tree: ignore specific directories (#3837)

pages/linux/tree.md

@@ -2,15 +2,15 @@
 
 > Show the contents of the current directory as a tree.
 
-- Show files and directories up to 'num' levels of depth (where 1 means the current directory):
+- Print files and directories up to 'num' levels of depth (where 1 means the current directory):
 
 `tree -L {{num}}`
 
-- Show directories only:
+- Print directories only:
 
 `tree -d`
 
-- Show hidden files too:
+- Print hidden files too:
 
 `tree -a`
 
@@ -29,3 +29,7 @@
 - Ignore entries that match a wildcard (glob) pattern:
 
 `tree -I {{*.txt}}`
+
+- Print the tree ignoring the given directories:
+
+`tree -I '{{directory_name1|directory_name2}}'`