curl has two options: --connect-timeout and --max-time . Quoting from the manpage: --connect-timeout <seconds> Maximum time in seconds that you allow the ... ... <看更多>

CURL parameter --max-time includes --connect-timeout to separate the timeout of the handshake phase. ... In addition, CURL can distinguish timeout errors at ... ... <看更多>

The only difference, as far as I can see, is when the -s flag is removed: Connection timeout returns curl: (28) connect() timed out and; Max ... ... <看更多>