查看版本
C:WINDOWSsystem32>curl --version
curl 7.64.0 (x86_64-pc-win32) libcurl/7.64.0 (OpenSSL/1.1.1b) Schannel zlib/1.2.11 brotli/1.0.7 WinIDN libssh2/1.8.0 nghttp2/1.36.0
Release-Date: 2019-02-06
Protocols: dict file ftp ftps gopher http https imap imaps ldap ldaps pop3 pop3s rtsp scp sftp smb smbs smtp smtps telnet tftp
Features: AsynchDNS IDN IPv6 Largefile SSPI Kerberos SPNEGO NTLM SSL libz brotli TLS-SRP HTTP2 MultiSSL
查看帮助
curl --help