qemu:ubuntu-16.04-32 .../tests/main/interfaces-desktop# nsenter -m/run/snapd/ns/test-snapd-desktop.mnt
mesg: ttyname failed: No such file or directory
qemu:ubuntu-16.04-32 /# cat /proc/mounts 
/dev/sda1 /var/lib/snapd/hostfs ext4 rw,relatime,data=ordered 0 0
tmpfs /var/lib/snapd/hostfs/run tmpfs rw,nosuid,noexec,relatime,size=150672k,mode=755 0 0
tmpfs /var/lib/snapd/hostfs/run/lock tmpfs rw,nosuid,nodev,noexec,relatime,size=5120k 0 0
tmpfs /var/lib/snapd/hostfs/run/user/1000 tmpfs rw,nosuid,nodev,relatime,size=150672k,mode=700,uid=1000,gid=1000 0 0
tmpfs /var/lib/snapd/hostfs/run/snapd/ns tmpfs rw,nosuid,noexec,relatime,size=150672k,mode=755 0 0
/dev/loop0 /var/lib/snapd/hostfs/snap/core/3376 squashfs ro,nodev,relatime 0 0
/dev/sda1 /var/lib/snapd/hostfs/snap/test-snapd-desktop/x1 ext4 ro,relatime,data=ordered 0 0
/dev/loop0 / squashfs ro,nodev,relatime 0 0
udev /dev devtmpfs rw,nosuid,relatime,size=736680k,nr_inodes=112370,mode=755 0 0
devpts /dev/pts devpts rw,nosuid,noexec,relatime,gid=5,mode=620,ptmxmode=000 0 0
tmpfs /dev/shm tmpfs rw,nosuid,nodev 0 0
hugetlbfs /dev/hugepages hugetlbfs rw,relatime 0 0
mqueue /dev/mqueue mqueue rw,relatime 0 0
/dev/sda1 /etc ext4 rw,relatime,data=ordered 0 0
/dev/sda1 /home ext4 rw,relatime,data=ordered 0 0
/dev/sda1 /root ext4 rw,relatime,data=ordered 0 0
proc /proc proc rw,nosuid,nodev,noexec,relatime 0 0
systemd-1 /proc/sys/fs/binfmt_misc autofs rw,relatime,fd=27,pgrp=1,timeout=0,minproto=5,maxproto=5,direct 0 0
sysfs /sys sysfs rw,nosuid,nodev,noexec,relatime 0 0
securityfs /sys/kernel/security securityfs rw,nosuid,nodev,noexec,relatime 0 0
tmpfs /sys/fs/cgroup tmpfs ro,nosuid,nodev,noexec,mode=755 0 0
cgroup /sys/fs/cgroup/systemd cgroup rw,nosuid,nodev,noexec,relatime,xattr,release_agent=/lib/systemd/systemd-cgroups-agent,name=systemd 0 0
cgroup /sys/fs/cgroup/freezer cgroup rw,nosuid,nodev,noexec,relatime,freezer 0 0
cgroup /sys/fs/cgroup/cpuset cgroup rw,nosuid,nodev,noexec,relatime,cpuset 0 0
cgroup /sys/fs/cgroup/net_cls,net_prio cgroup rw,nosuid,nodev,noexec,relatime,net_cls,net_prio 0 0
cgroup /sys/fs/cgroup/devices cgroup rw,nosuid,nodev,noexec,relatime,devices 0 0
cgroup /sys/fs/cgroup/hugetlb cgroup rw,nosuid,nodev,noexec,relatime,hugetlb 0 0
cgroup /sys/fs/cgroup/pids cgroup rw,nosuid,nodev,noexec,relatime,pids 0 0
cgroup /sys/fs/cgroup/cpu,cpuacct cgroup rw,nosuid,nodev,noexec,relatime,cpu,cpuacct 0 0
cgroup /sys/fs/cgroup/memory cgroup rw,nosuid,nodev,noexec,relatime,memory 0 0
cgroup /sys/fs/cgroup/blkio cgroup rw,nosuid,nodev,noexec,relatime,blkio 0 0
cgroup /sys/fs/cgroup/perf_event cgroup rw,nosuid,nodev,noexec,relatime,perf_event 0 0
pstore /sys/fs/pstore pstore rw,nosuid,nodev,noexec,relatime 0 0
debugfs /sys/kernel/debug debugfs rw,relatime 0 0
fusectl /sys/fs/fuse/connections fusectl rw,relatime 0 0
/dev/sda1 /tmp ext4 rw,relatime,data=ordered 0 0
/dev/sda1 /var/snap ext4 rw,relatime,data=ordered 0 0
/dev/sda1 /var/lib/snapd ext4 rw,relatime,data=ordered 0 0
