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  1. The legacy SCP protocol (selected by the -O flag) requires execution of the remote user's shell to perform glob (3) pattern matching. This requires careful quoting of any characters that have special meaning to the remote shell, such as quote characters.

    scp(1) - Linux manual page

    www.man7.org/linux/man-pages/man1/scp.1.html
    Use the legacy SCP protocol for file transfers instead of the SFTP protocol. Forcing the use of the SCP protocol may be necessary for servers that do not implement SFTP, for backwards-compatibility for particular filename wildcard patterns and for expanding paths with a ‘~’ prefix for older SFTP servers.

    scp(1) — openssh-client — Debian book…

    manpages.debian.org/scp
  2. People also ask
    What is Secure Copy Protocol (SCP)?
    Secure copy protocol (SCP) is a means of securely transferring computer files between a local host and a remote host or between two remote hosts. It is based on the Secure Shell (SSH) protocol. " SCP" commonly refers to both the Secure Copy Protocol and the program itself.

    Secure copy protocol - Wikipedia

    en.wikipedia.org
    What changes have been implemented in the SCP command line tool?
    These are the changes that we have implemented: The scp command line tool uses the SFTP protocol for file transfers by default. Usage of the SCP protocol can be restored using the newly added -O option. Usage of the SCP protocol can be completely disabled on the system.

    OpenSSH SCP deprecation in RHEL 9: What you need to know | Red Hat

    redhat.com
    What is SCP based on?
    scp is based on the rcp program in BSD source code from the Regents of the University of California. Since OpenSSH 9.0, scp has used the SFTP protocol for transfers by default. The legacy SCP protocol (selected by the -O flag) requires execution of the remote user's shell to perform glob (3) pattern matching.

    scp(1) - Linux manual page - man7.org

    man7.org
    What happens if I disable SCP?
    Usage of the SCP protocol can be completely disabled on the system. If the file /etc/ssh/disable_scp exists, any attempt to use the SCP protocol will fail. We’re making this change because the SCP protocol is decades old, and carries multiple security risks and issues that have no straightforward solutions.

    OpenSSH SCP deprecation in RHEL 9: What you need to know | Red Hat

    redhat.com
    Which SCP protocol does OpenSSH use?
    Note: Since OpenSSH 8.8 the scp utility uses the SFTP protocol by default. The -O option must be used to use the legacy SCP protocol. Warning: The scp protocol is outdated, inflexible and not readily fixed. Its authors recommend the use of more modern protocols like sftp and rsync for file transfer instead [see here].

    OpenSSH anything like 'internal-sftp' but for SCP?

    serverfault.com
    Is SCP a better alternative to RCP?
    The scp command, which uses the SSH protocol to copy files between machines, is deeply wired into the fingers of many Linux users and developers — doubly so for those of us who still think of it as a more secure replacement for rcp.

    Deprecating scp [LWN.net]

    lwn.net
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  3. redhat.com
    https://www.redhat.com › en › blog

    OpenSSH SCP deprecation in RHEL 9: What you need to know

  4. Super User
    https://superuser.com › questions

    Why doesn’t SCP work while SSH does? - Super User

    Tags:
    SCP Protocol
    File Transfer Protocol
    I Can Ssh But Not Scp
    Scp Out of Ssh
  5. Wikipedia
    https://en.wikipedia.org › wiki › Secure_copy_protocol

    Secure copy protocol - Wikipedia

  6. OpenSSH
    https://www.openssh.com › legacy.html

    OpenSSH: Legacy Options

  7. Super User
    https://superuser.com › questions › how-to-set...

    How to set scp -O (legacy protocol) option per config file?

    Tags:
    SCP Protocol
    How-to
  8. Stack Overflow
    https://stackoverflow.com › questions

    scp or sftp copy multiple files with single command

    Tags:
    SCP Protocol
    File Transfer Protocol
    Scp Copy Files
  9. LWN.net
    https://lwn.net › Articles

    Deprecating scp - LWN.net

    Tags:
    SCP Protocol
    Scp Copy Files
    The Scp Command
    Secure Copy Protocol
  10. Server Fault
    https://serverfault.com › questions › how-can...

    ssh - How can default scp transfer protocol be overriden besides

    Tags:
    SCP Protocol
    OpenSSH
  11. Server Fault
    https://serverfault.com › questions

    OpenSSH anything like 'internal-sftp' but for SCP? - Server Fault

    Tags:
    SCP Protocol
    File Transfer Protocol
    Forcecommand Internal Sftp Scp