Generally, all Linux distributions needs a scheduled reboot once to stay up to date with important kernel security updates. RHN (or other distro vendors) provides Linux kernel security updates. You can apply kernel updates using yum command or apt-get command line options. After each upgrade you need to reboot the server. Ksplice service allows you to skip reboot step and apply hotfixes to kernel without rebooting the server. In this post, I will cover a quick installation of Ksplice for RHEL 5.x and try to find out if service is worth every penny.
Recently, I noticed that the timeout values differ on CentOS v5.x and RHEL Linux 5.x guests on VMWare ESX4 and ESX3.5.
Updated freetype packages that fix various security issues are now available for CentOS / Red Hat Enterprise Linux 3, 4, 5 and 2.1 server software.
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Here is a little known secret that allows you to view the change log of a package. Using –changelog option you can find out if particular security bug is fixed or not. This is extremely useful option for production boxes. For example CVE-2007-1864 documents that php has serious buffer overflow in the bundled libxmlrpc library [...]
CentOS / Fedora Core / RHEL 5 uses yum for software management. Yum allows you to add a new repository as a source to install binary software. Understanding yum repository yum repository configured using /etc/yum.conf file. Additional configuration files are also read from the directories set by the reposdir option (default is /etc/yum.repos.d and /etc/yum/repos.d. [...]