zramctl: add page (#1307)

pages/linux/zramctl.md

@@ -0,0 +1,20 @@
+# zramctl
+
+> Setup and control zram devices.
+> Use `mke2fs` or `mkswap` to format zram devices to partitions.
+
+- Check if zram is enabled:
+
+`lsmod | grep -i zram`
+
+- Enable zram with 2 devices. Use `zramctl` to configure the devices further:
+
+`sudo modprobe zram num_devices={{2}}`
+
+- Find and initialise the next free zram device to a 2GB virtual drive using lz4 compression:
+
+`sudo zramctl --find --size {{2GB}} --algorithm {{lz4}}`
+
+- List currently initialised devices:
+
+`zramctl`