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Top Forums UNIX for Beginners Questions & Answers How to check via SSH and credentials if file on remote server exists? Post 303031840 by rbatte1 on Wednesday 6th of March 2019 11:42:00 AM
Old 03-06-2019
It's difficult to say, in a way. What do you want to do with the output from the ssh command? Because the output will be in a standard format, you might be able to call stat just once for all of them. The output will be one long trail, but there is a clear marker for the file name, size and other information. You can even direct it to format in a way most useful to you.

If you fancy a fairly terse output, you could try ssh $username@target_server "stat -t $files_to_check" or push it even further with ssh $username@target_server "stat -tc '%n' $files_to_check" which will give you the filenames that exist or a message something like stat: cannot stat `not_a_file': No such file or directory as one big list of output.


What do you eventually want to get out of it?

Are any files likely to be a symbolic link? You might need to add the -L flag to follow links to check them.




Does this help,
Robin

Last edited by rbatte1; 03-06-2019 at 12:44 PM.. Reason: Corrected formatting definition for last suggestion.
 

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SSH-COPY-ID(1)						      General Commands Manual						    SSH-COPY-ID(1)

NAME
ssh-copy-id - install your public key in a remote machine's authorized_keys SYNOPSIS
ssh-copy-id [-i [identity_file]] [user@]machine DESCRIPTION
ssh-copy-id is a script that uses ssh to log into a remote machine and append the indicated identity file to that machine's ~/.ssh/autho- rized_keys file. If the -i option is given then the identity file (defaults to ~/.ssh/id_rsa.pub) is used, regardless of whether there are any keys in your ssh-agent. Otherwise, if this: ssh-add -L provides any output, it uses that in preference to the identity file. If the -i option is used, or the ssh-add produced no output, then it uses the contents of the identity file. Once it has one or more fin- gerprints (by whatever means) it uses ssh to append them to ~/.ssh/authorized_keys on the remote machine (creating the file, and directory, if necessary.) NOTES
This program does not modify the permissions of any pre-existing files or directories. Therefore, if the remote sshd has StrictModes set in its configuration, then the user's home, ~/.ssh folder, and ~/.ssh/authorized_keys file may need to have group writability disabled manu- ally, e.g. via chmod go-w ~ ~/.ssh ~/.ssh/authorized_keys on the remote machine. SEE ALSO
ssh(1), ssh-agent(1), sshd(8) OpenSSH 14 November 1999 SSH-COPY-ID(1)
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