The ps3netsrv from aldostools usually only comes compiled for Windows.
In here I store the linux versions I compiled.

Packages comes with 32bit and 64bit versions. 32bit version should work for pies.
All other instructions for pies comes with the webMAN_MOD source code package at https://github.com/aldostools/webMAN-MOD
Example: https://github.com/aldostools/webMAN-MOD/releases/tag/1.43.28

Personally, I launch it in Linux like this
./ps3netsrv64 /mnt/ps3 38008 192.168.101.* &
Where 38008 is the port to listen to. That port is the default in webMAN-MOD.
/mnt/ps3 is where I have my GAMES, PS3ISO folders etc.
192.168.101.* means that it should only answer requests from IPs in that range.