Linux file/directory ownership: I can cp a file but not backup via unison











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I have a question on Linux file/directory ownership that is allowing me to copy a file using cp, but not back it up via the utility unison. The problem appears to be in the change of ownership for a temp file of unison's. I'd like to know how to correct this.



The file is in a directory structure that looks like:



/.../A/B/C/D.txt


Ownership & permissions look like:



A is root:root, 500 (rx)
B is me:root, 500 (rx)
C is me:root, 700 (rwx)
D.txt is me:root, 600 (rw)


If I cp D.txt to an identically owned and permissioned file structure on my desktop that starts at B, everything is fine. On the other hand, if I use unison to copy the directory structure, it fails on an ownership change for a ".unison.D.txt.nnnnn" file. Is there a fix?




UNISON 2.48.3 started propagating changes at 02:53:54.51 on 20 Nov 2018



[BGN] Copying B/C/D.txt from /.../A to /home/me/Desktop/ [ie to /home/me/Desktop/B/C/D.txt]



Failed: Error in setting file ownership:

Operation not permitted [chown(/home/me/Desktop/B/C/.unison.testing.txt.a14bcb4fe76cb8c262af6a50e2043619.unison.tmp)]



Failed [B/C/D.txt]: Error in setting file ownership:

Operation not permitted [chown(/home/me/Desktop/B/C/.unison.testing.txt.a14bcb4fe76cb8c262af6a50e2043619.unison.tmp)]



UNISON 2.48.3 finished propagating changes at 02:53:54.51 on 20 Nov 2018




Background: I am trying to use unison & incron to backup Keybase's online file-system, which exists at /run/user/1000/keybase/kbfs. Below that directory, I find a collection of folders are all owned by me:root. All directories are mode 500 (rx), save my own (/.../kbfs/private/me) which is 700 (rwx). All files are mode 600 (rw). I want that mirrored on my desktop.










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  • 1




    It looks to me that the error is not copying the file, but rather retaining the ownership permissions. Is /home a local disk (if so, what partition type) or some kind of mount - and if the latter, is it using SMB, NFS or something else?
    – davidgo
    Nov 21 at 1:26










  • /home is a btrfs subvolume, @home which, with @ (root) are on the same primary partition of my SSD.
    – Diagon
    Nov 21 at 1:28















up vote
1
down vote

favorite












I have a question on Linux file/directory ownership that is allowing me to copy a file using cp, but not back it up via the utility unison. The problem appears to be in the change of ownership for a temp file of unison's. I'd like to know how to correct this.



The file is in a directory structure that looks like:



/.../A/B/C/D.txt


Ownership & permissions look like:



A is root:root, 500 (rx)
B is me:root, 500 (rx)
C is me:root, 700 (rwx)
D.txt is me:root, 600 (rw)


If I cp D.txt to an identically owned and permissioned file structure on my desktop that starts at B, everything is fine. On the other hand, if I use unison to copy the directory structure, it fails on an ownership change for a ".unison.D.txt.nnnnn" file. Is there a fix?




UNISON 2.48.3 started propagating changes at 02:53:54.51 on 20 Nov 2018



[BGN] Copying B/C/D.txt from /.../A to /home/me/Desktop/ [ie to /home/me/Desktop/B/C/D.txt]



Failed: Error in setting file ownership:

Operation not permitted [chown(/home/me/Desktop/B/C/.unison.testing.txt.a14bcb4fe76cb8c262af6a50e2043619.unison.tmp)]



Failed [B/C/D.txt]: Error in setting file ownership:

Operation not permitted [chown(/home/me/Desktop/B/C/.unison.testing.txt.a14bcb4fe76cb8c262af6a50e2043619.unison.tmp)]



UNISON 2.48.3 finished propagating changes at 02:53:54.51 on 20 Nov 2018




Background: I am trying to use unison & incron to backup Keybase's online file-system, which exists at /run/user/1000/keybase/kbfs. Below that directory, I find a collection of folders are all owned by me:root. All directories are mode 500 (rx), save my own (/.../kbfs/private/me) which is 700 (rwx). All files are mode 600 (rw). I want that mirrored on my desktop.










share|improve this question




















  • 1




    It looks to me that the error is not copying the file, but rather retaining the ownership permissions. Is /home a local disk (if so, what partition type) or some kind of mount - and if the latter, is it using SMB, NFS or something else?
    – davidgo
    Nov 21 at 1:26










  • /home is a btrfs subvolume, @home which, with @ (root) are on the same primary partition of my SSD.
    – Diagon
    Nov 21 at 1:28













up vote
1
down vote

favorite









up vote
1
down vote

favorite











I have a question on Linux file/directory ownership that is allowing me to copy a file using cp, but not back it up via the utility unison. The problem appears to be in the change of ownership for a temp file of unison's. I'd like to know how to correct this.



