My IT Blog

 Steps:  1. Update the kernel   a. use 'uname -a' to reveal current version   b. use 'rpm -qa | grep -i kernel' - to reveal installed version   c. cat /etc/grub.conf -> /boot/grub/grub.conf - "" ""  2. Proper installation method is as follows:   a. 'rpm -ivh kernel*rpm' - install a separate version Note: Install the following kernel packages if necessary:   a. kernel-devel* - if module compilation is necessary   b. kernel-headers* - if recompilation is necessary Install:   a. rpm -ivh kernel-2.6.18-53.el5.i686.rpm   Note: This will update GRUB (/boot/grub/grub.conf) Note: Will also place the new kernel in the /boot file system Examine traces in:  a. /boot  b. /boot/grub/grub.conf 3. Remove traces of former kernel using 'rpm -e [--nodeps]'  a. kernel-2.6.18-8.el5 - removes older version  b. kernel-headers-2.6.18-8.el5 - force remove ignoring dependencies 'rpm -e --nodeps kernel-headers-2.6.18-8.el5'...

I would include a few PowerShell scripts here that can be used to modify the tombstone lifetime along with the deleted object lifetime. Remember that the default for both of these is going to be 180 days and will show up as Null if you use LDP to view the attributes. PowerShell Script to change the tombstone lifetime of my domain (AdminPrep.Local) to 250 days: Set-ADObject -Identity “CN=Directory Service,CN=Windows NT,CN=Services,CN=Configuration,DC=AdminPrep,DC=Local” –Partition “CN=Configuration,DC=AdminPrep,DC=Local” –Replace:@{“tombstoneLifetime” = 250} PowerShell Script to change the deleted object lifetime: Set-ADObject -Identity “CN=Directory Service,CN=Windows NT,CN=Services,CN=Configuration,DC=AdminPrep,DC=Local” –Partition “CN=Configuration,DC=AdminPrep,DC=Local” –Replace:@{“msDS-DeletedObjectLifetime” = 250} Courtesy : LazySysAdmin

What is NIS? Network Information Service (NIS) is used for keeping a centralized repository of users, hostnames and other useful information in a computer network. In single server UNIX environments, the list of users and groups is usually kept in a file such as  /etc/passwd . Using NIS adds a "global" directory which is used for authenticating users from any host on the network. Install the Packages: Install the  yp-tools, ypbind and  ypserv  rpm packages on the server. [root@nissrv1 /]# rpm -qa |grep ypbind ypbind-1.12-5.21.6 [root@ nissrv1 /]# rpm -qa |grep ypserv ypserv-2.8-7 [root@ nissrv1 /]# rpm -qa |grep yp-tools yp-tools-2.8-6 Defining the NIS Domain Name: Edit the  /etc/sysconfig/network  file  We need to add the NIS domain name we wish to use in the /etc/sysconfig/network file.  For this example, we will call the domain "LINUX-NIS".  #/etc/sysconfig/network NISDOMAIN="LINUX-NIS"   Note : Use Non-FQDN Names.Edit /...

1. Install and configure the DHCPD server 02. Install tftp server and enable TFTP service a. yum install tftp-server b. Enable TFTP server. vi /etc/xinetd.d/tftp and change disable to 'no' c. service xinetd restart 03. Install syslinux if not already installed a. yum install syslinux 04. Copy needed files from syslinux to the tftpboot directory cp /usr/lib/syslinux/pxelinux.0 /tftpboot cp /usr/lib/syslinux/menu.c32 /tftpboot cp /usr/lib/syslinux/memdisk /tftpboot cp /usr/lib/syslinux/mboot.c32 /tftpboot cp /usr/lib/syslinux/chain.c32 /tftpboot 04. Create the directory for your PXE menus mkdir /tftpboot/pxelinux.cfg 05. For each "Release" and "ARCH" Copy vmlinuz and initrd.img from /images/pxeboot/ directory on "disc 1" of that $Release/$ARCH to /tftpboot/images/RHEL/$ARCH/$RELEASE mkdir -p /tftpboot/images/RHEL/i386/4.3 mkdir -p /tftpboot/images/RHEL/i386/5.5 mkdir -p /tftpboot/images/RHEL/x86_64/4.3 mkd...