diff --git a/.gitignore b/.gitignore
index 11042af..b6c7d88 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,5 +1,6 @@
 # gdb
 .gdb_history
+peda*.txt
 
 # Prerequisites
 *.d
diff --git a/README.md b/README.md
index 9b4f984..6f72215 100644
--- a/README.md
+++ b/README.md
@@ -4,4 +4,8 @@ A pwn learning repo containing multiple pwn program codes.
 ## Tutorials
 [Pwn学习总结（1）：工具篇](https://renjikai.com/pwn-learning-summary-1/)
 
-[Pwn学习总结（2）：ELF保护知识篇](https://renjikai.com/pwn-learning-summary-2/)
\ No newline at end of file
+[Pwn学习总结（2）：ELF保护知识篇](https://renjikai.com/pwn-learning-summary-2/)
+
+[Pwn学习总结（3）：gdb调试命令篇](https://renjikai.com/pwn-learning-summary-3/)
+
+[Pwn学习总结（4）：无保护的栈溢出](https://renjikai.com/pwn-learning-summary-4/)
\ No newline at end of file
diff --git a/stackoverflow/no-protection/peda-session-hello.txt b/stackoverflow/no-protection/peda-session-hello.txt
deleted file mode 100644
index 8f39891..0000000
--- a/stackoverflow/no-protection/peda-session-hello.txt
+++ /dev/null
@@ -1,2 +0,0 @@
-break SayHello
-