159

When I tried to use arrow keys in insert mode in vi editor the following characters are being inserted in the editor:

  • for I get B,
  • for I get A,
  • for I get D,
  • for I get C.

Please help me in resolve this problem.

  • 2
    I had a good laugh reading the title ;) I'm sure there is an XKCD for the spooky feeling that comes (to novice users) when arrow key prints letters. – vvy Jun 11 '15 at 14:31

14 Answers 14

203

If you don't already have a .vimrc file in your home directory, create one using this:

vim ~/.vimrc

Add this line to the top of the file:

set nocompatible

Save the file and this should fix the problem for you. :)

  • 1
    I had to create a .exrc file for vi, but set nocompatible worked great. – tgun926 Jan 30 '15 at 23:38
  • 18
    There is a trick if you use vi instead of vim, you have to do the same configuration but in the ~/.exrc file. – tzi Jul 22 '15 at 14:47
  • 13
    Worked. But why this fix is required? Why by default it does not handle arrows? – Mohit Jan 23 '16 at 12:41
  • 5
    By default, vi/vim is programmed to replace arrow keys with the keys h, j, k, l. This is done so you dont have to move from the major key area of the keyboard. – Gaurav Manchanda Jan 24 '16 at 19:34
  • 8
    next problem is backspace, solution: askubuntu.com/questions/296385/… – daVe Sep 27 '16 at 13:15
66

Install vim -> This will fix the problem.

sudo apt-get install vim

There are many good vim/vi tutorials on youtube, or the web generally. For your problem, see here

Then continue to open files as usual:

vi desired-file
  • worked for me -- though not sure why this is different from the vim I was launching previously – Amos Folarin Jan 9 '17 at 13:49
  • 4
    This should be the accepted answer (but seems like no one is accepting). it's the simplest/cleanest way to get vim fully 'modernized' to a computer console (instead of tty/ANSI era terminals. – Lockszmith Aug 1 '17 at 1:15
  • yes I agree with you Lockzsmith, this should'v been the accepted answer – niccolo m. Sep 28 '17 at 23:12
  • This worked for me. I'm surprised that raspian comes with the version of vi/vim that it does... although all the tutorials for it tell you to use nano, which it's hard to argue that vim is really better than it. Probably the only reason I use vim rather than nano is because vim is always on every machine and it seems like a 50/50 chance whether nano is. – ArtOfWarfare Jan 20 '18 at 17:15
  • BLEEPIN' COMPUTER! – Chris Jan 24 at 15:54
26

With vi, when clicking on i you activate the command to Insert text.
This command allows you to insert text in your file.
And right, when clicking :

  • on it will insert a "A",
  • on it will insert a "B",
  • ...

Till you deactivate this command.
To deactivate a command in vi : just click on Esc
And then you will get back normal use of your arrow keys:

  • to go up,
  • to go down,
  • ...

FYI, here are some vi commands:
From this source.

:xReturn quit vi, writing out modified file to file named in original invocation
:wqReturn quit vi, writing out modified file to file named in original invocation
:qReturn quit (or exit) vi
:q!Return quit vi even though latest changes have not been saved for this vi call

move cursor down one line
move cursor up one line
move cursor left one character
move cursor right one character

u undo whatever you just did; a simple toggle
. redo whatever you just did

i insert text before cursor, until Esc hit
I insert text at beginning of current line, until Esc hit
a append text after cursor, until Esc hit
A append text to end of current line, until Esc hit
o open and put text in a new line below current line, until Esc hit
O open and put text in a new line above current line, until Esc hit

r replace single character under cursor (no Esc needed)
cw change the current word with new text,starting with the character under cursor, until Esc hit
x delete single character under cursor
Nx delete N characters, starting with character under cursor
dw delete the single word beginning with character under cursor
C change (replace) the characters in the current line, until Esc hit
D delete the remainder of the line, starting with current cursor position

dd delete entire current line
Ndd delete N lines, beginning with the current line; e.g., 5dd deletes 5 lines
yy copy (yank, cut) the current line into the buffer
Nyy copy (yank, cut) the next N lines, including the current line, into the buffer
p paste the line(s) in the buffer into the text after the current line

0 (zero) move cursor to start of current line (the one with the cursor)
$ move cursor to end of current line
w move cursor to beginning of next word
b move cursor back to beginning of preceding word
:0Return or 1G move cursor to first line in file
:nReturn or nG move cursor to line n
:$Return or G move cursor to last line in file

/string search forward for occurrence of string in text
?string search backward for occurrence of string in text
n move to next occurrence of search string
N move to next occurrence of search string in opposite direction

