Docker

sudo usermod -aG docker $USER newgrp docker mkdir "$HOME/.docker" sudo chown "$USER":"$USER" "$HOME/.docker" -R sudo chmod g+rwx "$HOME/.docker" -R sudo systemctl daemon-reload sudo systemctl restart docker.service

Windows 10 Home

Windows 10 Home
# powershell dism.exe /online /enable-feature /featurename:Microsoft-Windows-Subsystem-Linux /all /norestart dism.exe /online /enable-feature /featurename:VirtualMachinePlatform /all /norestart wsl --set-default-version 2
# powershell docker pull hello-world docker run -it --rm --name hello hello-world:latest	# gitbash winpty docker pull hello-world winpty docker run -it --rm --name hello hello-world:latest

Networking

Networking
cat <<'EOF' | \ sudo tee /etc/docker/daemon.json >/dev/null { "bip" : "10.20.13.1/24", "mtu" : 1500, "dns" : [ "1.1.1.1", "8.8.8.8", "192.168.49.2" ], "debug": true } EOF	cat << EOF | \ sudo tee /etc/docker/daemon.json >/dev/null { "mtu" : 1500, "debug" : true, "experimental": false, "default-address-pools" :[{ "base" : "10.20.0.0/16", "size" : 24 }] } EOF
apt install -y iputils iptables -t nat -S service docker stop service docker start docker run --rm --detach --publish 1983:80 nginx docker run --rm --detach --net=host nginx docker run --rm --detach --publish 1983:80 --net=ckn.b00 --ip 10.20.15.10 nginx docker run --rm --detach --publish 1983:80 --net=ckn.b01 --ip 10.20.16.10 nginx

Bridge

Bridge
docker network create \ --driver bridge \ --gateway 10.20.15.1 \ --subnet 10.20.15.0/24 \ --opt com.docker.network.driver.mtu=1500 \ --opt com.docker.network.bridge.enable_icc=true \ --opt com.docker.network.bridge.enable_ip_masquerade=true \ --opt com.docker.network.bridge.host_binding_ipv4=0.0.0.0 \ --opt com.docker.network.bridge.name=ckn.b00 ckn.b00

MAC VLAN

MAC VLAN
Bridge mode docker network create \ --driver macvlan \ --gateway 10.20.20.1 \ --subnet 10.20.20.0/24 \ --opt parent=wlan0 ckn.v00
802.1q trunk bridge mode docker network create \ --driver macvlan \ --gateway 10.20.20.1 \ --subnet 10.20.20.0/24 \ --ip-range 10.20.20.240/28 \ --opt parent=wlan0.01 ckn.v01
docker network inspect ckn.v00 docker network connect ckn.v00 nginx
docker exec -it nginx ls -lah /sys/class/net/ docker exec -it nginx cat /etc/resolv.conf docker inspect nginx|grep "IPAddress" docker exec -it nginx cat /etc/hosts curl -v http://10.20.20.240:1983 curl -v http://localhost:1983 curl -v http://10.20.20.240
docker network disconnect bridge nginx docker network disconnect ckn.v00 nginx

IP VLAN

IP VLAN
docker network create -d ipvlan \ --subnet=10.20.1.0/24 \ --subnet=10.20.2.0/24 \ --gateway=10.20.1.254 \ --gateway=10.20.2.254 \ --opt ipvlan_mode=l2 ckn.i00

Cache or Mirror

Cache or Mirro
mkdir -p /etc/docker/registry cat <<EOF > /etc/docker/registry/config.yml --- proxy: remoteurl: https://hub.chorke.org username: academia password: sadaqah! EOF

Add Tag & Push

Add Tag & Push
RFIND_FILL="s|docker.chorke.com|docker.chorke.org|";\ OLD_IMAGES="$(docker images --format 'table {{.Repository}}:{{.Tag}}'|grep chorke)";\ for OLD_IMAGE in ${OLD_IMAGES};do\ NEW_IMAGE="$(echo ${OLD_IMAGE}|sed ${RFIND_FILL})";\ docker tag ${OLD_IMAGE} ${NEW_IMAGE} &&\ docker push ${NEW_IMAGE} &&\ docker rmi ${NEW_IMAGE} &&\ docker rmi ${OLD_IMAGE};\ done

Troubleshoot

Troubleshoot
docker run --rm --net=host busybox nslookup google.com docker run --rm --net=host alpine cat /etc/resolv.conf docker run --rm --net=host alpine nslookup google.com docker run --rm --net=host alpine ping google.com docker run --rm --net=host alpine cat /etc/hosts docker run --rm --net=host alpine ifconfig docker run --rm --net=host alpine ip addr docker run --rm --net=host alpine route	docker run --rm busybox nslookup google.com docker run --rm alpine cat /etc/resolv.conf docker run --rm alpine nslookup google.com docker run --rm alpine ping google.com docker run --rm alpine cat /etc/hosts docker run --rm alpine ifconfig docker run --rm alpine ip addr docker run --rm alpine route
docker run --add-host=host.docker.internal:host-gateway\ -it --rm alpine ping host.docker.internal	docker run --add-host=host.docker.internal:host-gateway\ -it --rm alpine sh
docker inspect crawler|grep compose docker logs crawler docker logs -f crawler
export DOCKER_OPTS="--dns 8.8.8.8 --dns 8.8.4.4 --iptables=false --ip-forward=false" firewall-cmd --permanent --zone=trusted --change-interface=docker0 firewall-cmd --reload systemctl restart docker
systemctl stop docker rm -fr /var/lib/docker rm -fr /etc/docker pkill docker	iptables -t nat -F ifconfig docker0 down brctl delbr docker0 systemctl start docker
vim /etc/selinux/config shutdown -r now setenforce 0 sestatus	#devil most things for docker0 bridge sudo apt remove netscript-2.4 sudo apt purge netscript-2.4 sudo apt autoremove

Ryzen AMD-V

Ryzen AMD-V
Yes, AMD Ryzen 9 3900x supports virtualization. Almost every processors released since a long time have Virtualization. For Windows it's Vt-x or SVM(in some AMD motherboard vtx is renamed as SVM).

