chmod: update placeholders in examples (#8300)

pages/common/chmod.md

@@ -5,32 +5,32 @@
 
 - Give the [u]ser who owns a file the right to e[x]ecute it:
 
-`chmod u+x {{file}}`
+`chmod u+x {{path/to/file}}`
 
 - Give the [u]ser rights to [r]ead and [w]rite to a file/directory:
 
-`chmod u+rw {{file_or_directory}}`
+`chmod u+rw {{path/to/file_or_directory}}`
 
 - Remove e[x]ecutable rights from the [g]roup:
 
-`chmod g-x {{file}}`
+`chmod g-x {{path/to/file}}`
 
 - Give [a]ll users rights to [r]ead and e[x]ecute:
 
-`chmod a+rx {{file}}`
+`chmod a+rx {{path/to/file}}`
 
 - Give [o]thers (not in the file owner's group) the same rights as the [g]roup:
 
-`chmod o=g {{file}}`
+`chmod o=g {{path/to/file}}`
 
 - Remove all rights from [o]thers:
 
-`chmod o= {{file}}`
+`chmod o= {{path/to/file}}`
 
 - Change permissions recursively giving [g]roup and [o]thers the ability to [w]rite:
 
-`chmod -R g+w,o+w {{directory}}`
+`chmod -R g+w,o+w {{path/to/directory}}`
 
 - Recursively give [a]ll users [r]ead permissions to files and e[X]ecute permissions to sub-directories within a directory:
 
-`chmod -R a+rX {{directory}}`
+`chmod -R a+rX {{path/to/directory}}`