| Long: version | 
 | Short: V | 
 | Help: Show version number and quit | 
 | --- | 
 | Displays information about curl and the libcurl version it uses. | 
 |  | 
 | The first line includes the full version of curl, libcurl and other 3rd party | 
 | libraries linked with the executable. | 
 |  | 
 | The second line (starts with "Protocols:") shows all protocols that libcurl | 
 | reports to support. | 
 |  | 
 | The third line (starts with "Features:") shows specific features libcurl | 
 | reports to offer. Available features include: | 
 | .RS | 
 | .IP "IPv6" | 
 | You can use IPv6 with this. | 
 | .IP "krb4" | 
 | Krb4 for FTP is supported. | 
 | .IP "SSL" | 
 | SSL versions of various protocols are supported, such as HTTPS, FTPS, POP3S | 
 | and so on. | 
 | .IP "libz" | 
 | Automatic decompression of compressed files over HTTP is supported. | 
 | .IP "NTLM" | 
 | NTLM authentication is supported. | 
 | .IP "Debug" | 
 | This curl uses a libcurl built with Debug. This enables more error-tracking | 
 | and memory debugging etc. For curl-developers only! | 
 | .IP "AsynchDNS" | 
 | This curl uses asynchronous name resolves. Asynchronous name resolves can be | 
 | done using either the c-ares or the threaded resolver backends. | 
 | .IP "SPNEGO" | 
 | SPNEGO authentication is supported. | 
 | .IP "Largefile" | 
 | This curl supports transfers of large files, files larger than 2GB. | 
 | .IP "IDN" | 
 | This curl supports IDN - international domain names. | 
 | .IP "GSS-API" | 
 | GSS-API is supported. | 
 | .IP "SSPI" | 
 | SSPI is supported. | 
 | .IP "TLS-SRP" | 
 | SRP (Secure Remote Password) authentication is supported for TLS. | 
 | .IP "HTTP2" | 
 | HTTP/2 support has been built-in. | 
 | .IP "UnixSockets" | 
 | Unix sockets support is provided. | 
 | .IP "HTTPS-proxy" | 
 | This curl is built to support HTTPS proxy. | 
 | .IP "Metalink" | 
 | This curl supports Metalink (both version 3 and 4 (RFC 5854)), which | 
 | describes mirrors and hashes.  curl will use mirrors for failover if | 
 | there are errors (such as the file or server not being available). | 
 | .IP "PSL" | 
 | PSL is short for Public Suffix List and means that this curl has been built | 
 | with knowledge about "public suffixes". | 
 | .RE |