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3rd-party/curl-7.52.1/docs/cmdline-opts/user.d

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+Long: user
+Short: u
+Arg: <user:password>
+Help: Server user and password
+---
+Specify the user name and password to use for server authentication. Overrides
+--netrc and --netrc-optional.
+
+If you simply specify the user name, curl will prompt for a password.
+
+The user name and passwords are split up on the first colon, which makes it
+impossible to use a colon in the user name with this option. The password can,
+still.
+
+When using Kerberos V5 with a Windows based server you should include the
+Windows domain name in the user name, in order for the server to successfully
+obtain a Kerberos Ticket. If you don't then the initial authentication
+handshake may fail.
+
+When using NTLM, the user name can be specified simply as the user name,
+without the domain, if there is a single domain and forest in your setup
+for example.
+
+To specify the domain name use either Down-Level Logon Name or UPN (User
+Principal Name) formats. For example, EXAMPLE\\user and user@example.com
+respectively.
+
+If you use a Windows SSPI-enabled curl binary and perform Kerberos V5,
+Negotiate, NTLM or Digest authentication then you can tell curl to select
+the user name and password from your environment by specifying a single colon
+with this option: "-u :".
+
+If this option is used several times, the last one will be used.