这已经是我能接受的最简单配置了

(global-linum-mode t) 
(set-background-color "gray15")
(set-foreground-color "gray")
(global-set-key (kbd "C-a") 'mark-whole-buffer)
(global-set-key (kbd "RET") 'newline-and-indent)
(setq default-cursor-type 'bar)
(setq default-tab-width 4)
(setq c-default-style "awk")
(electric-pair-mode 1)
(setq electric-pair-pairs
      '(
        (?\" . ?\")  
        (?\{ . ?\})  
        (?\' . ?\'))) 
(show-paren-mode 1)