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  • alamgir shaikh 21:42 on February 21, 2015 Permalink | Reply
    Tags: , lvm, ,   

    Logical Volume Manager (LVM) Cheat Sheet 

    Logical Volume Manager (LVM)

    This is a quick and dirty cheat sheet on LVM using Linux, I have highlighted many of the common attributes for each command however this is not an extensive list, make sure you look up the command.

    With the pvs, vgs and lvs commands, the number of verboses added the more verbose information for example pvs -vvvvv

    (More …)

     
  • alamgir shaikh 21:41 on February 21, 2015 Permalink | Reply
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    Red Hat Multipathing 

    This is a short document describing the Device Mapper Multipath (DM-Multipath) which is a feature of Red Hat Linux REL 5. DM-Multipath allows you to configure multiple I/O paths from your server to your storage device (SAN, etc). These are physical paths that include HBA, cables and switches. Multipathing aggregates the I/O paths, creating a new device that consists of the aggregated paths.

    DM-Multipathing can provide the following (More …)

     
  • alamgir shaikh 21:38 on February 21, 2015 Permalink | Reply
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    PXE Installation 

    Red Hat allows you to install the OS over the network using NFS, FTP or HTTP. If the hardware supports PXE (Pre-eXecution Environment) the NIC card will send out a broadcast request for DHCP information. The DHCP server provides the client with a IP address and other network infomation such as the TFTP server address (which provides the files necessary to start the installation) and the location of the files on the TFTP server. This is possible because of PXELINUX, which is part of the syslinux package.

    In order to setup a PXE installation the following must be carried out: (More …)

     
  • alamgir shaikh 21:36 on February 21, 2015 Permalink | Reply
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    Install and configuring a Rockwell HCF modem 

    This document will explain how to install a Rockwell HCF Modem into a Compaq Deskpro server running Red Hat Linux 9. There are a number of issues when installing a Rockwell HCF Modem in Red Hat, the main one being what drivers to obtain.

    Obtain Modem information

    In order to find out what driver was required you need to obtain the following information:

    • Card Name
    • Vendor ID
    • Driver ID

    This will then provide the information required to obtain the correct driver.

    1. Install the modem into a spare PCI slot and power on the computer.
    2. Red Hat normally fails to recognise the card during the “found new hardware phase”
    3. Run the following command to obtain the location of the card

    (More …)

     
  • alamgir shaikh 21:35 on February 21, 2015 Permalink | Reply
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    Red Hat Software Raid 

    This is a quick and dirty document on software raid there are many more documents on the web that go into greater detail, the following is covered in this document:

    • Creating a raid array with a hot spare
    • Checking the array
    • Simulating a drive failure
    • Removing a disk from an array
    • Adding a disk to the array
    • Extend the array
    • Starting stopping array

    (More …)

     
  • alamgir shaikh 21:33 on February 21, 2015 Permalink | Reply
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    Compiling and Installing a custom kernel 

    Updating a kernel is not a difficult task, although you should backup your working kernel just in case. The basic steps are to build the new kernel and modules then update your boot manager configuration (GRUB or lilo). However if you make a mistake you can simply boot from your old kernel.

    There are a number of reason why you would want to rebuild a kernel

    • Greatly improve the speed at which kernel services run by building in direct support for often-used drivers and dynamically loading less frequently needed drivers as modules

    (More …)

     
  • alamgir shaikh 21:31 on February 21, 2015 Permalink | Reply
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    Red Hat Linux Tasks 

    Setup telnet server

    # rpm -ivh xinetd.????                  insert lastest revision

    1. rpm -ivh telnet-server.????           insert lastest revision

    edit the telnet config file

    1. cd /etc/inetd.d
    2. vi telnet                             change disable option to “no”

    restart the xinetd service

    1. service xinetd restart

    (More …)

     
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