Copy all the lines to clipboard

Use:

:%y+

to yank all lines.

Explanation:

% to refer the next command to work on all the lines

y to yank those lines

+ to copy to the system clipboard

NB: In Windows, + and * are equivalent see this answer.

You should yank the text to the * or + registers:

gg"*yG

Explanation:

gg to get the cursor to the first character of the file

"*y to start a yank command to the register * from the first line, until...

G to go the end of the file

on Mac

copy selected part: visually select text(type v or V in normal mode) and type :w !pbcopy

copy the whole file :%w !pbcopy

past from the clipboard :r !pbpaste

Another easy way to copy the entire file if you're having problems using VI, is just by typing "cat filename". It will echo the file to screen and then you can just scroll up and down and copy/paste.

The clipboard is buffer +. To copy to clipboard, do "+y and [movement].

So, gg"+yG will copy the whole file.

Similarly, to paste from clipboard, "+p

This is what I do to yank the whole file:

ggVGy

You can use "cat" command to open file and use mouse to copy

(in reply to @rshdev, and to avoid having to recompile vim with +xterm_clipboard per @nelstrom in comments on OP)

there's a program called xclip that works like putclip on Ubuntu 11:

:%!xclip -sel clip
u

it's not installed by default. to install, use:

sudo apt-get install xclip

On Ubuntu 12

you might try to install the vim-gnome package:

sudo apt-get install vim-gnome

I tried it, because vim --version told me that it would have the flag xterm_clipboard disabled (indicated by - ), which is needed in order to use the clipboard functionality.

-> installing the vim-gnome package on Ubuntu 12 also installed a console based version of vim, that has this option enabled (indicated by a + before the xterm_clipboard flag)

On Arch Linux

you may install vim-clipboard for the same reason.

If you run neovim then you should install xclip (as explained by help clipboard-tool)

you can press gg to locate your curser to the start of the file,then press yG to copy all the content from the start to end(G located) to buffer.good luck!

If you're using Vim in visual mode, the standard cut and paste keys also apply, at least with Windows.

CTRLA means "Mark the entire file.

CTRLC means "Copy the selection.

ESC means "De-select, so your next key press doesn't replace the entire file :-)

Under Ubuntu terminal (Gnome) at least, the standard copy also works (CTRLSHIFTC, although there doesn't appear to be a standard keyboard shortcut for select all (other than ALTE followed by A).

Do copy the whole file inside the vim or its tabs

y G 

then move to a tab and paste by

p

and to cut the whole file use

d G

:%y a Yanks all the content into vim's buffer, Pressing p in command mode will paste the yanked content after the line that your cursor is currently standing at.

gVim:

:set go=a

ggVG

See :help go-a:

'a' Autoselect:  If present, then whenever VISUAL mode is started,
 or the Visual area extended, Vim tries to become the owner of
 the windowing system's global selection.  This means that the
 Visually highlighted text is available for pasting into other
 applications as well as into Vim itself.  When the Visual mode
 ends, possibly due to an operation on the text, or when an
 application wants to paste the selection, the highlighted text
 is automatically yanked into the "* selection register.
 Thus the selection is still available for pasting into other
 applications after the VISUAL mode has ended.
     If not present, then Vim won't become the owner of the
 windowing system's global selection unless explicitly told to
 by a yank or delete operation for the "* register.
 The same applies to the modeless selection.

I tried a few of the commands that people have mentioned above. None worked. Then I got hold of the simplest of them all.

Step 1: vi <filename>
Step 2: Right click on the title bar of the Putty window
Step 3: Select "Clear scrollback" (to avoid copying the rest of your SSH session)
Step 4: Right click again and select "Copy all to clipboard".

There wasn't a concept of "clipboard" in Bill Joy's vi so I don't think there is a built-in way to do it.

gVim's automatic copy-anything-highlighted-to-the-clipboard feature is easiest or use an external program via :!

For Cygwin's vim I use

:%!putclip
u

Maybe Ubuntu has a CLI app like putclip??

Well, all of these approaches are interesting, however as lazy programmer I use yank all line by using combination of number + y

for example you have source code file with total of 78 lines, you can do as below:

gg to get cursor at first line insert 78 + y --> it yanks 78 lines below your cursor and current line

I have added the following line to my .vimrc

nnoremap <F5> :%y+<CR>

This allows me to copy all text in Vim to the clipboard by pressing F5 (in command mode).

If your fingers default to CTRL-A CTRL-C, then try the mappings from $VIMRUNTIME/mswin.vim.

" CTRL-C and CTRL-Insert are Copy
vnoremap <C-C> "+y

" CTRL-A is Select all
noremap <C-A> gggH<C-O>G
inoremap <C-A> <C-O>gg<C-O>gH<C-O>G
cnoremap <C-A> <C-C>gggH<C-O>G
onoremap <C-A> <C-C>gggH<C-O>G
snoremap <C-A> <C-C>gggH<C-O>G
xnoremap <C-A> <C-C>ggVG

I have them mapped to <Leader><C-a> and <Leader><C-c>.

Here's a map command to select all to the clipboard using CTRL+a:

"
" select all with control-a
"
nnoremap <C-a> ggmqvG"+y'q

Add it to your .vimrc and you're good to go...

I know ten years on this should be settled but the first two answers did not work for me so I kept digging. On a Redhat (remote server) - Windows 10 (local machine), if you cannot select the whole thing with a mouse, you are stuck because the usual copies do not work between the remote and the local machine clipboards.

So, to copy on the remote Linux and to paste on the local Windows, specify the primary buffer with the * and do a nice double yank

Use gg" * yy.

You can use a shortcur, like this one:

noremap <F6> :%y+<CR>

It means, when you push F6 in normald mode, it will copy the whole file, and add it to the clipboard. Or you just can type in normal mode :%y+ and then push Enter.

While many of the above answers are excellent, none of those solutions worked for me because I'm using the default VIM installation which came with Ubuntu 16.04, and it didn't have the clipboard option installed by default. I also wanted to paste the text into an external program.

Solution that worked: Ubuntu's default terminal allows you to highlight the entire contents by pressing Edit then Select All.

I have created a function to perform this action, place it on your ~/.vimrc.

fun! CopyBufferToClipboard()
    %y+
endfun
nnoremap <Leader>y :call CopyBufferToClipboard()<CR>
command! -nargs=0 CopyFile :call CopyBufferToClipboard()

OBS: If you are using neovim you also need some clipboard manager like xclip. for more information type in neovim :h checkhealth

It is also important to mention that not always a simple y will copy to the clipboard, in order to make every copy feed + wich is "Clipboard Register" try to set: :set clipboard=unnamed,unnamedplus. For mor information see: :h unnamed.

Here more information on vim wikia.

I use Vim in PowerShell and when I needed to copy a short block of code to windows clipboard;

I use :set nonumber to remove line numbers, then select the code visually with cursor and right click. Then I paste it to where ever I want with Ctrl + V.

I couldn't copy files using the answers above but I have putty and I found a workaround on Quora.

Change settings of your PuTTY session, go to logging and change it to "printable characters". Set the log file Do a cat of the respective file Go to the file you set in step #1 and you will have your content in the log file.

Note: it copies all the printed characters of that session to the log file, so it will get big eventually. In that case, delete the log file and cat the target file so you get that particular file's content copied on your machine.

Click the left mouse button, drag across the section you want to copy and release. The code automatically gets copied to clipboard.