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Top Forums Shell Programming and Scripting How to prepend filename to its content without a third file? Post 302972782 by Don Cragun on Tuesday 10th of May 2016 08:02:32 PM
Old 05-10-2016
If you know vim, you know a lot more about ed than you think you do.

If you're in vim and you type in the command:
Code:
:1i

and then type in the two lines:
Code:
geneID  filename
.

What will happen. (It will insert the text geneID filename as a new line of text that will appear before the 1st line that was in the file before.)

And then what happens if you type in the command:
Code:
:w

(It will write the updated buffer back to the file you are editing.)

The ed (and ex) utilities give you most of the commands that you type into vim that start with a colon, but do not need (or accept) the colon.
This User Gave Thanks to Don Cragun For This Post:
 

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EVIM(1) 						      General Commands Manual							   EVIM(1)

NAME
evim - easy Vim, edit a file with Vim and setup for modeless editing SYNOPSIS
evim [options] [file ..] eview DESCRIPTION
eVim starts Vim and sets options to make it behave like a modeless editor. This is still Vim but used as a point-and-click editor. This feels a lot like using Notepad on MS-Windows. eVim will always run in the GUI, to enable the use of menus and toolbar. Only to be used for people who really can't work with Vim in the normal way. Editing will be much less efficient. eview is the same, but starts in read-only mode. It works just like evim -R. See vim(1) for details about Vim, options, etc. The 'insertmode' option is set to be able to type text directly. Mappings are setup to make Copy and Paste work with the MS-Windows keys. CTRL-X cuts text, CTRL-C copies text and CTRL-V pastes text. Use CTRL-Q to obtain the original meaning of CTRL-V. OPTIONS
See vim(1). FILES
/usr/local/lib/vim/evim.vim The script loaded to initialize eVim. AKA
Also Known As "Vim for gumbies". When using evim you are expected to take a handkerchief, make a knot in each corner and wear it on your head. SEE ALSO
vim(1) AUTHOR
Most of Vim was made by Bram Moolenaar, with a lot of help from others. See the Help/Credits menu. 2002 February 16 EVIM(1)
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