====== Ubuntu - Disk - Ramdisk - Create a Ramdisk ======

===== Create a Ramdisk =====

<code bash>
mkdir /mnt/ramdisk
mount -t tmpfs -o rw,size=240G tmpfs /mnt/ramdisk
</code>

<WRAP info>
**NOTE:**  This mounts a ramdisk with 240GB under the path /mnt/ramdisk.

  * **-t tmpfs**:  
    * tmpfs only uses memory when you it contains files.
    * When it is empty, it will take almost no space in RAM.

  * An alternative to **tmpfs** is to use **ramfs**.
    * tmpfs can use swap as well, whereas ramfs devices are memory only.

</WRAP>

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===== Verify the Ramdisk =====

Verify that the RAMDISK has been created.

<code bash>
df -h
</code>

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===== Mount the Ramdisk automatically on system boot =====

Edit /etc/fstab, and add the following line to the the end of the file.

<file bash /etc/fstab>
tmpfs  /mnt/ramdisk  tmpfs  rw,size=240G  0   0
</file>

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