On 14.02.2018 04:54, Aleksa Sarai wrote:

It depends how old your kernel is and what distro you use. Arch Linux > disables user namespaces entirely, Debian requires that you set a
sysctl> to enable unprivileged user namespaces, and RHEL requires you to set> both a sysctl and a kernel boot-flag. Also check how old your kernel is> (unprivileged user namespace support was added in 3.8).
Just tried on a mainline kernel (4.15). Same problem:

root@alphabox:~ unshare -U -r
unshare: unshare(0x14000000): Invalid argument

root@alphabox:/proc/sys/user cat max_user_namespaces

Am I missing something ?


Enrico Weigelt, metux IT consult
Free software and Linux embedded engineering
i...@metux.net -- +49-151-27565287

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