp server and going on successfully. I have prefer the command line mode to do the total job.
The DHCP server configure file is following:

ddns-update-style interim
ignore client-updates

subnet netmask {
# The range of IP addresses the server
# will issue to DHCP enabled PC clients
# booting up on the network

# Set the amount of time in seconds that
# a client may keep the IP address

default-lease-time 86400;
max-lease-time 86400;

# Set the default gateway to be used by
# the PC clients

option routers;
# Don't forward DHCP requests from this
# NIC interface to any other NIC
# interfaces

option ip-forwarding off;

# Set the broadcast address and subnet mask
# to be used by the DHCP clients

option broadcast-address;
option subnet-mask;

# Set the NTP server to be used by the
# DHCP clients

option ntp-servers;

# Set the DNS server to be used by the
# DHCP clients

option domain-name-servers;

# If you specify a WINS server for your Windows clients,
# you need to include the following option in the dhcpd.conf file:

option netbios-name-servers;

# You can also assign specific IP addresses based on the clients'
# ethernet MAC address as follows (Host's name is "laser-printer":

host laser-printer {
hardware ethernet 08:00:2b:4c:59:23;
# List an unused interface here
subnet netmask {

on Mar 17, 2011 | Computers & Internet

1 Answer

Linux drivers for Dell Poweredge 2650

try a search for Linux OR try you will need to set up an account but the account is FREE and no recurring charges You might even try that is Linux site and should be able to find your version there if it exists.. try the PLATFORMS link

May 18, 2009 | Dell PowerEdge 2650 (PE2650BB) Server


Set up a home office LAN which access internet through USB wireless gadget

The following networking job I have done in this Lab. It is enough for a small office to access or transfer file Printing and access of shared Internet in different type of operating system.

We have recently set up a home office (small laboratory) LAN. All the computers access the internet through a USB wireless (CMDA) dongle. The USB stick is Huawei EC168C and internet service provider is Reliance Infocom (India). But any USB internet dongle can be use to share internet in a LAN in the following way. And you don't need a router for that. In the areas where ISP cannot give wire line internet connection this type of USB wireless sticks are really helpful for home office.

Basic LAN Connection:

Here this lab has 4 PCs. One Windows XP, another Windows Vista starter and two RedHat Linux server systems. Here in this lab I have done the basic LAN connection using cat5 cable & RJ45 connector and an 8 port hub. I have connect the two windows based OS. Using cross cable I have connected two windows system with the hub. Then I put static IP address in Ipv4 of TCP/IP. After that I set workgroup name to join in a workgroup in windows PCs. Then I tried to ping the systems, and it was pinging. Then I have setup a home or small office network in both windows system. That I have enabled the Printer sharing. After that I can share file, data and printer through the system gateway.

Now I have to connect other two Linux PCs in this network. With same cross cable I have joined the both Linux system with the hub. Then to detect the Ethernet device I have put down "DEVICE=eth0" entry in /etc/sysconfig/network-scripts/ifcfg-eth0 file. Then I set IP address in Ethernet device in network configuration in graphical mode (or System-config-network in text mode).After doing this job I restart the network service with "service network restart" command. Then I am trying to ping the systems to one another, And It was pinging.

Now Linux system can access with each other and files also shared through SSH, Telnet,FTP using process and command.

Linux Configuration:

I have configured the Linux system in the following way. First I have set the host name in /etc/sysconfig/network file by VI editor. Next I have edit /etc/sysconfig/network-scripts/ifcfg-eth0 file with "Device=eth0" to detect the Ethernet device. After that I have put the IP add in network configuration file and Restart the network service. To keep the eth0 on permanently I also use the chkconfig command.

After doing this job File sharing can be possible through network file sharing (Nfs). I have install Nfs package & shared the nfs dir by editing exports file. Then I am trying to automount the NFS dir by automounting process. So that I put automounting entry of nfs file in fstab file. After that it's automounted in other system's mount location.

Windows & Linux Networking:

Through basic LAN both OS can only ping each other. To share file or data samba server (a client server in Linux) must be configured in Linux system. So I Install smb rpm package from yum repository. Then I have Configure the samba/smb.conf file. I put the Workgroup name on Workgroup column of samba/smb.conf file. Then I Set the network IP without host to route in network in Host allow column. At last I put down all details of Samba dir, users at the end of the configuration file set the samba password. After that I restart the samba demon to up the samba server. Now files can shared through samba server. In windows I Set the workgroup name pairs with samba server and also set username and password same as samba server. Now I trying to send or access file through samba in both OS and it happened.

USB Net Connect:

Here in this lab workers are use internet from an Usb net connect. So it must be shared in Network. It is too fast so shared internet can be access easily. In Windows XP system I connect the USB netconnect & share it in network. IF all the network setting is ok then all the systems can access shared internet through gateway. Here all users use this shared internet now.

Access of Another System:
VNC Server & Viewer is software through which we can access of another system easily. I just install the software & set the password. Then I run the vnc server. After that I Put the IP add of vncserver from vncviewer of another system and type the password & start access the vnc server system. It can be access form WAN also. I just Run the Vnc server and connect the internet and I got a Wan IP add provided by ISP.

on Jan 12, 2011 | Network Computing Devices (NSH800S/A)...

