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jello:tldr:00951
The command "cat ${file-json} | jello" is a Unix/Linux command that involves two different commands: "cat" and "jello", connected through a pipe "|" symbol.
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"cat" command: The "cat" command is short for "concatenate", and its purpose is to display the contents of one or more files on the terminal. In this command, the variable "${file-json}" is passed as an argument to the "cat" command. The "${file-json}" is likely a placeholder for the actual name of a JSON file.
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"|" (Pipe) symbol: The pipe symbol "|" is used to redirect the output of one command as the input to another command. It connects the output of the preceding command ("cat ${file-json}") to the standard input of the following command ("jello").
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"jello" command: The "jello" command is not a standard Unix/Linux command. It's possible that it is a custom or user-defined command that operates on the input received from the "cat" command. Without further information about the "jello" command, it is difficult to determine its exact function or purpose.