Vim setting, vimrc and vim buffer is done

buffer-tut.txt

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+Buffer
+----------
+
+Defination: It is the in-memory defination of a file.
+	    It represent the content of the file by 
+	    storing it inside memory.
+
+Opening multipe files in Vim.
+
+* From terminal
+   vim <file-1> <file-2> ....
+
+
+* Shell expansion shortcuts:
+   vim file*
+
+   This will open all the file which follow pattern
+   in their file name that is mentioned as an argument
+   here. 
+
+* To see all the open buffers:
+
+   Use commands: :buffers
+
+* To know more on buffers:
+
+   Use commands: :h :buffers
+
+* To change the buffer to another opened file
+
+   :buffer <buffer number>
+   :buffer <filename>
+
+   Note : Instead of :buffer, we can use :b.
+
+* To open to the next buffer of the current opened buffer.
+
+   We can use: :bnext or :bn
+   
+   To do this in opposite direction we can use:
+
+   :bprevious or :bp
+
+* To go to the first buffer.
+
+   :bfirst or :bf
+
+* To go the last buffer.
+
+   :blast or :bl
+
+* Shortcut key-binding to move to the previously editing buffer.
+
+   CTRL + ^
+
+* The %a and # symbol meaning.
+
+   %a : Represent the active buffer and currently loaded.
+   #  : Represent the previously editing buffer.
+
+* Another way to move back to the alternate buffer.
+
+   :b#
+
+%% TIPS %%
+
+When we try to do the editing on the current buffer and check the 
+buffer list.
+It will present a '+' indicating that the editing done is not saved.
+And when we try to change the buffer, it wil throw error.
+
+We can still force to change the buffer by using '!'.
+
+------------------------------
+
+There are three states of buffer.
+
+-> Active state and showing the buffer.
+
+-> Inactive state and not shown in the buffer.
+
+-> Inactive state but in the memory. (#h +)
+
+
+* To allow the buffer to be hidden without writing it into the file.
+  We can use option:
+   :set hidden
+
+   This allow to edit multiple buffer without necessarily writing it.
+
+* To abandone all the changes of all the buffer.
+
+   :qall!
+
+* To save all the changes of all the buffer.
+
+   :wall
+
+* To open another file without switching to that new window of the same file.
+
+   :badd <filename>
+
+* To unload a currently active buffer.
+
+   :bdelete or :bd <name or number> -> This is optional if the buffer is not the current active file.
+
+* To delete range of buffer.
+
+   :<start-number>,<end-number>bd
+
+   and 
+  To delete all the buffer.
+   :%bd
+
+* To execute a line command on each and every buffer.
+
+   :bufdo set <option>
+   :bufdo ....
+
+* To execute multiple line command in line-command mode.
+
+   We can use '|' symbol.
+
+----------------------------------------------------------------------
+
+
+Explore
+--------
+
+Command: :Explore or :E
+
+It is file explorer CLI which allow to navigate directory and open any file in the buffer.
+This CLI like look also a special buffer which we can delete using :bd command.

vim-commands.txt

@@ -850,3 +850,4 @@ Line mode:
 	right  -> right aligned. (ri)
 
 	We can use short-hand version as well.
+

vimrc-tut.txt

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+vimrc
+--------------
+
+* rc = run commands
+* System-wide vimrc and personal vimrc
+* Unix/Linux/Mac: ~/.vimrc
+* Windows: $HOME/_vimrc
+* Each line is executed as a command.
+
+   set ruler = :set ruler
+
+      vimrc      line command
+
+
+
+%% TIPS %%
+
+ * If we use :set line-cmd, it will display all the option
+   which have value other than the default value are displayed.
+
+ * To revert a option back to its default value, we can use:
+      :set <option>&
+
+ * To open and edit a file, while the vim is already running,
+   we can use:
+      :e <filename>
+ 
+ * To see the full path of the current working file in vim, we
+   can use <num> + CTRL + g.
+
+      where <num> > 0. 
+
+ * To list all the option we can use to set in .vimrc file can done
+   using:
+
+      :h option-list
+
+      Note: There are total 379 option that we can set.
+
+      Another way to view the option is by using:
+
+      :option
+
+
+* To get to know about different type of color-scheme
+  we can use:
+
+  :color<space> + CTRL + d
+
+* After downloading the colorscheme.
+
+  We can put it in the directory:
+
+  /home/<user>/.vim/colors -> Linux
+  /Users/<user>/.vim/colors -> Mac
+
+
+* To map some keystrokes with a particular key (Just like a snippet)
+
+  we use:
+
+  map <KEY> <KEYSTROKES>
+
+
+* To execute a command written in a file.
+
+  we will use:
+
+  :source <filename>
+
+  For ex:
+
+  :source .vimrc
+
+
+* Vim has lot of Key-binding having a specific command to execute.
+
+  To define a namespace kind of a thing for specific key-binding
+  to execute certain commands we can use mapleader concept.
+
+  By default mapleader key is "\"
+
+  This can be changed by using
+  let mapleader="<key>"
+
+
+  then using it like
+
+  map <leader>w :w!<CR>
+
+  map <leader>key <keystrokes>
+
+  To see the current mapping of keys we can use command:
+
+  :mapping