diff --git a/linux/findreplaceinfiles.txt b/linux/findreplaceinfiles.txt
new file mode 100644
index 0000000..b45cb76
--- /dev/null
+++ b/linux/findreplaceinfiles.txt
@@ -0,0 +1,7 @@
+# with perl
+perl -pi -w -e s/apt/APT/g file.sh
+perl -pi -w -e s/.jpg/.jpg.webp/g file.sh
+# with sed
+
+sed -i 's/SEARCH_FOR/REPLACE_WITH/g' file.txt
+