= lxc =
Linux Containers

 * [[https://linuxcontainers.org/lxc/introduction/]]
 * [[http://www.cyberciti.biz/faq/how-to-create-unprivileged-linux-containers-on-ubuntu-linux/]]
 * [[http://en.wikipedia.org/wiki/LXC]]

LXC (Linux Containers) is an operating system–level virtualization method for running multiple isolated Linux systems (containers) on a single control host.

LXC provides operating system-level virtualization through a virtual environment that has its own process and network space, instead of creating a full-fledged virtual machine. 

== Ubuntu precise i386 container on Slackware 14.2 ==
{{{#!highlight bash
2016-11-08T23:39 root@nb200:/tmp
$ lxc-create -t download -n containerx -- -d ubuntu  -r precise -a i386
Setting up the GPG keyring
Downloading the image index
Downloading the rootfs
Downloading the metadata
The image cache is now ready
Unpacking the rootfs

---
You just created an Ubuntu container (release=precise, arch=i386, variant=default)

To enable sshd, run: apt-get install openssh-server

For security reason, container images ship without user accounts
and without a root password.

Use lxc-attach or chroot directly into the rootfs to set a root password
or create user accounts.
# start a container
lxc-start -n containerx -d
# list containers
lxc-ls --fancy
# spawn a new shell running inside an existing container
lxc-attach -n containerx

# session in containerx 
root@containerx:/etc# cat /etc/os-release 
NAME="Ubuntu"
VERSION="12.04.5 LTS, Precise Pangolin"
ID=ubuntu
ID_LIKE=debian
PRETTY_NAME="Ubuntu precise (12.04.5 LTS)"
VERSION_ID="12.04"

# run several commands in the container
lxc-attach -n containerx -- sh -c 'TESTFILE=/tmp/asd;cat $TESTFILE; echo $TESTFILE'
lxc-attach -n containerx -- sh -c 'cat /etc/os-release; dpkg -l;'
# containers are stored under  /var/lib/lxc/

}}}

== Containers in Slackware64 15.0 ==
{{{#!highlight bash
su
# list available templates and distros
lxc-create -t download -n NAME
#Setting up the GPG keyring
#Downloading the image index
#
#---
#DIST	RELEASE	ARCH	VARIANT	BUILD
#---
#almalinux	8	amd64	default	20220224_23:09
#almalinux	8	arm64	default	20220224_23:09
#alpine	3.12	amd64	default	20220225_13:00
#alpine	3.12	arm64	default	20220225_13:01
#alpine	3.12	armhf	default	20220225_13:00
#alpine	3.12	i386	default	20220225_13:01
# press ctrl+c to exit
lxc-create -t download -n containery -- -d ubuntu  -r bionic -a i386
lxc-start -n containery -d
lxc-ls --fancy
lxc-attach -n containery
# in the container
lsb_release -a
}}}