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Full Discussion: How to check via SSH and credentials if file on remote server exists?
Top Forums UNIX for Beginners Questions & Answers How to check via SSH and credentials if file on remote server exists? Post 303031846 by Corona688 on Wednesday 6th of March 2019 12:36:52 PM
Old 03-06-2019
Quote:
Originally Posted by Jens885544
But maybe you can give me a hint: I now build in the working code into my script. The script does a foreach on 7000 files. Is it a recommended way to do
"if ssh 'ssh-user0815@example.com' stat $FILETOCHECK \> /dev/null 2\>\&1"
on every file? I ask because to me it looks like it builds then 7000 times a ssh connection.
Is there a way to build it once and then check the files?
I'd have a local file with 7,000 filenames in it:
Code:
/path/to/file1
/path/to/file2
/path/to/whatever
etc

And run ssh once:

Code:
ssh username@host 'while read -r FILE ; do [ -e "$FILE" ] && echo "$FILE exists" || echo "$FILE missing" ; done' < fileslist

 

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LEARN ABOUT DEBIAN

secsh

SECSH(5)							    Lsh Manuals 							  SECSH(5)

NAME

       secsh - the Secure Shell protocol

DESCRIPTION

       secsh  is  a  protocol suite for secure remote login and other secure network services over an insecure network. It is outlined in [SECSH].
       It has three major components:

       The Transport layer protocol
	      This protocol, specified in [SECSH-TLP], provides  server  authentication,  confidentiality,  and  integrity  with  perfect  forward
	      secrecy.

       The User authentication protocol
	      This protocol, specified in [SECSH-AUTH], is used to authenticate a client to a server.

       The Connection protocol
	      This protocol, specified in [SECSH-CONN], multiplexes an encrypted tunnel into several logical channels.

IMPLEMENTATIONS

       Several implementations of the secsh protocol suite exist.

       The SSH2 product of SSH Communications Security Ltd., Finland <URL:http://www.ssh.fi> was the first. The secsh protocol suite has benefited
       a lot from their experience with their older SSH1 product, which is still in widespread use; it implements an older protocol ([SSH1]).

       The lsh suite of programs is a free implementation of the secsh protocol suite; it is distributed under the GNU General Public License.

REFERENCES

       [SECSH-ARCH] T. Ylonen, T. Kivinen, M. Saarinen, T. Rinne and S. Lehtinen, SSH Protocol Architecture, Internet draft, 6 August 1998

       [SECSH-TRANS] T. Ylonen, T. Kivinen, M. Saarinen, T. Rinne and S. Lehtinen, SSH Transport Layer Protocol, Internet draft, 6 August 1998

       [SECSH-AUTH] T. Ylonen, T. Kivinen, M. Saarinen, T. Rinne and S. Lehtinen, SSH Authentication Protocol, Internet draft, 6 August 1998

       [SECSH-CONN] T. Ylonen, T. Kivinen, M. Saarinen, T. Rinne and S. Lehtinen SSH Connection Protocol, Internet draft, 6 August 1998

       [SSH1] T. Ylonen, The SSH (Secure Shell) Remote Login Protocol, Internet draft (expired), 15 November 1995

TRADEMARKS

       SSH and Secure Shell are trademarks or registered trademarks of SSH Communications Security Ltd.

AUTHOR

       This man-page was written by J.H.M. Dassen (Ray) <jdassen@wi.LeidenUniv.nl>.

SEE ALSO

       lsh(1), lshd(8), ssh2(1), sshd2(8), ssh1(1), sshd1(8)

LSH
								   JANUARY 1999 							  SECSH(5)
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