Supplemental NOTE: The set instruction can set the execution mode of the shell used, and can be set according to different requirements.
Parameters: -A indicates the modified variable for output to the environment variable. -B causes the aborted daemon to immediately return the execution status. The file produced by-C has failed to overwrite the existing file. The-D shell preset uses instructions used in hash table memory to speed up instruction execution. Use the-D argument to cancel. -e If the instruction returns a value that is not equal to 0, exit the shell immediately. -F cancels the use of wildcard characters. -H automatically records the location of the function. -H Shell can use "!" Add < instruction number > to execute the instructions recorded in history. The parameters given by the-K directive are treated as environment variables for this instruction. -L records the name of the variable for the loop. -M uses monitoring mode. -N reads only the instruction without actually executing it. -P starts the precedence mode. -P starts the-p parameter, and when the instruction is executed, it replaces the symbolic connection with the actual file or directory. -T to exit the shell after executing the subsequent instruction. -U displays an error message when executing with a variable that is not defined. -V Displays the input values that the shell reads. When-X executes the instruction, it first displays the instruction and the parameters under it. +< parameter > Cancels a set-initiated parameter.
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