  • 25
    Arrow key down inserting "B" is not an expected behavior. Arrow keys should be moving cursors up and down/ left and right regardless of the insert mode. – James Wong Sep 6 '15 at 7:49
  • 2
    @JamesWong Actually, it is expected behavior, as that is how Vi was originally programmed. VIM, (unofficially) the successor to Vi, is in Vi-compatible mode by default, which includes this behavior for the arrow keys. So the word "should" here is merely subjective, as VIM is actually doing what it was purposefully programmed to do. – villapx Dec 1 '16 at 15:30
  • @villapx - No, it isn't expected behavior. Expected behavior is defined by what your typical user expects. The typical person using vi/vim is using it because that's what's installed on a server that they need to quickly configure and they won't be doing enough to bother with installing something else. Few actually choose to use vim when given an option, and fewer actually know all these features or quirks. The typical user expects arrows to move the cursor - that is the expected behavior. Anything else is unexpected behavior, and should be written up as a bug for how unexpected it is. – ArtOfWarfare Jan 20 '18 at 17:13
  • @ArtOfWarfare You're free to define "expected" however you choose. I'm defining it as what's expected by the author of the code, as they were quite clear in the VIM manual how this is supposed to behave...from :help compatible: "By default this option is on and the Vi defaults are used for the options. This default was chosen for those people who want to use Vim just like Vi, and don't even (want to) know about the 'compatible' option." – villapx Jan 22 '18 at 20:43
  • @ArtOfWarfare Basically, the VIM author clearly had a specific audience in mind when writing this portion of the code, and just because that audience is different from what your audience would be, doesn't mean it's a bug. You can file it as a bug if you wish, but be prepared to be berated by VIM fundamentalists (and really anyone who respects the 'manual', a la RTFM aficionados). – villapx Jan 22 '18 at 20:45
16

To disable printing letters on pressing arrows in edit mode you can do following

vi $HOME/.exrc 

(create file if it does not exist) and then add line set nocompatible to it and save.

  • 2
    This should be the accepted answer. Thank you! – eis Nov 18 '15 at 10:10
  • I put that in .vimrc. Why do you put it in .exrc? – pauljohn32 Mar 19 '17 at 2:54
  • Vim sources both - see output of :version for load order (also :h .exrc or :h init). I suppose someone might want a setting to apply in both vi and vim, or could be sheer force of habit. – William Robertson May 27 '17 at 8:46
11

There are three modes in vi editor namely:

  • command mode
  • input mode
  • default mode.

When youu open a file, you are in default mode. Now if you want to go to a specific position in your text, just use arrow keys or use h, j, k, l keys. Note that this would work only when you have not pressed i (or any other input mode entering command like a, A, I).

The reason for 'B' may be because the arrow keys in input mode don't function as arrow keys, so just press Esc to go into default mode any time. When to shift to input mode press i or a, and to navigate just press i key and use arrow keys or h, j, k, l.

6

I had the exact same Problem but not only on my local machine but also on connections via putty on a sles machine in a Win7 VM over a citrix receiver. Both the local host and the remote hosts show after a reinstall of Ubuntu had the exact same problem.

After finding out that

$ localectl list-keymaps 
Couldn't find any console keymaps.

Causes this strange VI behaviour I installed the package console-data which solves the issue!

sudo apt-get install console-data
3

All the explanations given are a bit bizarre. I have vi but not vim installed.

Checking alternatives: /etc/alternatives/vi/usr/bin/vim.tiny

So vi is vim.tiny, and it uses /etc/vim/vimrc.tiny.

And in vimrc.tiny you find the following line:

set compatible

Which is almost the only thing in this file. Note that in /etc/vim/vimrc it is using nocompatible.

So either install vim, or change the vimrc.tiny file, or create your own ~/.vimrc which should contain the line:

set nocompatible
  • 1
    I'm not sure what's so bizarre. You end up suggesting 1. install Vim - askubuntu.com/a/220072/158442, 2. creating ~/.vimrc and setting nocompatible: askubuntu.com/a/353944/158442, or 3. editing a system file. Only the suggestion to edit /etc/vim/vimrc.tiny is new, and yet you call answers bizarre while suggesting the same thing as them. – muru Jan 11 '17 at 2:27
2

Note:

There is good information in the other posts but none of the posts tried to explain why this behavior happened. Many people are bound to stumble on this in the future. Also, could you mark this question as resolved since any of the previous posts likely assisted you?


Here is an explanation:

Vi is an editor that's been around a long while, with roots back to the Unix systems. It's a good tool but it has been iterated on and now there is better. Vim was written later and is that iteration. People commonly refer to vi as 'vim-minimal' and to vim is an "improved" version of vi. You can think of it like this: vi is the core and vim expands on it.

