sudo netplan try

Netplan Config Generator

Fill in the interface and addressing, and get valid Netplan YAML with correct indentation, plus netplan try, which rolls back automatically if you lose the connection.

Options
Netplan YAML
Apply safely

Use netplan try on remote machines

A wrong address or gateway on a server you reach over SSH locks you out. sudo netplan try applies the new configuration and waits 120 seconds for you to press Enter; if you cannot, because the connection died, it reverts on its own. Only use netplan apply once try has worked. YAML is indentation-sensitive and tabs are not allowed, so copy the output as is. Use routes with to: default instead of gateway4, which is deprecated.

Generate Netplan network configuration

This Netplan generator writes configuration for Ubuntu Server and Desktop: DHCP for IPv4 and IPv6, or static addresses in CIDR form with a default route, nameservers, and search domains. It can build a Linux bridge, the usual way to put virtual machines directly on your LAN, or a tagged VLAN interface on top of a physical NIC, and it lets you choose the systemd-networkd renderer for servers or NetworkManager for desktops. It prints the file path, the permissions Netplan expects, and the try, apply, and verify commands.

Netplan FAQ

Which file should I edit?

Netplan reads every .yaml file in /etc/netplan in name order, and later files override earlier ones. Cloud images often ship 50-cloud-init.yaml, which cloud-init may regenerate; either disable cloud-init networking or put your settings in a later file such as 60-static.yaml.

How do I find my interface name?

Run ip -brief link. Names like enp1s0 or ens3 are predictable names based on the hardware location; eth0 appears mostly in containers and some cloud images.

Why does netplan warn about permissions?

Netplan files can contain Wi-Fi passwords, so Netplan warns when they are readable by other users. Set them to 600 with sudo chmod 600 /etc/netplan/*.yaml.

networkd or NetworkManager?

Ubuntu Server uses systemd-networkd, which suits fixed configurations. Ubuntu Desktop uses NetworkManager so the desktop applet and Wi-Fi roaming work. Match what the machine already uses unless you have a reason to change.

More Linux command tools

Crontab Generator Build cron schedule expressions visually, with plain-English previews of when your job will run. tar Builder Compose tar archive and extract commands with the right compression flags, without memorizing xvzf incantations. systemd Unit Builder Generate systemd service files with restart policies, dependencies, and sandboxing options. chmod / chown Builder Work out permission octals and ownership commands with a visual rwx matrix. rsync Builder Build rsync sync and backup commands with delete safety, excludes, and SSH transport options. SSH Config Builder Generate ~/.ssh/config host blocks with keys, jump hosts, and connection keepalives. find Builder Compose find commands with type, name, time, and size filters, plus prune lists and safe actions. /etc/fstab Builder Build fstab mount lines with the right options, dump, and pass ordering for disks and network shares. OpenSSL CSR Builder Generate certificate signing request commands with subject fields and SAN entries filled in. journalctl Query Builder Compose systemd journal queries with unit, boot, priority, time-range, and grep filters. docker run Builder Build docker run commands with ports, volumes, env vars, and restart policies. Podman-compatible. ufw Rule Builder Build ufw firewall rules with allow/deny/limit actions, source restrictions, and comments. systemd Timer Builder Generate paired .timer and .service units with OnCalendar schedules, persistence, and randomised delay. WireGuard Config Generator Produce matching server and peer configs with AllowedIPs, DNS, keepalive, and NAT forwarding rules. Reverse Proxy Config Builder Write nginx or Caddy config for a self-hosted service, with TLS, WebSockets, and forwarded headers. Docker Compose Generator Build a docker-compose.yml with volumes, environment, ports, restart policy, and healthcheck. nftables Rule Builder Generate nftables rules and a stateful starter ruleset for the inet filter table. Samba and NFS Share Builder Create an smb.conf share block or an /etc/exports line, with the client mount commands. useradd / usermod Builder Build user creation and modification commands without accidentally wiping group membership. sed Command Builder Compose substitution, deletion, and insertion commands with safe in-place editing and backups. LVM Command Builder Get the full command sequence for creating, extending, and snapshotting logical volumes. restic / Borg Backup Builder Build init, backup, retention, and restore commands for restic or BorgBackup repositories. tcpdump Filter Builder Assemble BPF capture filters by host, port, and protocol, with rotation and Wireshark output. dd Bootable USB Builder Write an ISO to a USB drive, with the device identification and checksum checks to run first. ffmpeg Command Builder Convert, compress, trim, scale, and extract audio with the arguments in the right order. umask Calculator See what a umask produces for new files and directories, and where to set it persistently. GPG Command Builder Verify signed downloads, generate keys, and sign files or git commits without guessing flags. Subnet Calculator Work out network, broadcast, host range, and masks for any IPv4 or IPv6 CIDR block, and split networks into subnets. curl Command Builder Build curl requests with methods, headers, JSON or form bodies, uploads, auth, retries, and timeouts. ssh-keygen Builder Generate Ed25519, RSA, or FIDO2 security key SSH keys, then install them with ssh-copy-id. sudoers Rule Builder Write sudoers.d rules with run-as targets, NOPASSWD, and limited command lists, validated with visudo. logrotate Config Generator Generate /etc/logrotate.d files with rotation schedules, retention, compression, and postrotate reloads. Podman Quadlet Generator Turn a container into a systemd service with a Quadlet .container file, rootless or rootful. grep Command Builder Build recursive grep searches with regex modes, context lines, and include or exclude filters, plus the ripgrep equivalent.

View all tools →