File: //usr/share/doc/slirp4netns/README.Debian
slirp4netns for Debian
---------------------
On Debian 9 (stretch) system, access to user namespaces is restricted. In
order to use this package, the following command enables this for all users:
sysctl -w kernel.unprivileged_userns_clone=1
for a permanent solution:
echo 'kernel.unprivileged_userns_clone=1' > /etc/sysctl.d/00-local-userns.conf
service procps restart
For Debian 10 (buster) and later, this is no longer necessary.
-- Reinhard Tartler <siretart@tauware.de>, Wed, 26 Dec 2018 09:25:58 -0500