/dev/sda1 /var/tmp ext4 rw,relatime,data=ordered 0 0
tmpfs /run tmpfs rw,nosuid,noexec,relatime,size=150672k,mode=755 0 0
tmpfs /run/lock tmpfs rw,nosuid,nodev,noexec,relatime,size=5120k 0 0
tmpfs /run/user/1000 tmpfs rw,nosuid,nodev,relatime,size=150672k,mode=700,uid=1000,gid=1000 0 0
tmpfs /run/snapd/ns tmpfs rw,nosuid,noexec,relatime,size=150672k,mode=755 0 0
/dev/sda1 /lib/modules ext4 rw,relatime,data=ordered 0 0
/dev/sda1 /usr/src ext4 rw,relatime,data=ordered 0 0
/dev/sda1 /var/log ext4 rw,relatime,data=ordered 0 0
/dev/sda1 /media ext4 rw,relatime,data=ordered 0 0
tmpfs /run/netns tmpfs rw,nosuid,noexec,relatime,size=150672k,mode=755 0 0
/dev/loop0 /etc/alternatives squashfs ro,nodev,relatime 0 0
/dev/loop0 /etc/ssl squashfs ro,nodev,relatime 0 0
/dev/loop0 /etc/nsswitch.conf squashfs ro,nodev,relatime 0 0
/dev/sda1 /snap ext4 rw,relatime,data=ordered 0 0
/dev/loop0 /snap/core/3376 squashfs ro,nodev,relatime 0 0
/dev/sda1 /snap/test-snapd-desktop/x1 ext4 ro,relatime,data=ordered 0 0
/dev/sda1 /var/lib/snapd/hostfs ext4 rw,relatime,data=ordered 0 0
/dev/sda1 /tmp ext4 rw,relatime,data=ordered 0 0
devpts /dev/pts devpts rw,relatime,gid=5,mode=620,ptmxmode=666 0 0
devpts /dev/ptmx devpts rw,relatime,gid=5,mode=620,ptmxmode=666 0 0
none /var/lib tmpfs rw,nosuid,nodev,relatime 0 0
/dev/loop0 /var/lib/apparmor squashfs ro,nodev,relatime 0 0
/dev/loop0 /var/lib/classic squashfs ro,nodev,relatime 0 0
/dev/loop0 /var/lib/cloud squashfs ro,nodev,relatime 0 0
/dev/loop0 /var/lib/console-conf squashfs ro,nodev,relatime 0 0
/dev/loop0 /var/lib/dbus squashfs ro,nodev,relatime 0 0
/dev/loop0 /var/lib/dhcp squashfs ro,nodev,relatime 0 0
/dev/loop0 /var/lib/extrausers squashfs ro,nodev,relatime 0 0
/dev/loop0 /var/lib/initramfs-tools squashfs ro,nodev,relatime 0 0
/dev/loop0 /var/lib/initscripts squashfs ro,nodev,relatime 0 0
/dev/loop0 /var/lib/insserv squashfs ro,nodev,relatime 0 0
/dev/loop0 /var/lib/logrotate squashfs ro,nodev,relatime 0 0
/dev/loop0 /var/lib/machines squashfs ro,nodev,relatime 0 0
/dev/loop0 /var/lib/misc squashfs ro,nodev,relatime 0 0
/dev/loop0 /var/lib/pam squashfs ro,nodev,relatime 0 0
/dev/loop0 /var/lib/python squashfs ro,nodev,relatime 0 0
/dev/loop0 /var/lib/resolvconf squashfs ro,nodev,relatime 0 0
/dev/loop0 /var/lib/sudo squashfs ro,nodev,relatime 0 0
/dev/loop0 /var/lib/systemd squashfs ro,nodev,relatime 0 0
/dev/loop0 /var/lib/ubuntu-fan squashfs ro,nodev,relatime 0 0
/dev/loop0 /var/lib/ucf squashfs ro,nodev,relatime 0 0
/dev/loop0 /var/lib/update-rc.d squashfs ro,nodev,relatime 0 0
/dev/loop0 /var/lib/urandom squashfs ro,nodev,relatime 0 0
/dev/loop0 /var/lib/vim squashfs ro,nodev,relatime 0 0
/dev/loop0 /var/lib/waagent squashfs ro,nodev,relatime 0 0
/dev/sda1 /var/lib/lxd ext4 rw,relatime,data=ordered 0 0
/dev/sda1 /usr/local/share/fonts ext4 rw,relatime,data=ordered 0 0
/dev/sda1 /usr/share/fonts ext4 rw,relatime,data=ordered 0 0
/dev/sda1 /var/cache/fontconfig ext4 rw,relatime,data=ordered 0 0