Question

Keep Receiving Message: Invalid Option

Posted October 7, 2014 2.8k views

I am trying to use the command fallocate to create a swapfile for memory purposes. Every time I use the command: sudo fallocate -1 2G /swapfile, the message I get back is: fallocate: invalid option – ‘1’.

How do I resolve this problem?

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2 answers
kamaln7 October 7, 2014

Replace -1 with -l (a lowercase L):

       -l, --length length
              Specifies the length of the allocation, in bytes.

So the command should be:

sudo fallocate -l 2G /swapfile
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alexdo November 30, 2020

Hello, all

You can follow the steps on how to do that here:

https://www.digitalocean.com/community/tutorials/how-to-add-swap-space-on-ubuntu-20-04

Hope that this helps!
Regards,
Alex

How To Add Swap Space on Ubuntu 20.04
by Brian Boucheron
One way to guard against out-of-memory errors in applications is to add some swap space to your server. In this guide, we will cover how to add a swap file to an Ubuntu 20.04 server.
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