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cheatsheet-tldr/tldr/linux/zramctl
2025-03-29 00:18:23 +00:00

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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|--ignore-case]}} 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 {{[-f|--find]}} {{[-s|--size]}} {{2GB}} {{[-a|--algorithm]}} {{lz4}}`
- List currently initialized devices:
`sudo zramctl`