dd:tldr:50378

dd: Generate a system backup into an IMG file.

$ dd if=${-dev-drive_device} of=${filename-img}

try on your machine

The dd command is a commonly used command-line utility in Unix-like operating systems for copying and converting files and disk images.

Let's break down the given command:

if=${-dev-drive_device}: This specifies the input file or device to read from. The value of ${-dev-drive_device} is a variable or parameter that should be replaced with the actual input device or file. It represents the source from which data will be read.
of=${filename-img}: This specifies the output file or device to write to. Similarly, ${filename-img} is a variable or parameter that needs to be replaced with the actual output filename. It represents the destination to which data will be copied.

In summary, the dd command will read data from the input device or file specified by ${-dev-drive_device} and write it to the output file or device specified by ${filename-img}.

This explanation was created by an AI. In most cases those are correct. But please always be careful and never run a command you are not sure if it is safe.

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