1 Answer

Installing Image on Linux server through network

If you're using any any flavor of redhat (RHEL, CentOS, Fedora), this can be easily done using kickstart. It's a preconfiguration utility to allow a user to simply type a single one line command after booting from a cd, and completely install a whole server remotely. Comment back with your linux distro, and maybe I can give more specific details.

Sep 05, 2008 | Computers & Internet

1 Answer

How to configure samba server

Hi satveergaur

Follow these instruction to configure samba server

To configure Samba using a graphical interface, use the Samba Server Configuration Tool.

The Samba Server Configuration Tool is a graphical interface for managing Samba shares, users, and basic server settings. It modifies the configuration files in the /etc/samba/ directory. Any changes to these files not made using the application are preserved.

To use this application, you must be running the X Window System, have root privileges, and have the redhat-config-samba RPM package installed. To start the Samba Server Configuration Tool from the desktop, go to the Main Menu Button (on the Panel) => System Settings => Server Settings => Samba or type the command redhat-config-samba at a shell prompt (for example, in an XTerm or a GNOME terminal).

 Samba Server Configuration Tool

The Samba Server Configuration Tool does not display shared printers or the default stanza that allows users to view their own home directories on the Samba server.

 Configuring Server Settings

The first step in configuring a Samba server is to configure the basic settings for the server and a few security options. After starting the application, select Preferences => Server Settings from the pulldown menu. The Basic tab is displayed as shown in Figure 24-2.

 Configuring Basic Server Settings

On the Basic tab, specify which workgroup the computer should be in as well as a brief description of the computer. They correspond to the workgroup and server string options in smb.conf.

 Configuring Security Server Settings

The Security tab contains the following options:

Authentication Mode — This corresponds to the security option. Select one of the following types of authentication.

ADS — The Samba server acts as a domain member in an Active Directory Domain (ADS) realm. For this option, Kerberos must be installed and configured on the server, and Samba must become a member of the ADS realm using the net utility, which is part of the samba-client package. Refer to the net man page for details. This option does not configure Samba to be an ADS Controller.

Domain — The Samba server relies on a Windows NT Primary or Backup Domain Controller to verify the user. The server passes the username and password to the Controller and waits for it to return. Specify the NetBIOS name of the Primary or Backup Domain Controller in the Authentication Server field.

The Encrypted Passwords option must be set to Yes if this is selected.

Server — The Samba server tries to verify the username and password combination by passing them to another Samba server. If it can not, the server tries to verify using the user authentication mode. Specify the NetBIOS name of the other Samba server in the Authentication Server field.

Share — Samba users do not have to enter a username and password combination on a per Samba server basis. They are not prompted for a username and password until they try to connect to a specific shared directory from a Samba server.

User — (Default) Samba users must provide a valid username and password on a per Samba server basis. Select this option if you want the Windows Username option to work. Refer to Section Managing Samba Users for details.

Encrypt Passwords — This option must be enabled if the clients are connecting from a Windows 98, Windows NT 4.0 with Service Pack 3, or other more recent versions of Microsoft Windows. The passwords are transfered between the server and the client in an encrypted format instead of in as a plain-text word that can be intercepted. This corresponds to the encrypted passwords option. Refer to Section 24.2.3 Encrypted Passwords for more information about encrypted Samba passwords.

Guest Account — When users or guest users log into a Samba server, they must be mapped to a valid user on the server. Select one of the existing usernames on the system to be the guest Samba account. When guests logs in to the Samba server, they have the same privileges as this user. This corresponds to the guest account option.

After clicking OK, the changes are written to the configuration file and the daemon is restart; thus, the changes take effect immediately.

 Managing Samba Users

The Samba Server Configuration Tool requires that an existing user account be active on the system acting as the Samba server before a Samba user can be added. The Samba user is associated with the existing user account.

To add a Samba user, select Preferences => Samba Users from the pulldown menu, and click the Add User button. On the Create New Samba User window select a Unix Username from the list of existing users on the local system.

If the user has a different username on a Windows machine and will be logging into the Samba server from the Windows machine, specify that Windows username in the Windows Username field. The Authentication Mode on the Security tab of the Server Settings preferences must be set to User for this option to work.

Also configure a Samba Password for the Samba User and confirm the Samba Password by typing it again. Even if you select to use encrypted passwords for Samba, it is recommended that the Samba passwords for all users are different from their system passwords.

To edit an existing user, select the user from the list, and click Edit User. To delete an existing Samba user, select the user, and click the Delete User button. Deleting a Samba user does not delete the associated system user account.

The users are modified immediately after clicking the OK button.

Starting and Stopping the Server

On the server that is sharing directories via Samba, the smb service must be running.

View the status of the Samba daemon with the following command: /sbin/service smb status

Start the daemon with the following command: /sbin/service smb start

Stop the daemon with the following command: /sbin/service smb stop

To start the smb service at boot time, use the command: /sbin/chkconfig --level 345 smb on


Jun 06, 2008 | Computers & Internet

1 Answer

Linux operating system show me the low bandwidth

This sounds like your Net cards are limiting your Band or that in your linux boxes you have set a bandwidth limit somewhere.


May 30, 2008 | Computers & Internet

2 Answers

Redhat es5

This model was found not to be 64bit but 32bit.

May 18, 2008 | HP Compaq ProLiant DL380 G4 Server

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