2022-06-14 06:12:03 +08:00
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c: Copyright (C) 1998 - 2022, Daniel Stenberg, <daniel@haxx.se>, et al.
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SPDX-License-Identifier: curl
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2016-11-28 08:01:13 +08:00
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Long: user
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Short: u
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Arg: <user:password>
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Help: Server user and password
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2020-07-13 20:15:04 +08:00
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Category: important auth
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2021-08-31 22:37:14 +08:00
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Example: -u user:secret $URL
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2021-09-28 17:50:07 +08:00
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Added: 4.0
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2021-11-15 22:58:20 +08:00
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See-also: netrc config
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2022-10-18 16:39:43 +08:00
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Multi: single
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2016-11-28 08:01:13 +08:00
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---
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Specify the user name and password to use for server authentication. Overrides
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--netrc and --netrc-optional.
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If you simply specify the user name, curl will prompt for a password.
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The user name and passwords are split up on the first colon, which makes it
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impossible to use a colon in the user name with this option. The password can,
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still.
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2019-03-14 18:49:35 +08:00
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On systems where it works, curl will hide the given option argument from
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process listings. This is not enough to protect credentials from possibly
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getting seen by other users on the same system as they will still be visible
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2021-11-01 20:43:11 +08:00
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for a moment before cleared. Such sensitive data should be retrieved from a
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file instead or similar and never used in clear text in a command line.
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2019-03-14 18:49:35 +08:00
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2016-11-28 08:01:13 +08:00
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When using Kerberos V5 with a Windows based server you should include the
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Windows domain name in the user name, in order for the server to successfully
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2021-10-31 23:34:44 +08:00
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obtain a Kerberos Ticket. If you do not, then the initial authentication
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2016-11-28 08:01:13 +08:00
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handshake may fail.
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When using NTLM, the user name can be specified simply as the user name,
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without the domain, if there is a single domain and forest in your setup
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for example.
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To specify the domain name use either Down-Level Logon Name or UPN (User
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Principal Name) formats. For example, EXAMPLE\\user and user@example.com
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respectively.
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If you use a Windows SSPI-enabled curl binary and perform Kerberos V5,
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Negotiate, NTLM or Digest authentication then you can tell curl to select
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the user name and password from your environment by specifying a single colon
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with this option: "-u :".
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