When I try to open a file using vim inside tmux the whole window freezes. I have to kill the window with C-a &.Here are my ~/.vimrc settings::set autoindent:set ts=4:set number:set shiftwidth=4:set showmode:filetype on:filetype plugin on:syntax enable:set mouse=aand ~/.tmux.conf# I like Ctrl-a as the default hotkeyunbind C-bset-option -g prefix C-a# Split window using | and -unbind %bind | split-window -hbind - split-window -v# Set status barset -g status-bg blackset -g status-fg whiteset -g status-left #[fg=green]#H# Highlight active windowset-window-option -g window-status-current-bg red# Makes window numbering start from 1, instead of 0set -g base-index 1I am facing the problem in RHEL. However the same config works fine in my Mac. I guess, things were working fine till my RHEL box got restarted and I tried to recover a file in from vi swap file.Any ideas on how to fix this?[edit]: I tried ssh to other box inside tmux and running vi there. Works fine in remote box ![added later]Following the suggestion of @jasonwryan, I added the line set -g default-terminal screen-256color at the end of tmux.conf. That prevented programs like less from working.echo $TERM inside tmux is screen and outside tmux is xterm.Searching for $TERM led me to https://wiki.archlinux.org/index.php/Tmux, from where I added the line set -g default-terminal screen-256color as the first line of tmux.conf. This made the $TERM inside tmux to screen-256color. But now when I start vi inside tmux, it displays the following error:E558: Terminal entry not found in terminfo'screen-256color' not known. Available builtin terminals are:    builtin_riscos    builtin_amiga    builtin_beos-ansi    builtin_ansi    builtin_pcansi    builtin_win32    builtin_vt320    builtin_vt52    builtin_xterm    builtin_iris-ansi    builtin_debug    builtin_dumbdefaulting to 'ansi'Looks like I have solved the issue. Just added set -g default-terminal xterm as the first line of my ~/.tmux.conf and it worked !
Vim not running inside tmux
vim;tmux
I solved the issue by adding the lineset -g default-terminal xtermas the first line of my ~/.tmux.conf and it worked fine.However as @jasonwryan has pointed out, the TMUX FAQ clearly states that:Most display problems are due to incorrect TERM! Before  reporting problems make SURE that TERM settings are correct inside and  outside tmux.Inside tmux TERM must be screen or similar (such as  screen-256color). Outside, it must match your terminal ...I only post this answer as it actually solved my problem. please feel free to add your alternative solutions.