Description of problem: When using ssh-copy-id to copy the ssh public key to a remote server, if the account on the remote server uses a shell that is not based on sh or bash (like tcsh), then the script will fail with the message 'Ambiguous output redirect.'. This message is caused by the redirection of STDOUT and STDERR using the sh syntax 2>&1 which is invalid for tcsh. Specific details: In the file /usr/bin/ssh-copy-id at line 275 we have the following: if type restorecon >/dev/null 2>&1 ; then restorecon -F .ssh .ssh/authorized_keys ; fi" \ This command is being executed on the remote machine using the default shell of the remote account. If the remote shell is tcsh (or any other shell that doesn't support the 2>&1 syntax), the if type restorecon >/dev/null 2>&1 ; command fails. Version-Release number of selected component (if applicable): 6.2p2-6.fc19 How reproducible: Always Steps to Reproduce: 1. Create an account on a remote machine using tcsh for the shell (or any other shell that doesn't support the 2>&1 syntax) 2. Generate an ssh key on the local machine ssh-keygen -t rsa -b 2048 3. Run ssh-copy-id on the local machine (the command below assumes the login id is the same on both machines ssh-copy-id x.x.x.x Actual results: The script exits with Ambiguous output redirect. Expected results: The script successfully runs with Number of key(s) added: 1 Now try logging into the machine, with: "ssh 'x.x.x.x'" and check to make sure that only the key(s) you wanted were added. Additional info: I was able to fix this bug by basically specifying that the ssh command should use the sh shell instead of the default shell of the remote account. The changes I made to the ssh-copy-id script are as follows: Starting at line 273, change the lines umask 077 ; mkdir -p .ssh && cat >> .ssh/authorized_keys || exit 1 ; if type restorecon >/dev/null 2>&1 ; then restorecon -F .ssh .ssh/authorized_keys ; fi" \ To the following single line - add "exec sh -c" at the beginning and surround the commands in single quotes exec sh -c 'umask 077 ; mkdir -p .ssh && cat >> .ssh/authorized_keys || exit 1 ; if type restorecon >/dev/null 2>&1 ; then restorecon -F .ssh .ssh/authorized_keys ; fi'" \ I'm not sure if this is the best fix, but it works regardless of the remote shell.
Your fix seems to be reasonable but I've re-send your report to the upstream bugzilla [1] to see how it should be fixed. Thanks for the report. [1] https://bugzilla.mindrot.org/show_bug.cgi?id=2206
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This bug still exists in Fedora 20, thus I bumped the version to 20.
Still an issue on Fedora 21, can this be reopened. I have updated upstream bug report.
openssh-6.6.1p1-12.fc21 has been submitted as an update for Fedora 21. https://admin.fedoraproject.org/updates/openssh-6.6.1p1-12.fc21
openssh-6.6.1p1-12.fc21 has been pushed to the Fedora 21 stable repository. If problems still persist, please make note of it in this bug report.