install tmux on centos by temporarly enable EPEL

install-tmux-centos

rpm -Uvh http://epel.mirror.net.in/epel/6/i386/epel-release-6-8.noarch.rpm
yum install -y tmux

# changes ctr-b to ctr-a
cat > /etc/tmux.conf <<EOF
unbind C-b
set -g prefix C-a
bind C-a send-prefix
EOF

rpm -e epel-release-6-8.noarch

#########################################################################
# protip: you can start a single tmux with a different keybining
# without touvhing /rtc/tmux.conf:
#
# tmux new-session -n "monitor1" \; set -g prefix C-a
#
#########################################################################