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syntax: markdown
tags: [tldr, linux]
source: https://github.com/tldr-pages/tldr.git
---
# zramctl

> Setup and control zram devices.
> Use `mkfs` or `mkswap` to format zram devices to partitions.
> More information: <https://manned.org/zramctl>.

- Check if zram is enabled:

`lsmod | grep -i zram`

- Enable zram with a dynamic number of devices (use `zramctl` to configure devices further):

`sudo modprobe zram`

- Enable zram with exactly 2 devices:

`sudo modprobe zram num_devices={{2}}`

- Find and initialize the next free zram device to a 2 GB virtual drive using LZ4 compression:

`sudo zramctl --find --size {{2GB}} --algorithm {{lz4}}`

- List currently initialized devices:

`sudo zramctl`
