Create file-operations.md

Author: lerndevops

linux/basics/file-operations.md

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+## file operations 
+
+### Create Files 
+```
+touch abc.txt -- creates a empty file 
+ls -l -- lists the contents in current directory
+
+```
+VI Editor 
+
+vi abc.txt -- creates & opens the file in read only mode if the file is not exist 
+
+	  to edit the file, press 'i' on keyboard for INSERT mode & then you can write anything
+	  once required text is entered press 'ESC' on keyboard to back readonly mode
+	  press ':wq' on keyboard -- to save & come out of the file
+    press ':q' on keyboard -- to come out of the file without saving
+		press ':wq!' on keyboard -- to save forcefully & come out of the file
+		press ':q!' on keyboard -- to come out of the file forcefully without saving
+	      ( note: vi is an file editor, you can use any editor you like by installing it on your machine )
+```
+
+### check / view the file contents 
+
+```
+cat abc.txt -- writes the content of file into terminal & exits 
+```
+```
+more abc.txt -- writes the content of file on terminal page by page ( to move to next page need to hit space bar on keyboard )
+```
+```
+less abc.txt -- open the file on terminal & can be read line by line (use arrows to scroll up & down) 		  
+	               
+   to 	comeout need to press 'q' on the key board
+```
+
+### remove the file(s)
+```
+rm abc.txt -- to remove a file 
+```
+