Running Complex Command with SUDO

Question

I need to run the following command with sudo (technically just the dd part of this command needs sudo):

xz -d -c -v nvme0n1.dd.xz | xdelta3 -e -9 < (dd if=/dev/nvme0n1 bs=1GB) nvme0n1.dd.xdelta

Usually when I need to run something like this with multiple pipes as sudo I simply pass it as a string to:

sudo bash -c "command"

But when I do that with this command I get the following error:

bash: Syntax error near unexpected token (

I tried escaping the brackets but when I do that I get:

bash: (dd no such file or directory

What's the best approach to run this command as sudo?

I don't think you can have whitespace between the < and ( in a bash process substitution - regardless of the use of sudo — steeldriver, Jan 11 at 23:15
What steeldriver just said. Also, I notice that your error messages have Bash capitalized rather than bash. This tells me you have modified the error messages. Please don't do that. We need to trust that what you show is exactly what you see. — Kusalananda♦, Jan 11 at 23:24

Harry Muscle · Accepted Answer · 2021-01-12 00:48:47Z

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As mentioned by steeldriver the issue was indeed the extra space between < and (.

answered Jan 12 at 0:48

Harry Muscle

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