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patch:tldr:09e88

patch: Apply the reverse of a patch.

patch

$ patch -R < ${patch-diff}

try on your machine

The command "patch -R < ${patch-diff}" is used to apply a reverse patch to a file using the 'patch' utility.

Here is an explanation of each part of the command:

"patch": This is the name of the command/utility that is being executed.
"-R": This option tells 'patch' to reverse the patch. In other words, it undoes the changes made by a previous patch operation.
"< ${patch-diff}": This part of the command redirects the patch contents from the file referenced by the variable "${patch-diff}" into the 'patch' command. The "${patch-diff}" variable likely contains the file path or name of the patch file that you want to apply in reverse.

Overall, the command takes the reverse patch file specified by the "${patch-diff}" variable and applies it in reverse, effectively undoing the changes made by a previous patch.

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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