Add linux pipes to documentation

.all-contributorsrc

@@ -396,6 +396,15 @@
       "contributions": [
         "code"
       ]
+    },
+    {
+      "login": "relativvv",
+      "name": "Robin Schulte",
+      "avatar_url": "https://avatars.githubusercontent.com/u/52501124?s=400&u=65c9b54a550063e6bd3b4fb36f0ed7c9ac80bde5&v=4",
+      "profile": "https://github.com/relativvv",
+      "contributions": [
+        "code"
+      ]
     }
   ],
   "contributorsPerLine": 7,

LINUX/Basic_Command

@@ -81,6 +81,21 @@ COPY/RENAME/MOVE/OPERATION
 
 ---
 
+##Linux pipes
+
+    cat test.txt | grep 'searchkey' ---> Only gives lines from that file thant contains the key in ''
+
+    cat test.txt | less ---> Prints out file content, but you have the possibility to scroll
+                             Quit the reading with 'q'
+
+    cat test.txt | uniq ---> This will sort the given file and print the unique values only.
+
+    cat test.txt | head -4 ---> Only prints out the last 4 lines of the command before the pipe, you can specify any number you want
+
+    ls | wc -l ---> prints out the linenumber of the command before the pipe
+
+---
+
 ##PERMISSION
 
 Observe the output of ls:

README.md

@@ -163,6 +163,7 @@ Thanks goes to these wonderful people ([emoji key](https://allcontributors.org/d
   </tr>
   <tr>
     <td align="center"><a href="https://github.com/darostegui"><img src="https://avatars.githubusercontent.com/u/61184284?v=4?s=100" width="100px;" alt=""/><br /><sub><b>Diego Arostegui</b></sub></a><br /><a href="https://github.com/Tikam02/DevOps-Guide/commits?author=darostegui" title="Code">💻</a></td>
+    <td align="center"><a href="https://github.com/relativvv"><img src="https://avatars.githubusercontent.com/u/52501124?s=400&u=65c9b54a550063e6bd3b4fb36f0ed7c9ac80bde5&v=4" alt=""/><br /><sub><b>relativvv</b></sub></a><br /><a href="https://github.com/relativvv/DevOps-Guide/commits?author=relativvv" title="Code">💻</a></td>
   </tr>
 </table>