Welcome to XiaoQiang!
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root@XiaoQiang:~# ./ps3netsrv /userdisk/data/
-ash: ./ps3netsrv: not found
root@XiaoQiang:~# cd /opt
root@XiaoQiang:/opt# ./ps3netsrv /userdisk/data/
Error in initialization.
root@XiaoQiang:/opt# ./ps3netsrv
-ash: ./ps3netsrv: Permission denied
root@XiaoQiang:/opt# chmod +x ps3netsrv
root@XiaoQiang:/opt# ./ps3netsrv
Usage: ./ps3netsrv rootdirectory [port] [whitelist]
Default port: 38008
Whitelist: x.x.x.x, where x is 0-255 or * (e.g 192.168.1.* to allow only connections from 192.168.1.0-192.168.1.255)
root@XiaoQiang:/opt#
root@XiaoQiang:/opt# ./ps3netsrv /userdisk/data/
Error in initialization.
root@XiaoQiang:/opt#