coreutils commands: move pages to common/ folder (#2442)

pages/common/sort.md

@@ -21,3 +21,7 @@
 - Sort a file preserving only unique lines:
 
 `sort -u {{filename}}`
+
+- Sort human-readable numbers (in this case the 5th field of `ls -lh`):
+
+`ls -lh | sort -h -k 5`

pages/linux/sort.md

@@ -1,23 +0,0 @@
-# sort
-
-> Sort lines of text files.
-
-- Sort a file in ascending order:
-
-`sort {{filename}}`
-
-- Sort a file in descending order:
-
-`sort -r {{filename}}`
-
-- Sort a file using numeric rather than alphabetic order:
-
-`sort -n {{filename}}`
-
-- Sort the passwd file by the 3rd field, numerically:
-
-`sort -t: -k 3n /etc/passwd`
-
-- Sort human-readable numbers (in this case the 5th field of `ls -lh`):
-
-`ls -lh | sort -h -k 5`