5. 讓ll可以使用

1. 編輯設定檔：

   vi ~/.bashrc 

    

2. 把註解取消

   # ~/.bashrc: executed by bash(1) for non-login shells.
   
   # Note: PS1 and umask are already set in /etc/profile. You should not
   # need this unless you want different defaults for root.
   # PS1='${debian_chroot:+($debian_chroot)}\h:\w\$ '
   # umask 022
   
   # You may uncomment the following lines if you want `ls' to be colorized:
    export LS_OPTIONS='--color=auto'
    eval "`dircolors`"
    alias ls='ls $LS_OPTIONS'
    alias ll='ls $LS_OPTIONS -l'
    alias l='ls $LS_OPTIONS -lA'
   #
   # Some more alias to avoid making mistakes:
   # alias rm='rm -i'
   # alias cp='cp -i'
   # alias mv='mv -i'
   

    

3. 重新登出登入後就會生效。