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Langflow on Ubuntu 24.04 LTS — Support & Quick Start

Langflow on Ubuntu 24.04 LTS — Langflow is a visual builder for LLM applications: drag-and-drop chains, agents, and RAG pipelines on top of LangChain. Published by Derek Coleman & Associates Inc on the Azure Marketplace, deployed in your own Azure subscription.

Email support Product page Azure Marketplace listing

Fixed on image version 2026.916.1356 (published 2026-09-16)

First boot now waits up to 15 minutes for Langflow's slow first start (it needs about 3 minutes on a 4-vCPU VM) and verifies the generated sign-in against the running service before reporting done, on a fresh build of the current Langflow release.

If you deployed this VM before 2026-09-16, it came from the older image and is not changed by the new publication — redeploy from the current Marketplace version, or apply the one-time repair below:

  1. On a VM from an earlier image the credential file was still written correctly — first boot simply gave up waiting. Give Langflow several more minutes (`sudo journalctl -u langflow -f`), then sign in at http://<VM-IP>:7860/ as dcaadmin with the password in /var/lib/langflow/admin-password.

Image change: see the pull request.

Source: the Marketplace live version set for this offer, read from Partner Center on 2026-09-16. New deployments take the newest version by default.

At a glance

Application ports7860 (web UI)
Open in browserhttp://<VM-IP>:7860/
Admin credential filesudo cat /var/lib/langflow/admin-password
Sign in asdcaadmin
Service(s)langflow
Configuration/opt/langflow/ (venv + data in /opt/langflow/data/)
Logsjournalctl -u langflow -f
VersionLangflow 1.1.1 (Python 3.12 venv)
PlatformUbuntu 24.04 LTS

Quick start

  1. Deploy from the Azure Marketplace (Get It Now → Create), choosing your SSH key at the Administration step.
  2. Allow inbound SSH (22) for yourself plus the application port(s): 7860 (web UI) — restrict to your own IP where possible. The in-image firewall already allows them; only the Network Security Group (NSG) keeps them closed.
  3. Open http://<VM-IP>:7860/ and sign in as dcaadmin (see First login below).
  4. Add your model provider keys in Settings → Global Variables and build your first flow.

First login / credentials

This image generates its admin credential on the VM at first boot — nothing is pre-set. SSH into the VM with the username + key you chose at deploy, then print the generated credential:

ssh <your-username>@<VM-IP>
sudo cat /var/lib/langflow/admin-password

Sign in as dcaadmin.

  1. Print the credential file: LANGFLOW_SUPERUSER=dcaadmin and LANGFLOW_SUPERUSER_PASSWORD.
  2. Open http://<VM-IP>:7860/ and sign in as dcaadmin.
  3. Change the password in Settings and delete the file once stored securely.

Sign in as admin (unless noted), then change the password immediately. The file is root-only and can be deleted once the password is stored securely.

Still stuck?

Email support@dcassociatesgroup.com (response within 1 business day) or send a message via the contact form. Include the offer name, VM size, region, and any log output — sudo journalctl -u <service> -n 100 usually tells the story.