1. Obtain the installer script

   Download the installer script:

   # wget https://autoinstall.plesk.com/plesk-installer
   

   Enable execution mode for the downloaded installer script:

   # chmod +x ./plesk-installer
   

2. Launch the installer with necessary options

   To upgrade Plesk without requiring any user input, run the installer
   script providing all the necessary information through the
   corresponding options:

   # sh ./plesk-installer upgrade <RELEASE> <OPTIONS>
   

The following parameters are used to define the specific Plesk release
you wish to install.

To view the available installer commands, run:

# ./plesk-installer help

To view information on the extended option-based interface, run:

# ./plesk-installer --help-options

Example 1: Upgrading Plesk from default updates server

The following command performs the upgrade to the Plesk 17.0.17 release
version (ID is PLESK_17_0_17) from the Plesk updates server. All
Installer’s output is redirected to an XML file.

# ./plesk-installer upgrade PANEL_17_0_17 --xml

Example 2: Upgrading Plesk from a mirror

The following command upgrades Plesk to the 17.0.17 release version (ID
is ‘PLESK_17_0_17’) from the mirror set up on the server
‘mirror.example.com’ available via HTTP. Upgrade files will temporarily
be stored at ‘/tmp/panel’, and the upgrade status will be reported to
the email ‘admin@example.com’.

# ./plesk-installer upgrade PLESK_17_0_17 
    --source http://mirror.example.com/ 
    --target /tmp/panel 
    --email [email protected]

Example 3: Upgrading Plesk to the latest version on a number of servers

This script upgrades Plesk installed on the specified servers to the
latest available version.

#!/bin/sh
SERVERS_LIST="node1.example.com node2.example.com"
for current_server in $SERVERS_LIST; do
    ssh -f root@$current_server 'plesk installer 
         --select-release-latest 
         --upgrade-installed-components 
         --notify-email [email protected]'
done