Update linux.md (#1681)

New command for newbies

linux.md

@@ -2,6 +2,49 @@
 title: Linux
 ---
 
+### Read/Write/Execute a file
+
+    $ chmod +rwx App
+    $ ./App
+
+### Remove
+
+    $ rm namefile
+    $ rm -d Directory
+    $ rm -rf Directory_with_files
+
+### Copy file to a folder
+
+    $ cp namefile Downloads
+    $ ls
+    namefile  Desktop  Documents  Downloads  Music  Pictures  Public  Templates  Videos
+    $ cd Downloads
+    ~/Downloads$ ls
+    namefile
+
+
+### Create empty file
+
+    $ touch namefile
+    $ touch --help
+
+### Show in the terminal the file
+
+    $ cat namefile
+    $ cat --help
+
+
+### Create new directory
+
+    $ mkdir name
+    $ mkdir --help
+
+### list files from directory
+
+    $ ls
+    Desktop  Documents  Downloads  Music  Pictures  Public  Templates  Videos
+    $ ls --help
+
 ### Mounting a RAM drive
 
     $ mount -t tmpfs -o size=5G,nr_inodes=5k,mode=700 tmpfs /tmp