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+---
+obj: application
+website: https://dystroy.org/dysk
+repo: https://github.com/Canop/dysk
+---
+
+# dysk
+dysk is a [linux](../../linux/Linux.md) utility listing your [filesystems](../../linux/filesystems/Filesystems.md).
+
+## 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](../../linux/filesystems/Filesystems.md). 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](../../files/CSV.md):
+
+`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](../../files/JSON.md)
+Use `-j` or `--json`. The normal output is an array of all filesystem matching the filter.
+
+`dysk -j | jq '.[0]' > disk.json`
+
+```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](../../linux/filesystems/Filesystems.md).
+
+### 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](../../linux/filesystems/Filesystems.md) 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%'`