add gpio led uart

hc

2024-05-10 748e4f3d702def1a4bff191e0cf93b6a05340f01

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# /etc/nsswitch.conf
 
passwd:         files
group:          files
shadow:         files
 
hosts:          files dns
networks:       files dns
 
protocols:      files
services:       files
ethers:         files
rpc:            files