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I want to get the last folders name from a pi and this commands works just fine:

ssh pi@192.168.6.24 'ls -t /media/usb/Pictures/new/ | head -1'

Returns: 230125_1356

To retrieve the number of files in that folder I'm using:

ssh pi@192.168.6.24 ls -t /media/usb/Pictures/new/$(ssh pi@192.168.6.24 'ls -t /media/usb/Pictures/new/ | head -1')/ | wc -l

Returns: 5

But now I'm trying to get the same results from another pi connected to the first one: This one works fine and gives me the name of the last folder:

ssh -t pi@192.168.6.24 ssh pi@192.168.0.50 'ls -t /media/usb/Pictures/new/ | head -1'

Returns: 230125_1356

My problem arises when I try to get the number of files inside the last folder over the second pi with:

ssh -t pi@192.168.6.24 ssh pi@192.168.0.50 ls -t /media/usb/Pictures/new/$(ssh -t pi@192.168.6.24 ssh pi@192.168.0.50 ls -t /media/usb/Pictures/new/ | head -1)/ | wc -l

Returns: 1

The return should be 4 which is the number of files in that folder.

Any help will be much appreciated. Thanks.

Mark
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  • Consider using something like sshfs if you do this a lot. Parsing the output of ls should be avoided. – Panki Jan 26 '23 at 07:57
  • Thanks Panki for your answer, I've tried this command and it doesn't work, I can't see the mounted filesystem in the mounted point. sudo sshfs -o sshfs_debug laptop@192.168.6.89:/ /mnt/field_laptop

    SSHFS version 2.10.0 laptop@192.168.6.89's password: Server version: 3 Extension: posix-rename@openssh.com <1> Extension: statvfs@openssh.com <2> Extension: fstatvfs@openssh.com <2> Extension: hardlink@openssh.com <1> Extension: fsync@openssh.com <1>

     – Mark Jan 26 '23 at 14:11

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