How to reverse file and folder listings in Linux

Directory listings become easier to scan when the entries that usually fall at the bottom need attention first. In Linux, ls -r reverses the active sort order, so a name-sorted view can show descending names and a time-sorted view can show the oldest entries first without changing files or directories.

The default ls order is name sorting under the current locale. Adding -1 prints one entry per line, while -r flips the order that ls would otherwise produce. That makes a before-and-after check easy in terminals, scripts, and handoff notes.

Reverse sorting only works when sorting is enabled. -U or --sort=none prints directory entries in storage order and leaves -r with nothing to reverse; use the default name sort or a specific sort key such as -t when the order must be predictable.

1. List the target directory in default name order.

   $ ls -1 /srv/reverse-demo
   alpha.txt
   archive
   logs
   zulu.txt

   -1 prints one entry per line so the ordering is easy to compare.

2. Reverse the default name sort.

   $ ls -1r /srv/reverse-demo
   zulu.txt
   logs
   archive
   alpha.txt

   -r reverses the active sort key; with the default name sort, the entries appear in reverse alphabetical order.

3. List entries by modification time when timestamp order matters.

   $ ls -lt --time-style=long-iso /srv/reverse-demo
   total 16
   -rw-r--r-- 1 root root   40 2026-04-14 09:03 zulu.txt
   drwxr-xr-x 2 root root 4096 2026-04-14 09:02 logs
   drwxr-xr-x 2 root root 4096 2026-04-14 09:01 archive
   -rw-r--r-- 1 root root    6 2026-04-14 09:00 alpha.txt

   -t sorts by modification time, newest first.

4. Reverse the time sort to show the oldest entries first.

   $ ls -ltr --time-style=long-iso /srv/reverse-demo
   total 16
   -rw-r--r-- 1 root root    6 2026-04-14 09:00 alpha.txt
   drwxr-xr-x 2 root root 4096 2026-04-14 09:01 archive
   drwxr-xr-x 2 root root 4096 2026-04-14 09:02 logs
   -rw-r--r-- 1 root root   40 2026-04-14 09:03 zulu.txt

   -r flips the -t result, so the oldest modified entry appears first.

5. Force bytewise name ordering when a script or comparison must produce the same order across hosts.

   $ LC_ALL=C ls -1r /srv/reverse-demo
   zulu.txt
   logs
   archive
   alpha.txt

   LC_ALL=C avoids language-specific collation differences for this command only.

6. Skip unsorted mode when the output must be reversed.

   -U and --sort=none disable sorting, so -r has no effect. Keep sorting enabled with the default name order, -t, -S, -X, or another supported sort key before reversing the listing.