The file is in a directory structure that looks like:



/.../A/B/C/D.txt


Ownership & permissions look like:



A is root:root, 500 (rx)
B is me:root, 500 (rx)
C is me:root, 700 (rwx)
D.txt is me:root, 600 (rw)


If I cp D.txt to an identically owned and permissioned file structure on my desktop that starts at B, everything is fine. On the other hand, if I use unison to copy the directory structure, it fails on an ownership change for a ".unison.D.txt.nnnnn" file. Is there a fix?




UNISON 2.48.3 started propagating changes at 02:53:54.51 on 20 Nov 2018



[BGN] Copying B/C/D.txt from /.../A to /home/me/Desktop/ [ie to /home/me/Desktop/B/C/D.txt]



Failed: Error in setting file ownership:

Operation not permitted [chown(/home/me/Desktop/B/C/.unison.testing.txt.a14bcb4fe76cb8c262af6a50e2043619.unison.tmp)]



Failed [B/C/D.txt]: Error in setting file ownership:

Operation not permitted [chown(/home/me/Desktop/B/C/.unison.testing.txt.a14bcb4fe76cb8c262af6a50e2043619.unison.tmp)]



UNISON 2.48.3 finished propagating changes at 02:53:54.51 on 20 Nov 2018




Background: I am trying to use unison & incron to backup Keybase's online file-system, which exists at /run/user/1000/keybase/kbfs. Below that directory, I find a collection of folders are all owned by me:root. All directories are mode 500 (rx), save my own (/.../kbfs/private/me) which is 700 (rwx). All files are mode 600 (rw). I want that mirrored on my desktop.










share|improve this question















I have a question on Linux file/directory ownership that is allowing me to copy a file using cp, but not back it up via the utility unison. The problem appears to be in the change of ownership for a temp file of unison's. I'd like to know how to correct this.



The file is in a directory structure that looks like:



/.../A/B/C/D.txt


Ownership & permissions look like:



A is root:root, 500 (rx)
B is me:root, 500 (rx)
C is me:root, 700 (rwx)
D.txt is me:root, 600 (rw)


If I cp D.txt to an identically owned and permissioned file structure on my desktop that starts at B, everything is fine. On the other hand, if I use unison to copy the directory structure, it fails on an ownership change for a ".unison.D.txt.nnnnn" file. Is there a fix?




UNISON 2.48.3 started propagating changes at 02:53:54.51 on 20 Nov 2018



[BGN] Copying B/C/D.txt from /.../A to /home/me/Desktop/ [ie to /home/me/Desktop/B/C/D.txt]



Failed: Error in setting file ownership:

Operation not permitted [chown(/home/me/Desktop/B/C/.unison.testing.txt.a14bcb4fe76cb8c262af6a50e2043619.unison.tmp)]



Failed [B/C/D.txt]: Error in setting file ownership:

Operation not permitted [chown(/home/me/Desktop/B/C/.unison.testing.txt.a14bcb4fe76cb8c262af6a50e2043619.unison.tmp)]



UNISON 2.48.3 finished propagating changes at 02:53:54.51 on 20 Nov 2018




Background: I am trying to use unison & incron to backup Keybase's online file-system, which exists at /run/user/1000/keybase/kbfs. Below that directory, I find a collection of folders are all owned by me:root. All directories are mode 500 (rx), save my own (/.../kbfs/private/me) which is 700 (rwx). All files are mode 600 (rw). I want that mirrored on my desktop.







file-permissions ubuntu-18.04 unison keybase incron






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edited Nov 25 at 1:50









fixer1234

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17.4k144281










asked Nov 21 at 1:07









Diagon

431414




431414








  • 1




    It looks to me that the error is not copying the file, but rather retaining the ownership permissions. Is /home a local disk (if so, what partition type) or some kind of mount - and if the latter, is it using SMB, NFS or something else?
    – davidgo
    Nov 21 at 1:26










  • /home is a btrfs subvolume, @home which, with @ (root) are on the same primary partition of my SSD.
    – Diagon
    Nov 21 at 1:28














