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*dysk was previously known as lfs but was renamed because that name was used by too many things.*
# Purpose
**dysk** is a linux utility listing your filesystems.
Usage is shown in a graphical way.
Besides traditional columns, the `disk` column helps you identify your "disk" (or the mapping standing between your filesystem and the physical device) :
* `remov` : a removable device (such as an USB key)
* `HDD` : a rotational disk
* `SSD` : a solid state storage device
* `RAM` : an in-memory device (such as zram)
* `LVM` : a device mapped to one or several disks using LVM
* `crypt` : a crypted disk
By default, only the "normal" devices, the ones you're usually interested about, are shown, but you can see the other ones with the `-a` option.
All sizes are normally based on the current SI recommendations (1M is one million bytes) but can be changed with `--units binary` (then 1M is 1,048,576 bytes).
# Tables
The default display of **dysk** is a table, which can be configured with the columns of your choice.
See [Table](./table) for the definition of the columns and the syntax for choosing them, or on how to [sort rows](./table#sort).
The table can also be exported in [CSV](./table#csv).
# JSON
`dysk --json` outputs the result as JSON which can be used for your own scripts or programs.
# Filters
The query syntax lets you specify the filesystems you want:
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