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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.
- On systems where it works, curl will hide the given option argument from
- process listings. This is not enough to protect credentials from possibly
- getting seen by other users on the same system as they will still be visible
- for a brief moment before cleared. Such sensitive data should be retrieved
- from a file instead or similar and never used in clear text in a command line.
- 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.
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