Merge pull request #148 from felixonmars/free

add free.md

pages/linux/free.md

@@ -0,0 +1,19 @@
+# free
+
+> Display amount of free and used memory in the system
+
+- Display system memory
+
+`free`
+
+- Display memory in Bytes/KB/MB/GB
+
+`free {{-b/-k/-m/-g}}`
+
+- Display memory in human readable units
+
+`free -h`
+
+- Continuous monitor memory (refresh every X seconds)
+
+`free -s {{X}}`