Articles in the Kernel Category
Featured, Headline, Kernel, Linux, Tuning »
I think, everyone from Linux industry, knows about kexec (fast rebooting … actually not rebooting just switching kernels) or Pannus (live kernel patching, but right now the project is dead) and their use. The Linux community started very earlier to think at a method to switch or patch a live kernel, but this things should work only on a very good kernel with very good memory and process isolation … but this was achieved some time ago, we have a very good and mature Linux kernel (in my opinion was perfect from 2.4.2x) what can run for years without a reboot (my record is 4 years on a system with kernel 2.6.8 and this kernel is far to be perfect). This days I found a tool what is a gold mine for system administrators : KSplice.
Debian, Hacking, How-to, Kernel, Linux, Newbie, Recovery, Security, Ubuntu »
When we auditing a Linux system we have a lot of good tools to monitor unexpected changes and unexpected behaviour of a system. Earlier we talked about rkhunter as a system check for rootkits and now, as an alternative, we will talk about chkrootkit (Determine whether the system is infected with a rootkit).
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Debian, How-to, Kernel, Linux, Newbie, Recovery, Tuning »
By default, a Linux, is waiting direct input of a person / sysadmin when is crashing with kernel panic/oops. Obviously is very important to know or to see directly the dumped screen, but sometimes in production environments is better just to reboot itself without any intervention and debug the problem with the system online. Off course for debugging and seeing the dump you will need to install and configure kdump, but that is another story (I will probably write about that soon).
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Bugs, Kernel, Linux, Ubuntu, vmware »
I just upgraded to Ubuntu 9.04 with kernel 2.6.27-10-generic. After upgrade I wanted to reconfigure my old VMware player 2.4.x but no success because the kernel was changed a lot from version 2.6.18 to 2.6.27, so I was “forced” to switch to VMWare Player 2.5.1.
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