CentOS LiveCD 5.5 Release Notes
Translations of these release notes are available for the following languages :
The CentOS Development team is pleased to announce the availability of the CentOS LiveCD 5.5 for both i386 and x86_64 architectures. These LiveCD are based on our CentOS-5.5 i386 and x86_64 distributions.
You can get the CentOS LiveCD 5.5 from the CentOS mirrors:
- Filename: CentOS-5.5-i386-LiveCD-Release2.iso
- Size: 685MB
- MD5Sum: 1b5d7e5ff8f1d90c600a973a8e000877
- Filename: CentOS-5.5-x86_64-LiveCD.iso
- Size: 695MB
- MD5Sum: dd58026ece382bc0f87187ba3e42be7b
- SHA1Sum: 3a04aa81ef75f329bf245a8c4f02af8137a84fb8
We used the tools from the Fedora livecd-tools project to create the CentOS LiveCD 5.5 image. This toolset offers numerous advantages:
- all directories are writable
- a simpler LiveCD creation process
3. Packages and Applications
The LiveCD can be used as a Workstation, with the following software:
- openoffice.org 3.1.1
- firefox 3.0.18
- thunderbird 220.127.116.11
- pidgin 2.6.6
- gftp 2.0.18
- gimp 2.2.13
It can also be used as a rescue CD with the following tools:
- Full set of LVM and RAID command line tools
- Nmap and NMapFE
- samba-3.0.33 with cifs kernel support to connect to Windows file shares
- System Log Viewer
- GUI Hardware Device Manager
4. New features
4.1. Persistence feature
The long awaited persistence feature is now available. With livecd-tools 014-7 and later, it is possible to create a LiveUSB media featuring a persistent overlay. An overlay of a fixed size is appended to the standard filesystem. This overlay is a dynamically growing set of blocks that have been modified on the original LiveCD root filesystem. It is used to store data and configuration changes. The size of the overlay should be no more than 2048MB on a VFAT Flash drive. If you use an ext3 Flash drive, the size of the overlay should be no more than the size of the root filesystem of the LiveCD. This value is defined on the "part / <size in MB>" line of the LiveCD kickstart file. The official CentOS 5 LiveCD has a 4096MB root filesystem.
Using a smaller overlay than the root filesystem can produce errors as the space available on the overlay is filled up. In this case, the LiveCD root filesystem will act as if there still was space available on the overlay while in fact it is fully allocated. However, there are many advantages at using a smaller overlay than the root filesystem on smaller Flash drive (4GB and less) even if it can be filled up eventually. To erase the content of the overlay and return to the original state of the LiveCD, add the reset_overlay kernel parameter at boot time. This will effectively reset the overlay.
4.2. OpenOffice.org 3.1.1 is now included
openoffice.org 3.1.1 provides support for files created with Microsoft Office 2007 or Microsoft Office 2008 for Mac OS X (.docx, .xlsx, .pptx, etc)
4.3. Improved wireless network adapter driver
The iwlwifi driver is now included which result in better support for Intel Wireless devices. You will need to install manually the Intel microcode image corresponding to your hardware in /lib/firmware to activate your wireless adapter. The microcode images are available from the Intel webpage: http://www.intellinuxwireless.org/?n=downloads
4.4. ext4 support
The ext4 partitions of your system should now be detected automatically by the LiveCD.
5. Known Issues
- The original i386 LiveCD had issues with the Network Installation. A Release2 i386 LiveCD has been released to fix this problem.
- There is a report that trying to boot the LiveCD in text mode under VMware WS 6.5.2 does not work as expected.
The boot option called Boot from local drive may not work on your system.
- At boot time, the following harmless informative message will be displayed:
memory for crash kernel (0x0 to 0x0) not within permissible range
- Resuming after entering suspend mode may leave you system in an unstable state.
If you encounter video issues, you can force the use of a different video driver at boot time. Add the 'xdriver=<driver>' string on the menu entry to force the use of <driver>. Here is an example:
- At boot time, when presented with the boot options, press [Tab] to edit the menu entries
- Edit the first menu entry
- Add 'xdriver=i810' to the string starting with 'append' to force the use of the i810 video driver
6. Network Install
There is a "Network Install" option on the Live CD that is the same as our CentOS-5.5-i386-netinstall ISO. This option allows you to perform an FTP, HTTP, CD, Hard Drive or NFS install per these instructions:
(CD, NFS or Hard Drive installs require that you have downloaded the full CentOS tree or ISOs and taken the prerequisite steps to perform these installs per the above instructions, if you only have the LiveCD then you are NOT interested in these options)
If you desire to do a remote HTTP or FTP install from the Internet using the LiveCD, you can pick a mirror that is close to you from these public mirrors:
You can then find the path on that mirror to the "5/os/<arch>/" directory and use the paths for install where <arch> is the desired architecture (i386 or x86_64 for example). If you want to choose the mirror provided by "Linux Kernel Archives", in the above page click on the HTTP link for that mirror, then click 5 -> i386 -> os ... the full path for this mirror would be:
In the HTTP installation, use these paths based on the above mirror:
Server: mirrors.kernel.org Path: centos/5/os/i386
Other install locations are available by selecting a mirror close to you.
7. Community Involvement
As a CentOS user there are various ways you can help out with the CentOS community. Take a look at our Contribute page for further information on how to get involved.
7.1. CentOS LiveCD project
The CentOS LiveCD project is where the development of the CentOS LiveCD takes place. Various topics are covered:
- Getting the LiveCD creation toolset
- Creating a LiveCD image
- Transfering a LiveCD image to a Flash drive
- Boot a LiveCD image through PXE
- Customizing your own LiveCD
7.2. Mailing lists and Fora
We thank everyone involved for helping us produce this product.
Copyright (C) 2010 The CentOS Project