Error: INVALID_PORT: bad port (most likely missing protocol), correct s

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Error: INVALID_PORT: bad port (most likely missing protocol), correct s
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添加firewalld时报错：
firewall-cmd --add-port=3306
# z( d0 ?/ g! s4 e, T( ~6 t% W. EError: INVALID_PORT: bad port (most likely missing protocol), correct s
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是因为没有添加协议，整忙了发现忘记添加tcp或者udp协议了：
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5 S- s: R5 b. }! Y& Zfirewall-cmd --add-port=3306/tcp
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' T: g  \5 b- v+ h1 {显示为success
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