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FAQ
,answers are better indented
== General ==
===== What is a Virtual Environment (Virtual Private Server, VPS, VE)? =====
:See [[VE]]
===== Who needs OpenVZ? How it can be used? =====
:See [[Use cases]]
===== How is OpenVZ different from other technologies? =====
:See [[Introduction to virtualization]]
===== How is OpenVZ updated and why it is secure? =====
:See [[Security]]
===== I want to show my appreciation to OpenVZ and put some logo to my site. Where to get it? =====
:See [[Artwork]]
== Installation and upgrade ==
===== What hardware is supported by OpenVZ kernel? =====
:See [http://www.virtuozzo.com/en/products/virtuozzo/hcl/ Virtuozzo HCL].
===== Why there are different kernel flavours available and what do they mean? =====
:See [[Different kernel flavors (UP, SMP, ENTERPRISE, ENTNOSPLIT)]]
===== How do I rebuild the kernel? =====
:See [[Kernel build]]
===== What does 021stab018 in OpenVZ kernel version mean? =====
:See [[Kernel versioning]]
===== How can I check package signatures? =====
:See [[Package signatures]]
===== Is it possible to run x86 VPS on a x86_64 arch? =====
:Sure :) We actually did some work on that to enable migration of x86 VE from x86 to x86_64 and back, and to enable using 32-bit iptables in 32bit VE on an x86_64 system.
== Networking ==
===== How do I set up VPN for a VE? =====
:See [[VPN via the TUN/TAP device]]
===== What is veth and how do I use it? =====
:See [[Virtual Ethernet device]]
== User Beancounters ==
===== How can I reset <code>failcnt</code> in <code>/proc/user_beancounters</code>? =====
:In short — only by stopping and starting a VE. In some cases you need to keep VE in a stopped state for a few minutes.
:Long answer: there can be many application who reads /proc/user_beancounters, and thus if you will reset it you gonna have problems with those other apps.:Consider what happens if you will reset you sent/received packets/bytes statistics on the network interface — programs which reads will be screwed up.:So the proper thing to watch for is not the current value of, say, failcnt, but whether it is increased (from the previous reading) or not. You can write a simple shell script to do just that.
== Troubleshooting ==
===== My kernel crashed. What should I do? =====
:See [[When you have an oops]]
===== I see a lot of processes in D state. What does that mean? =====
: See [[Processes in D state]]
