Namespaces in Linux are heavily used by many applications, e.g. LXC, Docker and Openstack.Question: How to find all existing namespaces in a Linux system? The answer is quite difficult, because it’s easy to hide a namespace or more exactly make it difficult to find them. Exploring the system In the basic/default setup Ubuntu 12.04 and higher provide namespaces for ipc for IPC objects and POSIX message queues mnt for filesystem mountpoints net for network abstraction (VRF) pid to provide a separated, isolated process ID number space uts to isolate two system identifiers — nodename and domainname – to be used by uname These namespaces are shown for every process in the system. if you execute as rootls -lai /proc/1/nsShell you get the list of attached namespaces of the init process using PID=1. Even this process has attached namespaces. These are the default namespaces… Leggi tuttoLinux Name spaces