run program in new namespaces NAME unshare - run program in new namespaces SYNOPSIS unshare [options] [ program [ arguments ]] DESCR...disassociate parts of the process execution context NAME unshare - disassociate parts of the process execution context LIBRARY Standard C library ( libc ,......flag on the specified file descriptors, rather than immediately closing them. CLOSE_RANGE_UNSHARE Unshare the specified file descriptors from any other processes before closing …...non-root users it may return incomplete information. The current /proc filesystem may be unshared and affected by a PID namespace (see unshare --mount-proc for more details). ls…...es in other UTS namespaces. When a process creates a new UTS namespace using clone (2) or unshare (2) with the CLONE_NEWUTS flag, the hostname and domain name of the new UTS nam….../proc/ pid /cgroup file. When a process creates a new cgroup namespace using clone (2) or unshare (2) with the CLONE_NEWCGROUP flag, its current cgroups directories become the c…...e (2) with the CLONE_NEWPID flag, or the first child created by a process after a call to unshare (2) using the CLONE_NEWPID flag) has the PID 1, and is the "init" process for t…...ied via a file descriptor that refers to one of the /proc/ pid /ns files described below. unshare (2) The unshare (2) system call moves the calling process to a new namespace. I…...(2), and /proc/uptime . Currently, the only way to create a time namespace is by calling unshare (2) with the CLONE_NEWTIME flag. This call creates a new time namespace but does…...the same view in these files.) A new mount namespace is created using either clone (2) or unshare (2) with the CLONE_NEWNS flag. When a new mount namespace is created, its mount…...requires a kernel that is configured with the CONFIG_IPC_NS option. SEE ALSO nsenter (1), unshare (1), clone (2), setns (2), unshare (2), mq_overview (7), namespaces (7), sysvip…...espace is the user namespace of the process that creates the user namespace via a call to unshare (2) or clone (2) with the CLONE_NEWUSER flag. The kernel imposes (since Linux 3…...s, the return value is one of the CLONE_NEW* values that can be specified to clone (2) or unshare (2) in order to create a namespace. On error, -1 is returned, and errno is set …...requires a kernel that is configured with the CONFIG_NET_NS option. SEE ALSO nsenter (1), unshare (1), clone (2), veth (4), proc (5), sysfs (5), namespaces (7), user_namespaces …...espaces, and show that the new UTS namespace is associated with the new user namespace: $ unshare -Uu sleep 1000 & [1] 23235 $ ./ns_show /proc/23235/ns/uts u Device/Inode of own…...espaces, and show that the new UTS namespace is associated with the new user namespace: $ unshare -Uu sleep 1000 & [1] 23235 $ ./ns_show /proc/23235/ns/uts u Device/Inode of own…...new user and mount namespaces, and in that shell we create some new mounts: $ PS1='sh1# ' unshare -Urnm sh1# mount -t tmpfs tmpfs /etc # Mount empty tmpfs at /etc sh1# mount --b…...n-write operation requires the allocation of new storage, the fallocate (2) operation may unshare shared blocks to guarantee that subsequent writes will not fail because of lack…...n-write operation requires the allocation of new storage, the fallocate (2) operation may unshare shared blocks to guarantee that subsequent writes will not fail because of lack…...n-write operation requires the allocation of new storage, the fallocate (2) operation may unshare shared blocks to guarantee that subsequent writes will not fail because of lack…