HP 1920 switches (and others of the same kind) have a CLI mode which is highly restricted. It is possible to unlock this, providing full access to the configuration of the switch through CLI.
Log on to the CLI (SSH or Telnet) with the admin user and the password (default: none).
Type and press Enter:
_cmdline-mode on All commands can be displayed and executed. Continue? [Y/N]
Press Y to confirm.
Please input password:
Enter the password. This is a firmware-set password and is not user-defined. Depending on the firmware, try one of these:
If successful, you can now run all commands.
You can easily update your vCenter Server Appliance (VCSA) offline by downloading a product patch ISO and via the CLI.
Download the latest patch from VMware Patch Download Center. Select VC from the Search by Product drop-down menu, then select the correct version (i.e. 6.0 or 6.5). Download the patch ISO and attach it to the VCSA.
Log in to the shell (using SSH or VMRC) and initiate the update:
software-packages stage --iso
software-packages list --staged
software-packages install --staged
After the update has finished, you will have to reboot the VCSA.
You can use either esxcli or vicfg-hostops to enter/exit maintenance mode.
Note that you can use vicfg-hostops --operation info to check whether the host is finished with entering maintenance mode or is still busy.
After connecting to the host or vCenter server: