ls, touch: add examples (#5855)

pages/common/ls.md

@@ -30,3 +30,7 @@
 - Long format list of all files, sorted by modification date (oldest first):
 
 `ls -ltr`
+
+- Only list directories:
+
+`ls -d {{*/}}`

pages/common/touch.md

@@ -14,3 +14,7 @@
 - Use the times from a file to set the times on a second file:
 
 `touch -r {{filename}} {{filename2}}`
+
+- Create multiple files:
+
+`touch {{file{1,2,3}.txt}}`