ssh-copy-id fails if powershell is default shell #4691
Description
ssh-copy-id is a popular shebang bash script to make it easy to deploy public keys on target machines for key based authn.
The problem is that this script uses the POSIX shell cmd exec which is unknown to powershell:
ssh "$@" "exec sh -c 'cd ; umask 077 ; mkdir -p .ssh && cat >> .ssh/authorized_keysThis can block adoption of powershell as the default shell (via chsh)
Steps to reproduce
PS> ssh-copy-id user@hostExpected behavior
Success
Actual behavior
ssh-copy-id user@host/usr/bin/ssh-copy-id: INFO: attempting to log in with the new key(s), to filter out any that are already installed
/usr/bin/ssh-copy-id: INFO: 1 key(s) remain to be installed -- if you are prompted now it is to install the new keys
user@host's password:
exec : The term 'exec' is not recognized as the name of a cmdlet, function,
script file, or operable program. Check the spelling of the name, or if a path
was included, verify that the path is correct and try again.
At line:1 char:1
+ exec sh -c 'cd ; umask 077 ; mkdir -p .ssh && cat >> .ssh/authorized_ ...
+ ~~~~
+ CategoryInfo : ObjectNotFound: (exec:String) [], CommandNotFoun
dException
+ FullyQualifiedErrorId : CommandNotFoundException
Environment data
Name Value
---- -----
PSVersion 6.0.0-beta
PSEdition Core
GitCommitId v6.0.0-beta.6
OS Linux 4.10.0-32-generic #36~16.04.1-Ubuntu SMP Wed Aug 9 09:19:02 UTC 2017
Platform Unix
PSCompatibleVersions {1.0, 2.0, 3.0, 4.0...}
PSRemotingProtocolVersion 2.3
SerializationVersion 1.1.0.1
WSManStackVersion 3.0