Images Path

Images Path
Ubuntu: /var/lib/docker/ Fedora: /var/lib/docker/ Debian: /var/lib/docker/ Windows: C:\ProgramData\DockerDesktop MacOS: ~/Library/Containers/com.docker.docker/Data/vms/0/

Backup & Restore

Backup & Restore
docker pull gitea/gitea:1.10.6 docker pull gitea/gitea:1.16.2 docker image load -i ~/.config/backup/gitea_gitea_1.10.6.tar docker image load -i ~/.config/backup/gitea_gitea_1.16.2.tar docker image save -o ~/.config/backup/gitea_gitea_1.10.6.tar gitea/gitea:1.10.6 docker image save -o ~/.config/backup/gitea_gitea_1.16.2.tar gitea/gitea:1.16.2

Reclaim Disk Space

Reclaim Disk Space

cat <<'EXE' | sudo bash sh -c 'du -sh /var/lib/docker/containers/*' sh -c 'truncate -s 0 /var/lib/docker/containers/*/*-json.log' 2>/dev/null docker images -f 'dangling=true' -q docker rmi $(docker images -f 'dangling=true' -q) 2>/dev/null docker system prune -f --volumes docker builder prune -f -a docker network prune -f docker volume prune -f apt-get clean apt-get autoclean apt-get autoremove -y journalctl --disk-usage journalctl --vacuum-time=90d find /tmp -type f -mtime +7 find /tmp -type f -mtime +7 -delete find /var/log/nginx -type f -mtime +90 find /var/log/nginx -type f -mtime +90 -delete EXE

Custom Docker Image

Custom Docker Image
cat <<'INI' | tee ./Dockerfile >/dev/null FROM eclipse-temurin:17-jre-focal RUN apt update --fix-missing \ && apt install -y nginx apache2-utils INI docker build --rm -t 'docker.shahed.biz/tools/eclipse-temurin:17-jre-focal' -f ./Dockerfile . docker push docker.shahed.biz/tools/eclipse-temurin:17-jre-focal

Recovery Parent Image

Recovery Parent Image

docker pull docker.shahed.biz/shahed-academia-apps:2025-10-10T1010 docker history docker.shahed.biz/shahed-academia-apps:2025-10-10T1010 docker inspect docker.shahed.biz/shahed-academia-apps:2025-10-10T1010 | jq '.[0].RootFS.Layers' docker run -it --name recovery-openjdk-17-slim docker.shahed.biz/shahed-academia-apps:2025-10-10T1010 bash # executing bash command try to clean up new changes and then commit as below docker commit recovery-openjdk-17-slim openjdk:17-slim docker run --rm \ -v /var/run/docker.sock:/var/run/docker.sock \ alpine/dfimage:1.2 docker.shahed.biz/shahed-academia-apps:2025-10-10T1010 docker run --rm -it \ -v /var/run/docker.sock:/var/run/docker.sock \ wagoodman/dive:v0.13.1 docker.shahed.biz/shahed-academia-apps:2025-10-10T1010 docker rmi docker.shahed.biz/shahed-academia-apps:2025-10-10T1010 docker rm recovery-openjdk-17-slim docker rmi wagoodman/dive:v0.13.1 docker rmi alpine/dfimage:1.2

Knowledge

Knowledge
docker network ls docker network prune docker network rm ckn.b00 ckn.b01 docker inspect nginx|grep compose docker inspect nginx|grep "IPAddress" docker network inspect bridge|grep "Gateway"
docker rm $(docker ps -a -q) docker stop $(docker ps -a -q)	docker inspect nginx docker update --restart=no nginx
docker run --rm -dit --network \ none --name alpine alpine:latest ash;\ docker exec -it alpine ip link show
docker network create --driver bridge \ --opt com.docker.network.bridge.name=ckn.b00 ckn.b00
docker network connect ckn.b00 nginx docker exec -it nginx cat /etc/hosts docker inspect nginx|grep "IPAddress" docker exec -it nginx cat /etc/resolv.conf docker exec -it nginx ls -lah /sys/class/net/ docker run --add-host=host.docker.internal:host-gateway\ --rm alpine ping host.docker.internal
docker cp ~/.m2/settings.xml alpine:/root/.m2/settings.xml docker cp alpine:/root/.m2/settings.xml ~/.m2/settings.xml
docker network disconnect bridge nginx docker network disconnect ckn.b00 nginx docker exec -it nginx ls -lah /sys/class/net/
docker run -itd --network=ckn.b00 nginx docker network disconnect ckn.b00 nginx docker network connect --alias db --alias mysql ckn.b00 mysql
docker inspect -f '{{.Name}} - {{.NetworkSettings.IPAddress }}' $(docker ps -aq) docker ps --filter volume=remote-volume --format "table {{.ID}}\t{{.Mounts}}" docker ps --filter volume=/data --format "table {{.ID}}\t{{.Mounts}}" docker ps --format "table {{.ID}}\t{{.Labels}}" docker ps --format '{{.Names}}\t{{.Image}}' docker ps --format "{{.ID}}: {{.Command}}" docker ps --filter publish=80/udp