How to Enable Local or Remote Tech Support Mode TSM from the Direct Console User Interface (DCUI) on ESXi 4.1

Updated on August 22, 2017
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The Tech Support Mode or TSM is a sort of simple version of the system console that was available on the classic versions of ESX. Except that the TSM mode is not Linux based and does not have all the capabilities. But you can now access Tech Support Mode locally or via SSH if you follow the instructions below to enable them.

To enable local or remote TSM from the Direct Console User  Interface (DCUI):

  1. At the DCUI of the ESXi host, press F2 and provide credentials when prompted.
  2. Scroll to Troubleshooting Options, and press  Enter. Enable Local and Remote Tech Support Mode from DCUI on ESXi
  3. If you want to enable local TSM, select Local Tech  Support and press Enter once. This allows users to login on the  virtual console of the ESXi host.If you want to enable remote  TSM, select Remote Tech Support (SSH) and press Enter  once. This allows users to login via SSH on the virtual console of the  ESXi host. Enable Local and Remote Tech Support Mode from DCUI on ESXi
  4. Press Esc three times to return to the main DCUI screen.
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To access the local TSM:

  1. At the main DCUI screen, press ALT+F1 simultaneously. This opens a  virtual console window to the host.
  2. Provide credentials when prompted.Note:  When typing the password, characters are not displayed on the console.

To access the remote TSM:

  1. Open an SSH client.
  2. Specify the IP address or domain name of the ESX host.