Answer :
The command that can be used to provide a long listing for each file in a directory is 1s command.
The ls command outputs whatever additional information you request with the flags together with the contents of each specified Directory or the name of each specified File. The ls command shows the contents of the current directory if you do not provide a File or Directory.
The ls command presents all information by default in alphabetical order by file name. With the exception of dot (.) and dot dot, the command utilizes the -A flag by default when run by a user with root authority. Use the ls -a command to display all file entries, even those that start with a dot (.).
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