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 , Wed, 26 Dec 2018 09:25:58 -0500