Cheatsheets
Quick reference guides for common commands and procedures. Click any command to copy it to your clipboard.
Systemd vs OpenRC
linuxService management commands for both init systems
Service Control
systemd OpenRC Description
systemctl start nginx rc-service nginx start Start a service systemctl stop nginx rc-service nginx stop Stop a service systemctl restart nginx rc-service nginx restart Restart a service systemctl status nginx rc-service nginx status Check status systemctl enable nginx rc-update add nginx default Enable at boot systemctl disable nginx rc-update del nginx default Disable at boot System Information
systemd OpenRC Description
systemctl list-units rc-status List running services systemctl list-unit-files rc-update show List all services journalctl -u nginx cat /var/log/nginx/*.log View service logs journalctl -f tail -f /var/log/messages Follow system logs Docker Essential Commands
dockerCommon Docker operations for containers, images, and networks
docker ps List running containers docker ps -a List all containers (including stopped) docker images List local images docker pull nginx:latest Pull an image from registry docker run -d --name web -p 80:80 nginx Run container in background with port mapping docker exec -it web /bin/bash Execute interactive shell in container docker logs -f web Follow container logs docker stop web && docker rm web Stop and remove container docker system prune -a Remove all unused data (images, containers, networks) docker network ls List networks docker network create mynet Create a network docker volume ls List volumes docker inspect web View detailed container info docker stats Live resource usage stats docker compose up -d Start compose stack in background docker compose down -v Stop and remove stack with volumes docker compose logs -f Follow compose stack logs docker compose pull Pull latest images for stack Kubernetes kubectl Commands
kubernetesEssential kubectl commands for cluster management
kubectl get pods List pods in current namespace kubectl get pods -A List pods in all namespaces kubectl get pods -o wide List pods with node info kubectl describe pod mypod Detailed pod information kubectl logs mypod -f Follow pod logs kubectl logs mypod -c mycontainer Logs from specific container kubectl exec -it mypod -- /bin/bash Interactive shell in pod kubectl apply -f manifest.yaml Apply configuration kubectl delete -f manifest.yaml Delete resources from file kubectl get svc List services kubectl get deploy List deployments kubectl get nodes List cluster nodes kubectl top pods Resource usage by pods kubectl top nodes Resource usage by nodes kubectl rollout restart deploy/myapp Restart deployment kubectl rollout status deploy/myapp Watch rollout progress kubectl scale deploy/myapp --replicas=3 Scale deployment kubectl port-forward svc/myapp 8080:80 Forward local port to service kubectl get events --sort-by=.lastTimestamp Recent cluster events kubectl config get-contexts List available contexts kubectl config use-context mycluster Switch context Git Workflow Commands
gitCommon Git operations for version control
git status Show working tree status git add . Stage all changes git commit -m 'message' Commit with message git push origin main Push to remote git pull --rebase Pull with rebase git fetch --all Fetch all remotes git branch -a List all branches git checkout -b feature/new Create and switch to branch git merge feature/new Merge branch into current git rebase main Rebase current branch onto main git log --oneline -10 Show last 10 commits (short) git log --graph --oneline Show commit graph git diff Show unstaged changes git diff --staged Show staged changes git stash Stash current changes git stash pop Apply and remove stash git reset --soft HEAD~1 Undo last commit, keep changes staged git reset --hard HEAD~1 Undo last commit, discard changes git cherry-pick abc123 Apply specific commit git remote -v List remotes with URLs SSH Quick Reference
networkingSSH connections, tunnels, and key management
ssh user@host Basic SSH connection ssh -p 2222 user@host Connect on non-standard port ssh -i ~/.ssh/mykey user@host Connect with specific key ssh -L 8080:localhost:80 user@host Local port forward ssh -R 8080:localhost:80 user@host Remote port forward ssh -D 1080 user@host SOCKS proxy ssh -J jump@bastion user@target Jump host / ProxyJump ssh-keygen -t ed25519 -C 'comment' Generate ED25519 key ssh-copy-id user@host Copy public key to host ssh-add ~/.ssh/mykey Add key to agent ssh-keyscan host >> ~/.ssh/known_hosts Add host key scp file.txt user@host:/path/ Copy file to remote scp user@host:/path/file.txt . Copy file from remote rsync -avz src/ user@host:/dest/ Sync directory to remote Network Debugging
networkingCommands for troubleshooting network issues
ip addr Show IP addresses ip route Show routing table ip link Show network interfaces ss -tulpn Show listening ports ss -s Socket statistics summary ping -c 4 host Ping host (4 packets) traceroute host Trace route to host mtr host Combined ping/traceroute dig domain.com DNS lookup dig @8.8.8.8 domain.com DNS lookup with specific server nslookup domain.com Simple DNS lookup curl -I https://example.com HTTP headers only curl -v https://example.com Verbose HTTP request wget -O- https://example.com Download to stdout nc -zv host 80 Test TCP port connectivity tcpdump -i eth0 port 80 Capture packets on port 80 iptables -L -n -v List firewall rules nft list ruleset List nftables rules ZFS Storage Commands
storageZFS pool and dataset management
zpool status Show pool health status zpool list List pools with capacity zpool import List importable pools zpool import -f tank Force import pool zpool export tank Export pool zpool scrub tank Start scrub zpool history tank Show pool history zfs list List datasets zfs list -t snapshot List snapshots zfs create tank/data Create dataset zfs snapshot tank/data@backup Create snapshot zfs rollback tank/data@backup Rollback to snapshot zfs destroy tank/data@backup Delete snapshot zfs send tank/data@snap | ssh host zfs recv tank/data Send snapshot to remote zfs get all tank/data Show all properties zfs set compression=lz4 tank/data Enable compression zfs set quota=100G tank/data Set quota Tailscale VPN Commands
networkingTailscale mesh VPN management
tailscale status Show connection status tailscale ip Show Tailscale IP tailscale ping hostname Ping via Tailscale tailscale up Connect to network tailscale down Disconnect from network tailscale up --ssh Enable Tailscale SSH tailscale up --advertise-routes=10.42.0.0/24 Advertise subnet tailscale up --accept-routes Accept advertised routes tailscale up --exit-node=hostname Use exit node tailscale netcheck Network connectivity check tailscale debug derp-map Show DERP relay servers tailscale file send file.txt hostname: Send file via Taildrop tailscale logout Log out and disconnect Disk & Filesystem Commands
storageDisk management and filesystem operations
lsblk List block devices lsblk -f List with filesystem info fdisk -l List partitions df -h Disk space usage du -sh /path Directory size du -sh * | sort -h Sorted directory sizes ncdu /path Interactive disk usage mount /dev/sdb1 /mnt Mount filesystem umount /mnt Unmount filesystem blkid Show UUIDs and labels mkfs.ext4 /dev/sdb1 Create ext4 filesystem e2fsck -f /dev/sdb1 Check ext4 filesystem tune2fs -l /dev/sdb1 Show ext4 superblock info smartctl -a /dev/sda SMART health data hdparm -tT /dev/sda Test disk speed fstrim -v / TRIM SSD Process Management
linuxProcess monitoring and control
ps aux List all processes ps aux | grep nginx Find specific process pgrep -a nginx Find process by name top Interactive process viewer htop Better interactive viewer kill PID Graceful kill (SIGTERM) kill -9 PID Force kill (SIGKILL) pkill nginx Kill by name killall nginx Kill all with name nice -n 10 command Run with lower priority renice -n 10 -p PID Change priority nohup command & Run immune to hangups command & Run in background jobs List background jobs fg %1 Bring job to foreground bg %1 Resume job in background