[root@test ~]# cat show_sys_info.sh

#!/bin/bash

#

os_check() {

        if [ -e /etc/redhat-release ]; then

                REDHAT=`cat /etc/redhat-release |cut -d' '  -f1`

        else

                DEBIAN=`cat /etc/issue |cut -d' ' -f1`

        fi

        if [ "$REDHAT" == "CentOS" -o "$REDHAT" == "Red" ]; then

                P_M=yum

        elif [ "$DEBIAN" == "Ubuntu" -o "$DEBIAN" == "ubutnu" ]; then

                P_M=apt-get

        else

                Operating system does not support.

                exit 1

        fi

}

if [ $LOGNAME != root ]; then

    echo "Please use the root account operation."

    exit 1

fi

if ! which vmstat &>/dev/null; then

        echo "vmstat command not found, now the install."

        sleep 1

        os_check

        $P_M install procps -y

        echo "-----------------------------------------------------------------------"

fi

if ! which iostat &>/dev/null; then

        echo "iostat command not found, now the install."

        sleep 1

        os_check

        $P_M install sysstat -y

        echo "-----------------------------------------------------------------------"

fi

while true; do

    select input in cpu_load disk_load disk_use disk_inode mem_use tcp_status cpu_top10 mem_top10 traffic quit; do

        case $input in

            cpu_load)

                #CPU usage and load

                echo "---------------------------------------"

                i=1

                while [[ $i -le 3 ]]; do

                    echo -e "\033[32m  Reference value${i}\033[0m"

                    UTIL=`vmstat |awk '{if(NR==3)print 100-$15"%"}'`

                    USER=`vmstat |awk '{if(NR==3)print $13"%"}'`

                    SYS=`vmstat |awk '{if(NR==3)print $14"%"}'`

                    IOWAIT=`vmstat |awk '{if(NR==3)print $16"%"}'`

                    echo "Util: $UTIL"

                    echo "User use: $USER"

                    echo "System use: $SYS"

                    echo "I/O wait: $IOWAIT"

                    i=$(($i+1))

                    sleep 1

                done

                echo "---------------------------------------"

                break

                ;;

            disk_load)

                #硬盘I/O负载

                echo "---------------------------------------"

                i=1

                while [[ $i -le 3 ]]; do

                    echo -e "\033[32m  Reference value${i}\033[0m"

                    UTIL=`iostat -x -k |awk '/^[v|s]/{OFS=": ";print $1,$NF"%"}'`

                    READ=`iostat -x -k |awk '/^[v|s]/{OFS=": ";print $1,$6"KB"}'`

                    WRITE=`iostat -x -k |awk '/^[v|s]/{OFS=": ";print $1,$7"KB"}'`

                    IOWAIT=`vmstat |awk '{if(NR==3)print $16"%"}'`

                    echo -e "Util:"

                    echo -e "${UTIL}"

                    echo -e "I/O Wait: $IOWAIT"

                    echo -e "Read/s:\n$READ"

                    echo -e "Write/s:\n$WRITE"

                    i=$(($i+1))

                    sleep 1

                done

                echo "---------------------------------------"

                break

                ;;

            disk_use)

                #硬盘利用率

                DISK_LOG=/tmp/disk_use.tmp

                DISK_TOTAL=`fdisk -l |awk '/^Disk.*bytes/&&/\/dev/{printf $2" ";printf "%d",$3;print "GB"}'`

                USE_RATE=`df -h |awk '/^\/dev/{print int($5)}'`

                for i in $USE_RATE; do

                    if [ $i -gt 90 ];then

                        PART=`df -h |awk '{if(int($5)=='''$i''') print $6}'`

                        echo "$PART = ${i}%" >> $DISK_LOG

                    fi

                done

                echo "---------------------------------------"

                echo -e "Disk total:\n${DISK_TOTAL}"

                if [ -f $DISK_LOG ]; then

                    echo "---------------------------------------"

                    cat $DISK_LOG

                    echo "---------------------------------------"

                    rm -f $DISK_LOG

                else

                    echo "---------------------------------------"

                    echo "Disk use rate no than 90% of the partition."

                    echo "---------------------------------------"

                fi

                break

                ;;

            disk_inode)

                #disk inode useage

                INODE_LOG=/tmp/inode_use.tmp

                INODE_USE=`df -i |awk '/^\/dev/{print int($5)}'`

                for i in $INODE_USE; do

                    if [ $i -gt 90 ]; then

                        PART=`df -h |awk '{if(int($5)=='''$i''') print $6}'`

                        echo "$PART = ${i}%" >> $INODE_LOG

                    fi

                done

                if [ -f $INODE_LOG ]; then

                    echo "---------------------------------------"

                    rm -f $INODE_LOG

                else

                    echo "---------------------------------------"

                    echo "Inode use rate no than 90% of the partition."

                    echo "---------------------------------------"

                fi

                break

                ;;

            mem_use)

                #memory useage

                echo "---------------------------------------"

                MEM_TOTAL=`free -m |awk '{if(NR==2)printf "%.1f",$2/1024}END{print "G"}'`

                USE=`free -m |awk '{if(NR==3) printf "%.1f",$3/1024}END{print "G"}'`

                FREE=`free -m |awk '{if(NR==3) printf "%.1f",$4/1024}END{print "G"}'`

                CACHE=`free -m |awk '{if(NR==2) printf "%.1f",($6+$7)/1024}END{print "G"}'`

                echo -e "Total: $MEM_TOTAL"

                echo -e "Use: $USE"

                echo -e "Free: $FREE"

                echo -e "Cache: $CACHE"

                echo "---------------------------------------"

                break

                ;;

            tcp_status)

