OpenVZ is a container based virtualization technique for Linux. OpenVZ creates multiple secure, isolated Linux containers (otherwise known as VEs or VPSs) on a single physical server. Each container performs and executes exactly like a stand-alone server; a container can be rebooted independently and have root access, users, IP addresses, memory, processes, files, applications, system libraries and configuration files.
We already discussed about the basic command line operation for an OpenVZ node. Please see the documentation >> 15+ Commonly using OpenVZ commands and its usages << for more details. Here I am listing some useful OpenVz commands with example.
Here I explain a fix for the error “Resource temporarily unavailable” while switching user in OpenVZ based servers.
# su - Password: su: cannot set user id: Resource temporarily unavailable
Edit (add) or change the following values in /etc/security/limits.conf
# vi /etc/security/limits.conf ------------- * soft nproc 2047 * hard nproc 16384 * soft nofile 1024 * hard nofile 65536 -------------
It should be okay now!
Please try to switch now and let me know if you have any questions.