How to set limit on directory size in Linux? [closed]

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Quota is based upon filesystems, but you can always create a virtual filesystem and mount it on a specific (empty) directory with the usrquota and/or grpquota flags.

In steps this will be:

  1. create the mount point
  2. create a file full of /dev/zero, large enough to the maximum size you want to reserve for the virtual filesystem
  3. format this file with an ext3 filesystem (you can format a disk space even if it is not a block device, but double check the syntax of every – dangerous – formatting command)
  4. mount the newly formatted disk space in the directory you’ve created as mount point, e.g.
    Code:
    mount -o loop,rw,usrquota,grpquota /path/to/the/formatted/disk/space /path/of/mount/point
  5. Set proper permissions
  6. Set quotas
    and the trick is done.

Tutorial here.
Original answer here

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