Likely how you discovered the behavior:

In order for you to have discovered this problem, you pressed "i" to enter into insert mode and then used your arrow keys to navigate the correct line and edit point. This is what caused your unexpected char issue.

Solution 1 or 2

1) vi someFile While using vi, first move to the edit point, then enter into insert mode.

2) vim someFile Simply use vim from the start.

I cannot stress enough to read the manual (man pages) or to use -h for help. Once you adjust to the patterns in the shell, man pages become your best friend. Example: man vi or man vim


Validate that Vim is installed.

Open a console window and execute:

dpkg --list | grep vim

If you get something similar to this, then you can just start using vim.

~ $ dpkg --list | grep vim
ii  vim         2:7.4.052-1ubuntu3  amd64  Vi IMproved - enhanced vi editor
ii  vim-common  2:7.4.052-1ubuntu3  amd64  Vi IMproved - Common files
ii  vim-runtime 2:7.4.052-1ubuntu3  all    Vi IMproved - Runtime files
ii  vim-tiny    2:7.4.052-1ubuntu3  amd64  Vi IMproved - enhanced vi editor - compact version

If the command prompt returns with nothing, then vim is is not installed. Use the below examples to update your repositories and then install vim.

sudo apt-get update
sudo apt-get install vim

On the off chance that you use vi or vim only when searching on the internet how to fix something and you happen to forget to type vim, there is one way that you can fix it for the future. I caution you to pay attention. You can use an alias to overwrite vi with a reference to vim so that no matter what you type in the infrequent future, you get vim without that "oops!" moment. You can always delete an alias later.

Type vim .bashrc. Move down to the empty line with only a ~ (or to any other line that starts with alias (so they're grouped together) and then press the i key to enter -insert- mode. On its own separate line, enter the following:

alias vi='vim'

Press Esc and then type :wq. Now you need to reload the file. Type source .bashrc Any other shell that opens after you have made these edits will automatically load the .bashrc file.

1

The traditional vi editor doesn't recognize the arrow keys (...afair). There are two solutions:

  1. use vim instead of vi
  2. use h, j, k and l to navigate (you can't navigate while editing on the traditional vi btw.)
  • This isn't true. Look for terminfo/termcap and libcurses based apps. I use vi since 1990 in Xenix, SCO Unix, AIX, old hpux, and others, and pure-vi from 80s already have support to terminfo/termcap mappings. – Luciano Dec 14 '15 at 11:42
  • @james-wong well then I should rephrase my answer. To "pure vi under Ubuntu doesn't..." – MadMike Dec 14 '15 at 14:52
  • ... and this was meant as a comment to @luciano – MadMike Dec 14 '15 at 14:53
1

This can also be due to the TERM variable; set it for example like this:

 export TERM=xterm
  • This solved the problem for me where the other answers didn't. Thanks! – greg Jul 20 '18 at 10:33
1

On some systems, the nocompatible option is not available, or it may not fix the problem if a plugin breaks arrow key functionality. Here's a workaround...

Edit the .exrc file to include the following lines:

map! ^[OA ^[ka
map! ^[OB ^[ja
map! ^[OC ^[la
map! ^[OD ^[ha

Or, if the problem only exists in normal mode, you can change to nmap and skip the following a, as follows:

nmap! ^[OA ^[k

and so on.

Here's the key combinations needed to produce them (showing first one only):

map! <CTRL-V><Up-Arrow> <CTRL-V><ESC>ka

This escapes edit mode, moves in the wanted direction, and reenters edit mode. This is needed to overcome Vi reading the escape sequence as a sequence of literal <ESC><O><A>, etc.

Source: https://hea-www.harvard.edu/~fine/Tech/vi.html

0

For VI create or edit the file "~/.exrc" or VIM create or edit the file "~/.vimrc" set or add in the line.

set nocompatible

At the time of this writing there are commends on the second most voted item that are wondering why their entry was not accepted. The reason is there are hosts that do not allow installing other editors. Even then vim sometimes has the same effects, so there is a bunch of usable info from the top two entries. I cannot comment however hopefully this clears up reasons why neither one is 100% correct 100% of the time.

0

On this machine I had to make sure that

set nocompatible

is the last entry in ~/.vimrc. Or at least one of the last entries, in particular no more plugin is loaded afterwards.

HTH

0

For some reason, Ubuntu has omitted initialising envvar HOME for user root on my new 18.04 VPS. If that is the case, vi cannnot find the .vimrc file. The problem does not occur for normal users (in /home/).

To check the variable:

echo $HOME

If this results in a blank line, the variable is not set. The problem went away after

export HOME=/root

I moved the command into the /root/.bashrc file (I don't know where this is usually set).

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