LXC : Install2026/04/17

Install the container-based virtualization software LXC (Linux Containers).

Because it uses paravirtualization, which shares the host and kernel, other operating systems like Windows cannot be used.

[1]

Install LXC.

# install from EPEL

[root@dlp ~]#

dnf --enablerepo=epel -y install lxc lxc-templates

[2]	Configure Bridge networking for Containers. Replace the interface name [enp1s0] for your own environment.

# add bridge [lxcbr0]

[root@dlp ~]#

nmcli connection add type bridge autoconnect yes con-name lxcbr0 ifname lxcbr0

Connection 'br0' (ced3dbca-7cc3-41bd-a42c-86857ecd1f7f) successfully added.

# set IP address for [lxcbr0]

[root@dlp ~]#

nmcli connection modify lxcbr0 ipv4.addresses 10.0.0.30/24 ipv4.method manual

# set Gateway for [lxcbr0]

[root@dlp ~]#

nmcli connection modify lxcbr0 ipv4.gateway 10.0.0.1

# set DNS for [lxcbr0]

[root@dlp ~]#

nmcli connection modify lxcbr0 ipv4.dns 10.0.0.10

# set DNS search base for [lxcbr0]

[root@dlp ~]#

nmcli connection modify lxcbr0 ipv4.dns-search srv.world

# remove the current interface

[root@dlp ~]#

nmcli connection del enp1s0

# add the removed interface again as a member of [lxcbr0]

[root@dlp ~]#

nmcli connection add type bridge-slave autoconnect yes con-name enp1s0 ifname enp1s0 master lxcbr0

[root@dlp ~]#

reboot

[root@dlp ~]#

ip addr show lxcbr0

4: lxcbr0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc noqueue state UP group default qlen 1000
    link/ether 52:54:00:7e:d7:d1 brd ff:ff:ff:ff:ff:ff
    inet 10.0.0.30/24 brd 10.0.0.255 scope global noprefixroute lxcbr0
       valid_lft forever preferred_lft forever
    inet6 fe80::1b1e:cfb7:f4d7:aff6/64 scope link noprefixroute
       valid_lft forever preferred_lft forever

[3]	As an example, we will create a CentOS Trixie container. Various other OS templates are available besides CentOS, which can be viewed at the following URL. ⇒ https://images.linuxcontainers.org/

# create [centos9] container

[root@dlp ~]#

lxc-create --name centos9 --template download -- --dist centos --release 10-Stream --arch amd64

Downloading the image index
Downloading the rootfs
Downloading the metadata
The image cache is now ready
Unpacking the rootfs

---
You just created a Centos 10-Stream x86_64 (20260416_07:08) container.

# list containers

[root@dlp ~]#

lxc-ls

centos9

# display container information

[root@dlp ~]#

lxc-info -n centos9

Name:           centos9
State:          STOPPED

# start containers as daemons

[root@dlp ~]#

lxc-start -n centos9 -d

[root@dlp ~]#

lxc-info -n centos9

Name:           centos9
State:          RUNNING
PID:            2416
Link:           vethTQDwGw
 TX bytes:      1.43 KiB
 RX bytes:      852 bytes
 Total bytes:   2.27 KiB

# Connect to the container

[root@dlp ~]#

lxc-attach -n centos9

[root@centos9 ~]#     # connected to the container's shell

# to return to the host console, press [Ctrl + d]

[root@centos9 ~]#
exit
[root@dlp ~]#

# To stop the container, do the following

[root@dlp ~]#

lxc-stop -n centos9

[4]	Here are some other basic operating instructions.

# container you created is saved in the following location

[root@dlp ~]#

ll /var/lib/lxc

total 0
drwxrwx---. 3 root root 34 Apr 17 08:45 centos9

# for example, create a container on [ubuntu2404]

[root@dlp ~]#

lxc-create --name ubuntu2404 --template download -- --dist ubuntu --release noble --arch amd64

[root@dlp ~]#

lxc-start -n ubuntu2404 -d

# run a specific command and display the results on the host console

[root@dlp ~]#

lxc-attach -n ubuntu2404 -- /bin/echo "Welcome to the LXC World!"

Welcome to the LXC World!

# delete a container

[root@dlp ~]#

lxc-stop -n ubuntu2404

[root@dlp ~]#

lxc-destroy -n ubuntu2404

[root@dlp ~]#

lxc-ls

centos9

# take a snapshot of a container

[root@dlp ~]#

lxc-snapshot -n centos9

lxc-snapshot: centos9: ../src/lxc/lxccontainer.c: do_lxcapi_snapshot: 4129 Snapshot of directory-backed container requested
lxc-snapshot: centos9: ../src/lxc/lxccontainer.c: do_lxcapi_snapshot: 4130 Making a copy-clone.  If you do want snapshots, then
lxc-snapshot: centos9: ../src/lxc/lxccontainer.c: do_lxcapi_snapshot: 4131 please create overlay clone first, snapshot that
lxc-snapshot: centos9: ../src/lxc/lxccontainer.c: do_lxcapi_snapshot: 4132 and keep the original container pristine

[root@dlp ~]#

lxc-snapshot -n centos9 --list

snap0 (/var/lib/lxc/centos9/snaps) 2026:04:17 09:09:52

# restore from snapshot

[root@dlp ~]#

lxc-snapshot -n centos9 -r snap0

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