public/subjects/master-the-ls

Master the ls

Instructions

Put in a file master-the-ls, the command line that will:

• list the files and directories of the current directory.
• Ignore the hidden files, the "." and the "..".
• Separates the results with commas.
• Order them by ascending order of access time (the newest first).
• Have the directories ends with a /.

Hint

Here are some Commands that can help you:

• tr. Translate characters: run replacements based on single characters and character sets.For more information: https://www.gnu.org/software/coreutils/tr.

  • Replace all occurrences of a character in a file, and print the result: tr {{find_character}} {{replace_character}} < {{filename}}

• ls. List directory contents. For more information: https://www.gnu.org/software/coreutils/ls.

• sed. Edit text in a scriptable manner. You can see also: awk. For more information: https://www.gnu.org/software/sed/manual/sed.html.