dysk

dysk is a linux utility listing your filesystems.

Usage

Usage: dysk [-a, --all] [PATH]

Table

The standard output of dysk is a table with a default set of columns and only the “normal looking” filesystems. You can modify it easily.

Columns

You can run dysk --list-cols for the list of all columns.

All columns:

name	default	meaning
id		mount point id
dev		device id
filesystem	✓	filesystem
label		label
type	✓	filesystem type
remote		whether it’s a remote filesystem
disk	✓	short tag of the underlying storage identified
used	✓	cumulated size of the occupied blocks
use	✓	graphical view of the use share
use_percent		percentage of occupied blocks
free	✓	cumulated size of the available blocks
free_percent		percentage of available blocks
size	✓	size of the volume
inodesfree		available inodes
inodesused		inodes used
inodes		inodes use share, graphical
inodes_use_percent		inodes use share, in percents
inodescount		total number of inodes in the filesystem
mount	✓	mounting path

Choose columns

With the --cols launch argument, shortened as -c, you can change the displayed columns or their order.

With -c all, you may see all available columns, but that’s normally too much for convenience:

The most obvious use of the --cols argument is the explicit definition of the columns to display. For example dysk -c label+use+size+disk+mount will show the label, use, size, disk, and mount columns, in that order.

Sort

With the --sort launch argument, shortened as -s, you can specify the order of displayed rows.

The argument’s value must be either a column name, for example dysk -s dev, or a column name and a direction, for example dysk --sort size-desc.

The desc and asc directions can be abbreviated into d and a.

CSV

With the --csv argument, you can ask dysk to output the table in CSV:

dysk --csv > mounts.csv

You may choose the separator with the --csv-separator argument.

Filters, sorting, and column selection work the same than for standard tables so you may do this:

dysk --csv -f 'size>100G' -c remote+default+inodes > mounts.csv

JSON

Use -j or --json. The normal output is an array of all filesystem matching the filter.

dysk -j | jq '.[0]' > disk.json

{
  "bound": false,
  "dev": {
    "major": 8,
    "minor": 1
  },
  "disk": {
    "crypted": false,
    "ram": false,
    "removable": false,
    "rotational": false,
    "type": "SSD"
  },
  "fs": "/dev/sda1",
  "fs-label": null,
  "fs-type": "ext4",
  "id": 26,
  "mount-point": "/",
  "remote": false,
  "stats": {
    "available": "81G",
    "bavail": 19764035,
    "bfree": 22790364,
    "blocks": 59233748,
    "bsize": 4096,
    "inodes": {
      "avail": 13880393,
      "files": 15114240,
      "free": 13880393,
      "used-percent": "8%"
    },
    "size": "243G",
    "used": "162G",
    "used-percent": "67%"
  },
  "unreachable": false
}

The disk, stats, and stats.inodes structures, or the fs-label, may be null for some filesystems.

Filter

The --filter argument, shortened in -f, lets you specify a constraint, or combine several ones.

A constraint can be related to any column.

You can for example fetch the filesystems with a given type with dysk -f 'type=xfs'.

Or remote volumes with dysk -f 'remote=true'.

The operators you can apply to a column are the following ones:

operator	meaning
<	lower
<=	lower or equal
>	greater
>=	greater or equal
<>	different
=	somehow equal - for example fs=sda matches /dev/sda1
==	really equal

You can combine several column conditions with boolean operators | (or), & (and) and ! (not) and if needed you can use parenthesis.

For example you may want to select the volumes with not enough space with

dysk -f 'free<100G | use>65%'