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udev is introduced with the 2.6 kernel (ie not available in RHEL3 and before)And that is solely for device name persistence. It is mainly a problem whendisks are external / via HBA, and the names across reboots and/or clusters mightnot be the same. We have been using devlabel to be able to get some persistence…
Say we have a LVM’ed /dev/sdd1 and we have to mount logical volume LogVol00 in it.. # file -s /dev/sdd1 /dev/sdd1: LVM2 (Linux Logical Volume Manager) , UUID: 7zKduhTHsMa3YD3t2gocYKUDGRP5QvW # vgscan Reading all physical volumes. This may take a while… Found volume group “VolGroup00” using metadata type lvm2 # vgchange -a y VolGroup00 2 logical…
Configuring a PXE boot server Install required packages: # yum install bind dhcp system-config-netboot tftp-server Setup dhcpd: # vi /etc/dhcpd.confddns-update-style interim;ignore client-updates; subnet 10.10.10.0 netmask 255.255.255.0 { option routers 10.10.10.1; option subnet-mask 255.255.255.0; option domain-name-servers 10.10.10.1; option time-offset 7200; range dynamic-bootp 10.10.10.10 10.10.10.15; default-lease-time 21600; max-lease-time 43200; next-server 10.10.10.1; option subnet-mask 255.255.255.0; option broadcast-address 10.10.10.255;…
Converting .nrg image to .iso: Fedora:# yum install nrg2iso…$ nrg2iso image.nrg image.iso Note that your .nrg image might already be an ISO (at leas a UDF dump) so you can use it to burn to DVD using GnomeBaker
That is actually a good idea .. it handles switch HA in addition to NIC HA .. And having them on different vlans? .. that is actually somehow mandatory .. you cannot have two switches in a LAN (or VLAN) per its function
Yes .. The nics are slaves to a bond. The bond can be configured to be on more than one vlan with the vconfig command.
active-backup is active/backup .. requires ISL for HA and so on .. but broadcast.. yes .. that sends the packets twice (thrice etc.), eachfor and through every slave.. so theoretically the performance is thesame as if it was on a single link. practically there is some minoroverhead since the HW needs to queue the packet…
Read More “Linux NIC bonding: active-backup v.s. broadcast” »
On my D630 and Dell D-Port Replicator running OEL5U2 I cannot get any sound from the jack on the port replicator. Thanks to http://ubuntuforums.org/showthread.php?p=2218245#post2218245 below is the way to get it running: In the volume control, under the switches tab, enable IEC958. If theswitch isn’t there, unhide it from within the preferences menu. You may…
I have been playing with this for some time .. Below are patches over Cisco VPN client 4.8 rev 490 some are compiled from around and some are my own ports (especially for 2.6.24+ ): For 2.6.18 based kernels (OEL/RHEL/CentOS 5), download and apply vpnclient-4.8-2.6.18-XceptN.patch on your vpnclient build directory. e.g.: # wget -q http://xceptn.com/patches/vpnclient/vpnclient-4.8-2.6.18-XceptN.patch…
Read More “Cisco VPN Client 4.8 and Recent Linux Kernel Versions” »
For especially Firefox 3.0 (beta) be sure that your xulrunner packageis intact.. Otherwise firefox will not work at all / or at leastappropriately.