Bash绑定命令

Question

I have a very curious situation, when logged n terminal to my Centos host the capital r does not work, it doesn't type anything.

It does work when i'm editing files for example.

After long search of possible issue I think I found the problem is that I have no bind association for the R , see and extract from the output of bind -p :

=======

"M": self-insert
"N": self-insert
"O": self-insert
"P": self-insert
"Q": self-insert
"S": self-insert
"T": self-insert
"U": self-insert
"V": self-insert

============

as you can see the "R" is missing, how do I add it? please keep in mind I cannot type "R" in my terminal :)

Answer 1

Have you tried this?

bind '"R":self-insert'

or this, if you can't type "R":

bind '"'`echo -e '\x52'`'":self-insert'

Answer 2

rcap=$(echo r | tr '[a-z]' '[A-Z]')

This command sets rcap variable to R . Now you can use $rcap instead of R anywhere, eg in a command that restores the binding of R :

bind "$rcap":"self-insert"

Of course you can also edit a script and source it from bash , and there you can use R .

Answer 3

My guess would be that the mapping is removed somewhere. Run bash -x to start a new shell and see which commands are executed while it starts.

You can also try to add bind "R":"self-insert" to your .bashrc and start a new terminal.