shc:tldr:b85c7

The command shc -f ${script} -e ${dd-mm-yyyy} is used to compile and encrypt a Shell script file (${script}) so that it can be executed without revealing its source code.

Here's what each part of the command does:

• shc: The command that invokes the shell script compiler.
• -f ${script}: Specifies the input file to be compiled and encrypted. ${script} represents a variable that should be replaced with the actual path or filename of the script you want to compile and encrypt.
• -e ${dd-mm-yyyy}: Specifies an expiration date for the compiled script. ${dd-mm-yyyy} represents a variable that should be replaced with a specific expiration date in the format DD-MM-YYYY. After this date, the compiled script will not execute.

By running this command, the specified Shell script will be compiled into a binary executable, making it more difficult for someone to modify or reverse-engineer the original script. Additionally, the encryption and expiration date provide an additional layer of protection to control the usage and access to the script.