  • 1




    It looks to me that the error is not copying the file, but rather retaining the ownership permissions. Is /home a local disk (if so, what partition type) or some kind of mount - and if the latter, is it using SMB, NFS or something else?
    – davidgo
    Nov 21 at 1:26










  • /home is a btrfs subvolume, @home which, with @ (root) are on the same primary partition of my SSD.
    – Diagon
    Nov 21 at 1:28








1




1




It looks to me that the error is not copying the file, but rather retaining the ownership permissions. Is /home a local disk (if so, what partition type) or some kind of mount - and if the latter, is it using SMB, NFS or something else?
– davidgo
Nov 21 at 1:26




It looks to me that the error is not copying the file, but rather retaining the ownership permissions. Is /home a local disk (if so, what partition type) or some kind of mount - and if the latter, is it using SMB, NFS or something else?
– davidgo
Nov 21 at 1:26












/home is a btrfs subvolume, @home which, with @ (root) are on the same primary partition of my SSD.
– Diagon
Nov 21 at 1:28




/home is a btrfs subvolume, @home which, with @ (root) are on the same primary partition of my SSD.
– Diagon
Nov 21 at 1:28










1 Answer
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The problem does not appear to be unison, but the fact that on one side of the copy is a filesystem run by keybase. Keybase is allowing me to write into it's directory and reporting me:root ownership, but when unison tries to create a me:root file on my Desktop, it fails. I understand that filesystems can pretty much report anything they want regarding permissions and behave any way they want regarding ability to read/write/execute.



The solution for unison is to use group = false to keep it from trying to sync the root ownership. In that case, it also needs perms = 0o1700 to avoid trying to set the root's or others' permission bits.



That works when unison is run from the cli, but is continuing to present problems when used with incrond - but that's for another question...






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    up vote
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    down vote



    accepted










    The problem does not appear to be unison, but the fact that on one side of the copy is a filesystem run by keybase. Keybase is allowing me to write into it's directory and reporting me:root ownership, but when unison tries to create a me:root file on my Desktop, it fails. I understand that filesystems can pretty much report anything they want regarding permissions and behave any way they want regarding ability to read/write/execute.



    The solution for unison is to use group = false to keep it from trying to sync the root ownership. In that case, it also needs perms = 0o1700 to avoid trying to set the root's or others' permission bits.



    That works when unison is run from the cli, but is continuing to present problems when used with incrond - but that's for another question...






    share|improve this answer



























      up vote
      0
      down vote



      accepted










      The problem does not appear to be unison, but the fact that on one side of the copy is a filesystem run by keybase. Keybase is allowing me to write into it's directory and reporting me:root ownership, but when unison tries to create a me:root file on my Desktop, it fails. I understand that filesystems can pretty much report anything they want regarding permissions and behave any way they want regarding ability to read/write/execute.



      The solution for unison is to use group = false to keep it from trying to sync the root ownership. In that case, it also needs perms = 0o1700 to avoid trying to set the root's or others' permission bits.



      That works when unison is run from the cli, but is continuing to present problems when used with incrond - but that's for another question...






      share|improve this answer

























        up vote
        0
        down vote



        accepted







        up vote
        0
        down vote



        accepted






        The problem does not appear to be unison, but the fact that on one side of the copy is a filesystem run by keybase. Keybase is allowing me to write into it's directory and reporting me:root ownership, but when unison tries to create a me:root file on my Desktop, it fails. I understand that filesystems can pretty much report anything they want regarding permissions and behave any way they want regarding ability to read/write/execute.



        The solution for unison is to use group = false to keep it from trying to sync the root ownership. In that case, it also needs perms = 0o1700 to avoid trying to set the root's or others' permission bits.



        That works when unison is run from the cli, but is continuing to present problems when used with incrond - but that's for another question...






        share|improve this answer














        The problem does not appear to be unison, but the fact that on one side of the copy is a filesystem run by keybase. Keybase is allowing me to write into it's directory and reporting me:root ownership, but when unison tries to create a me:root file on my Desktop, it fails. I understand that filesystems can pretty much report anything they want regarding permissions and behave any way they want regarding ability to read/write/execute.



        The solution for unison is to use group = false to keep it from trying to sync the root ownership. In that case, it also needs perms = 0o1700 to avoid trying to set the root's or others' permission bits.



        That works when unison is run from the cli, but is continuing to present problems when used with incrond - but that's for another question...







        share|improve this answer














        share|improve this answer



        share|improve this answer








        edited Nov 24 at 12:08

























        answered Nov 24 at 9:34









        Diagon

        431414




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