add parallel

content/docs/parallel.md

@@ -0,0 +1,19 @@
+---
+title: "parallel"
+weight: 1
+# geekdocFlatSection: false
+# geekdocToc: 6
+# geekdocHidden: false
+---
+
+Easily execute commands per file
+
+parallel execution of command on each txt file
+```bash
+parallel commmand {} ::: *.txt
+```
+
+Execute command a single instance at a time -j 1
+```bash
+parallel -j 1 commmand {} ::: *.txt
+```