diff --git a/knowledge base/find.md b/knowledge base/find.md
index 9c0d7a7..753d322 100644
--- a/knowledge base/find.md	
+++ b/knowledge base/find.md	
@@ -84,7 +84,7 @@ Accepted time information:
 - `c` for the time of last change of file status information (creation)
 - `m` for the file's last modification time
 - `B` for the file's inode creation time
-  
+
 With the `-Xmin` form, times are rounded up to the next full **minute**. This is the same as using `-Xtime Nm`.
 
 With the `-Xtime` form, times depend on the given unit; if no unit is given, it defaults to full 24 hours periods (days).  
diff --git a/knowledge base/git.md b/knowledge base/git.md
index d104b47..241baa9 100644
--- a/knowledge base/git.md	
+++ b/knowledge base/git.md	
@@ -89,6 +89,9 @@ git config user.name "user name"
 git config user.email user.email@mail.com
 git commit --amend --reset-author
 
+# Sign the last commit.
+git commit --amend --no-edit --gpg-sign
+
 # Show commits which would be pushed.
 git log @{u}..