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| .TH UTS_NAMESPACES 7 2019-11-19 "Linux" "Linux Programmer's Manual" |
| .SH NAME |
| uts_namespaces \- overview of Linux UTS namespaces |
| .SH DESCRIPTION |
| UTS namespaces provide isolation of two system identifiers: |
| the hostname and the NIS domain name. |
| These identifiers are set using |
| .BR sethostname (2) |
| and |
| .BR setdomainname (2), |
| and can be retrieved using |
| .BR uname (2), |
| .BR gethostname (2), |
| and |
| .BR getdomainname (2). |
| Changes made to these identifiers are visible to all other |
| processes in the same UTS namespace, |
| but are not visible to processes in other UTS namespaces. |
| .PP |
| .PP |
| When a process creates a new UTS namespace using |
| .BR clone (2) |
| or |
| .BR unshare (2) |
| with the |
| .BR CLONE_NEWUTS |
| flag, the hostname and domain of the new UTS namespace are copied |
| from the corresponding values in the caller's UTS namespace. |
| .PP |
| Use of UTS namespaces requires a kernel that is configured with the |
| .B CONFIG_UTS_NS |
| option. |
| .SH SEE ALSO |
| .BR nsenter (1), |
| .BR unshare (1), |
| .BR clone (2), |
| .BR getdomainname (2), |
| .BR gethostname (2), |
| .BR setns (2), |
| .BR uname (2), |
| .BR unshare (2), |
| .BR namespaces (7) |