To upgrade Wialon Local from version 2304 to 2404, follow the steps below.

1. In version 2404, we are switching to a new system of launching the admin site (wlocal service): the pm2 component will be used instead of forever. To upgrade, perform the following actions on the server:

   npm -g install pm2
   service wlocal stop
   sed -i 's/forever/pm2/g' /etc/init.d/wlocal
   systemctl daemon-reload
   service wlocal start

2. Before upgrading Debian, you should retain the old versions of the python and libpython packages. For this purpose, run the following command:
   

   apt-mark hold python libpython2.7 

   
   

3. Stop Wialon Local.

4. Upgrade the operating system to Debian 12 Bookworm.
   

   If the error unknown directive "echo" in /etc/nginx/conf.d/lcm.conf:9 occurs after upgrading the nginx package, install an additional nginx-extras package:
   

   apt-get install nginx-extras

5. Start Wialon Local.
6. Install Wialon Local version 2404.