                #tcp connection status

                echo "---------------------------------------"

                COUNT=`netstat -antp |awk '{status[$6]++}END{for(i in status) print i,status[i]}'`

                echo -e "TCP connection status:\n$COUNT"

                echo "---------------------------------------"

                ;;

            cpu_top10)

                # top 10 of cpu processes

                echo "---------------------------------------"

                CPU_LOG=/tmp/cpu_top.tmp

                i=1

                while [[ $i -le 3 ]]; do

                    #ps aux |awk '{if($3>0.1)print "CPU: "$3"% -->",$11,$12,$13,$14,$15,$16,"(PID:"$2")" |"sort -k2 -nr |head -n 10"}' > $CPU_LOG

                    ps aux |awk '{if($3>0.1){{printf "PID: "$2" CPU: "$3"% --> "}for(i=11;i<=NF;i++)if(i==NF)printf $i"\n";else printf $i}}' |sort -k4 -nr |head -10 > $CPU_LOG

                    #循环从11列（进程名）开始打印，如果i等于最后一行，就打印i的列并换行，否则就打印i的列

                    if [[ -n `cat $CPU_LOG` ]]; then

                       echo -e "\033[32m  Reference value${i}\033[0m"

                       cat $CPU_LOG

                       > $CPU_LOG

                    else

                        echo "No process using the CPU."

                        break

                    fi

                    i=$(($i+1))

                    sleep 1

                done

                echo "---------------------------------------"

                break

                ;;

            mem_top10)

                #top of memory processes

                echo "---------------------------------------"

                MEM_LOG=/tmp/mem_top.tmp

                i=1

                while [[ $i -le 3 ]]; do

                    #ps aux |awk '{if($4>0.1)print "Memory: "$4"% -->",$11,$12,$13,$14,$15,$16,"(PID:"$2")" |"sort -k2 -nr |head -n 10"}' > $MEM_LOG

                    ps aux |awk '{if($4>0.1){{printf "PID: "$2" Memory: "$3"% --> "}for(i=11;i<=NF;i++)if(i==NF)printf $i"\n";else printf $i}}' |sort -k4 -nr |head -10 > $MEM_LOG

                    if [[ -n `cat $MEM_LOG` ]]; then

                        echo -e "\033[32m  Reference value${i}\033[0m"

                        cat $MEM_LOG

                        > $MEM_LOG

                    else

                        echo "No process using the Memory."

                        break

                    fi

                    i=$(($i+1))

                    sleep 1

                done

                echo "---------------------------------------"

                break

                ;;

            traffic)

                # check network

                while true; do

                    read -p "Please enter the network card name(eth[0-9] or em[0-9]): " eth

                    #if [[ $eth =~ ^eth[0-9]$ ]] || [[ $eth =~ ^em[0-9]$ ]] && [[ `ifconfig |grep -c "\<$eth\>"` -eq 1 ]]; then

                    if [ `ifconfig |grep -c "\<$eth\>"` -eq 1 ]; then

                            break

                    else

                        echo "Input format error or Don't have the card name, please input again."

                    fi

                done

                echo "---------------------------------------"

                echo -e " In ------ Out"

                i=1

                while [[ $i -le 3 ]]; do

                    #OLD_IN=`ifconfig $eth |awk '/RX bytes/{print $2}' |cut -d: -f2`

                    #OLD_OUT=`ifconfig $eth |awk '/RX bytes/{print $6}' |cut -d: -f2`

                    OLD_IN=`ifconfig $eth |awk -F'[: ]+' '/bytes/{if(NR==8)print $4;else if(NR==5)print $6}'`

                    #CentOS6和CentOS7 ifconfig输出进出流量信息位置不同，CentOS6中RX与TX行号等于8，CentOS7中RX行号是5，TX行号是5，所以就做了个判断.

                    OLD_OUT=`ifconfig $eth |awk -F'[: ]+' '/bytes/{if(NR==8)print $9;else if(NR==7)print $6}'`

                    sleep 1

                    NEW_IN=`ifconfig $eth |awk -F'[: ]+' '/bytes/{if(NR==8)print $4;else if(NR==5)print $6}'`

                    NEW_OUT=`ifconfig $eth |awk -F'[: ]+' '/bytes/{if(NR==8)print $9;else if(NR==7)print $6}'`

                    IN=`awk 'BEGIN{printf "%.1f\n",'$((${NEW_IN}-${OLD_IN}))'/1024/128}'`

                    OUT=`awk 'BEGIN{printf "%.1f\n",'$((${NEW_OUT}-${OLD_OUT}))'/1024/128}'`

                    echo "${IN}MB/s ${OUT}MB/s"

                    i=$(($i+1))

                    sleep 1

                done

                echo "---------------------------------------"

                break

                ;;

                        quit)

                                exit 0

                                ;;

               *)

                    echo "---------------------------------------"

                    echo "Please enter the number."

                    echo "---------------------------------------"

                    break

                    ;;

        esac

    done

done