[feature] skip installation if already installed

tmux/install.sh

@@ -8,6 +8,7 @@ TMUX_VER=3.1b
 # install ranger
 case "$PM" in
     apt)
+        if which tmux &>/dev/null && [ "$(tmux -V)" != "tmux $TMUX_VER" ]; then
             sudo apt install libevent-dev libncurses5-dev bison autoconf bc -y
             TMUX_SRC_URL=https://github.com/tmux/tmux/releases/download/$TMUX_VER/tmux-$TMUX_VER.tar.gz
             if in-china; then
@@ -23,6 +24,7 @@ case "$PM" in
             sudo make install
             popd
             rm -rf /tmp/tmux*
+        fi
         ;;
     pacman)
         sudo pacman -S --needed tmux bc
@@ -31,4 +33,5 @@ esac
 
 # symlink configuration
 lnsf $DIR/tmux.conf ~/.tmux.conf
-lnsf $DIR/config $XDG_CONFIG_HOME/tmux
+lnsf $DIR/config/tmux2.8.conf $XDG_CONFIG_HOME/tmux/tmux2.8.conf
+lnsf $DIR/config/tmux2.9.conf $XDG_CONFIG_HOME/tmux/tmux2.9.conf