How to SSH into your LXD container

Get a list of containers:

vagrant@ubuntu-bionic:~/.config/lxc$ lxc list
+---------------------+---------+------+------+------------+-----------+
|        NAME         |  STATE  | IPV4 | IPV6 |    TYPE    | SNAPSHOTS |
+---------------------+---------+------+------+------------+-----------+
| apache-web          | RUNNING |      |      | PERSISTENT | 0         |
+---------------------+---------+------+------+------------+-----------+
| first               | RUNNING |      |      | PERSISTENT | 0         |
+---------------------+---------+------+------+------------+-----------+
| last                | RUNNING |      |      | PERSISTENT | 0         |
+---------------------+---------+------+------+------------+-----------+
| rainbows-web-centos | RUNNING |      |      | PERSISTENT | 0         |
+---------------------+---------+------+------+------------+-----------+
| redis-app-db        | RUNNING |      |      | PERSISTENT | 0         |
+---------------------+---------+------+------+------------+-----------+
| second              | RUNNING |      |      | PERSISTENT | 0         |
+---------------------+---------+------+------+------------+-----------+
| third               | RUNNING |      |      | PERSISTENT | 0         |
+---------------------+---------+------+------+------------+-----------+

If you have not setup networking yet, you can open a shell in your container with:

lxc exec third -- /bin/bash

Then check the OS:

root@first:~# lsb_release -a
No LSB modules are available.
Distributor ID:	Ubuntu
Description:	Ubuntu 18.04.2 LTS
Release:	18.04
Codename:	bionic

Checking another:

lxc exec rainbows-web-centos -- /bin/bash

gets:

[root@rainbows-web-centos ~]# cat /etc/os-release
NAME="CentOS Linux"
VERSION="7 (Core)"
ID="centos"
ID_LIKE="rhel fedora"
VERSION_ID="7"
PRETTY_NAME="CentOS Linux 7 (Core)"
ANSI_COLOR="0;31"
CPE_NAME="cpe:/o:centos:centos:7"
HOME_URL="https://www.centos.org/"
BUG_REPORT_URL="https://bugs.centos.org/"

CENTOS_MANTISBT_PROJECT="CentOS-7"
CENTOS_MANTISBT_PROJECT_VERSION="7"
REDHAT_SUPPORT_PRODUCT="centos"
REDHAT_SUPPORT_PRODUCT_VERSION="7"