You could if you dont mind learning a bit linux commands buy a VPS and run the server there. Installing and managing the eco server is really easy with this tool https://linuxgsm.com/lgsm/ecoserver/
Otherwise if that is no option for you, most if not all gameserver hoster provide you a FTP connection to get the config files and edit them.
Edit: typo
Hands down the easiest way to have an ECO server running on Linux while still using a game manager is to install it using LinuxGSM (game server manager). The link below takes you to the setup instructions for Eco.
https://linuxgsm.com/lgsm/ecoserver/
Then you can find all the game files such as Network.eco in the /home/ folder.
Server Name: Pam's Big World
Roles: We have an end-game server, the focus is building and designing. The world is your oyster.
Age Range: All are welcome.
Timezone: Server is located in the US ET but we have groups in US, EU, AUS.
Server Info: Discord: https://discord.com/gg/ubgaGwp
The map is 4x4KM, the specialization is set to Very High, we have a protected Town Square district with centralized vendors using our global currency. Plenty of land as we clear claims after 14 days of inactivity. Roads have been made to reach 500meters out per cardinal direction with continued expansion. The server is restarted at 4 AM EST daily.