如何使磁盘配额满

dd if=/dev/zero of=/home/usverg/test bs=1M count=1024 

#!/bin/bash

_pwd=$(pwd -P)

usage() {
  echo \"Setup or Teardown a loop device mount\"
  echo
  echo \"Normally, mount & umount require root-level access.\"
  echo \"You may need to run this script via \'sudo\'.\"
  echo
  echo \"Usage 1: $0 setup FILE SIZE DEVICE MOUNT\"
  echo \"         FILE is the virtual file system in a single file\"
  echo \"         SIZE is the size of the virtual filesystem in \'dd\' format\"
  echo \"              The minimum size appears to be 2M for ext3 file systems.\"
  echo \"         DEVICE is the loop device\"
  echo \"         MOUNT is the mount point (directory)\"
  echo
  echo \"Usage 2: $0 teardown FILE DEVICE MOUNT\"
  echo
  echo \"Example: $0 setup ./data.ext3 2M /dev/loop0 /mnt/loop0\"
  echo \"Example: $0 teardown ./data.ext3 /dev/loop0 /mnt/loop0\"
  echo
  exit 1
}

execute_command() {
  local command=\"$1\"
  echo \">>> $command\"
  eval \"$command\"
  local exit_code=$?
  if [ \"0\" != \"$exit_code\" ] ; then
    echo \">>> Command failed with exit code: $exit_code\"
    exit 1
  fi
}

execute_bad_command() {
  local command=\"$1\"
  echo \">>> $command\"
  eval \"$command\"
  local exit_code=$?
  if [ \"0\" == \"$exit_code\" ] ; then
    echo \">>> Command unexpectedly successful!\"
    exit 1
  fi
}

if [ -z \"$1\" ] ; then
  usage
fi

if [ \"setup\" = \"$1\" ] ; then

  if [ \"5\" != \"$#\" ] ; then
    usage
  fi
  VFS=$2
  SIZE=$3
  DEVICE=$4
  MOUNT=$5

  # Create a file
  execute_command \"dd if=/dev/zero of=${VFS} bs=${SIZE} count=1\"

  # Format the file with ext3 filesystem
  # We need \'yes\' here to ignore:
  #   ./data is not a block special device.
  #   Proceed anyway? (y,n)
  execute_command \"yes | /sbin/mkfs -t ext3 -m 1 -v ${VFS}\"

  if [ -d ${MOUNT} ] ; then
    execute_command \"rmdir ${MOUNT}\"
  fi

  # Create the mount point and enable read/write/execute for all users
  execute_command \"mkdir -m 0777 ${MOUNT}\"

  # Mount the file
  execute_command \"mount ${VFS} ${MOUNT} -t ext3 -o loop=${DEVICE}\"

  # Check the loopback setup
  # Example output: /dev/loop0: [0801]:17416195 (/home/kca/saveme/disk-full-test/data)
  execute_command \"/sbin/losetup ${DEVICE}\"

  # Test write
  execute_command \"echo abc > ${MOUNT}/dummy.txt\"

  # Clean-up test write
  execute_command \"rm ${MOUNT}/dummy.txt\"

  echo \"Try to fill new mount with junk data:\"

  # We expect to fail and see this error message:
  # dd: writing `/mnt/loop0/data\': No space left on device
  execute_bad_command \"dd if=/dev/zero of=${MOUNT}/junk bs=${SIZE} count=2\"

  # Clean-up junk write
  execute_command \"rm ${MOUNT}/junk\"

  echo \"Loop device mount setup and testing complete:\"
  echo \"${MOUNT}\"

elif [ \"teardown\" = \"$1\" ] ; then

  if [ \"4\" != \"$#\" ] ; then
    usage
  fi
  VFS=$2
  DEVICE=$3
  MOUNT=$4

  # Unmount the file
  execute_command \"umount ${MOUNT}\"

  # Check loop device after mount.  We expect to fail.
  # loop: can\'t get info on device /dev/loop0: No such device or address
  execute_bad_command \"/sbin/losetup ${DEVICE}\"

  execute_command \"rmdir ${MOUNT}\"

  execute_command \"rm ${VFS}\"

  echo \"Loop device mount teardown complete.\"

else
  usage
fi

exit 0