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              【Linux面試真題】- 如何實時查看網卡流量為多少?如何查看歷史網卡流量?

              【Linux面試真題】- 如何實時查看網卡流量為多少?如何查看歷史網卡流量?

              答:
              
              安裝sysstat包,使用sar命令查看。
              
              yum install -y sysstat#安裝sysstat包,獲得sar命令
              sar -n DEV#查看網卡流量,默認10分鐘更新一次
              sar -n DEV 1 10#一秒顯示一次,一共顯示10次
              sar -n DEV -f /var/log/sa/sa22#查看指定日期的流量日志



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