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How to install nsenter on Ubuntu 14.04
# Ubuntu 14.04 don't have nsenter - the straight forward way required me to install build tools and etc.
# I preferred to keep the system clean and install nsenter in a container and then copy the command to the host
# Note - its also possible to run nsenter from a container (didn't tried)
# start a container
docker run --name nsenter -it ubuntu:14.04 bash
## in the docker
apt-get update
apt-get install git build-essential libncurses5-dev libslang2-dev gettext zlib1g-dev libselinux1-dev debhelper lsb-release pkg-config po-debconf autoconf automake autopoint libtool
git clone git:// util-linux
cd util-linux/
./configure --without-python --disable-all-programs --enable-nsenter
## from different shell - on the host
sudo docker cp nsenter:/util-linux/nsenter /usr/local/bin/
sudo docker cp nsenter:/util-linux/bash-completion/nsenter /etc/bash_completion.d/nsenter
## Start another terminal from host (Or another) machine:
PID=$(docker inspect --format {{.State.Pid}} 04fe75de21d4)
sudo nsenter --target $PID --mount --uts --ipc --net --pid
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