ls &>/dev/null

function ls {
    # 将命令的标准输出和标准错误重定向到 /dev/null 中
    "$@" &>/dev/null
}


printf "\n"
printf "   %s\n" "用户名: $(echo $USER)"
printf "   %s\n" "日期: $(date)"
printf "   %s\n" "运行时间: $(uptime -p)"
printf "   %s\n" "主机名: $(hostname -f)"
printf "   %s\n" "内核: $(uname -rms)"
printf "   %s\n" "包个数: $(rpm -qa | wc -l)"
printf "   %s\n" "分辨率: $(xrandr | awk '/\*/{printf $1" "}')"
printf "   %s\n" "内存: $(free -m -h | awk '/内存/{print $3"/"$2}')"
printf "\n"