We have both Solaris and Linux environments at work. We use tcsh as the standard shell for hundreds of users. My question is about vi-mode in tcsh:
In Solaris, while I'm typing, I can backspace over previous chars, and then just start typing again. Insert mode is intuitive, and the commandline seems to be in insert mode automatically -- I can backspace, and type, backspace and type, all as if I pressed ESC-i to enter insert mode explicitly (doing that BTW presents the same behavior as not doing it...)
In Linux however, using a slightly newer version of tcsh (6.17), as soon as I press backspace to backup over incorrect text, the editor exits insert mode, and thereafter, I have to press "i" to get back to inserting text. Further, before backspace will erase the char to the left of the cursor, you have to press it twice -- it's switching mode apparently. Then you have to press "i" to enter back to insert mode before you can start typing again, and so on and so on. I find this Linux behavior really annoying and tedious. What is possibly the reason for this difference in behavior?
BTW, my terminal in both cases is xterm.