Linux 系統資源監控腳本 cme.sh：CPU、記憶體、磁碟、網卡流量一鍵掌握

使用範例

[root@china213 ~]# cd /bin
[root@china213 bin]# ./cme.sh
cpu 99
disk 39
mem 38
nic 19855 33 0
[root@china213 bin]#

輸出：CPU 剩餘率、磁碟剩餘率、記憶體剩餘率、網卡接收 bps/pps/dps（丟包）。

建立腳本

用 vi 將下列內容寫入 cme.sh，並 chmod +x cme.sh 加執行權限。注意：Shell 檔頭必須以 #!/bin/sh 開始，Windows 儲存上傳可能因檔頭問題無法執行。

#!/bin/sh
eth="eth0 eth1 "
function get_eth_info() {
  name=$1
  cat /proc/net/dev | awk -F ':' '{if(NR>2)print $1" "$2" "$9" "$10}' | awk '{print$1" "$2" "$3" "$5}' | while \
  read line
  do
    data=`echo $name" "$line | awk '{if($1==$2)print $3" "$4" "$5}'`
    if ! [ -z "$data" ]
    then
      echo $data
    fi
  done
}
function sum_eth() {
  rm -fr 12321.txt
  for name in $eth
  do
    ret=`get_eth_info $name`
    echo $ret >> 12321.txt
  done
  cat 12321.txt | awk 'BEGIN{bps=0;pps=0;dps=0}{bps+=$1;pps+=$2;dps+=$3}END{print bps" "pps" "dps}'
}
flow=`sum_eth`
disk=`df | awk 'BEGIN{total=0;avl=0;used=0;}NR>1{total+=$2;used+=$3;avl+=$4;}END{printf"%d", avl/total*100}'`
mem=`top -b -n 1 | grep -w Mem | awk '{printf"%d",$6/$2*100}'`
cpu=`top -b -n 1 | grep -w Cpu | awk '{print$5}' | awk -F '%' '{printf"%d",$1}'`
tm=`date +%s`
if ! [ -f "flow.txt" ]
then
  echo $tm" "$flow >flow.txt
  sleep 1
  tm=`date +%s`
  flow=`sum_eth`
fi
old_flow=`cat flow.txt`
new_flow=`echo $tm $flow`
echo $new_flow >flow.txt
final_flow=`echo $old_flow $new_flow | awk '{dif_tm=$5-$1;dif_byte=$6-$2;dif_pkt=$7-$3;dif_dpkt=$8-$4;printf"%d %d %d",dif_byte*8/dif_tm, dif_pkt/dif_tm, dif_dpkt/dif_tm}'`
echo "cpu "$cpu
echo "disk "$disk
echo "mem "$mem
echo "nic "$final_flow