读取系统执行状态的shell脚本

近期在学习shell。老大让写一个读取系统配置信息的脚本当作练习和工作验收，我就写了这么一个脚本，读取操作系统，内核，网卡，cpu，内存，磁盘等信息，目的是让看的人一眼就能看出这台机子的配置以及眼下的执行状况：

#!/bin/bash
#Get system infomation
(
sys_time=$(date +"%Y-%m-%d %k:%M:%S")
#os_version=$(lsb_release -a | sed -n '/Description/p' | awk -F '[:]' '{print $2}' | sed 's/^[[:space:]]*//')
os_version=$(cat /etc/issue | grep Linux)
kernel_release=$(uname -r)
netcard_num=$(ifconfig -a | grep eth | wc -l)
echo "[public_info]"
echo -e "sys_time=$sys_time	#系统时间"
echo -e "os_version=$os_version	#操作系统版本号"
echo -e "kernel-release=$kernel_release	#内核版本号"

#########NETCADE INFOMATION##########
echo 
echo "[netcard_info]"
echo "netcard_num=$netcard_num"
echo "#网卡名字|IP|MAC|网卡驱动|网卡速率|网卡发送流量(bytes)|网卡接收流量(bytes)|网卡总流量(bytes)"
for((n=0;n<$netcard_num;n++))
do
Receive_byte=$(cat /proc/net/dev | grep eth$n | awk '{print$2}')
Send_byte=$(cat /proc/net/dev | grep eth$n | awk '{print$10}')
echo "netcard_$((n+1))=eth$n|
$(ifconfig eth$n | grep "inet addr" | awk '{print$2}' | awk -F'[:]' '{print$2}')|
$(ifconfig -a | grep eth$n | awk '{print$5}')|
$(ethtool eth$n | grep Speed | awk '{print$2}' | sed 's/^[[:space:]]*//')|
${Receive_byte}|
${Send_bytei}|
$(($Receive_byte + $Send_byte))"
done

##########CPU INFOMATION##############
cpu_phical_count=$(cat /proc/cpuinfo | grep "physical id" | sort | uniq | wc -l)
cpu_model=$(cat /proc/cpuinfo | grep "model name" | uniq | awk -F'[:]' '{print$2}')
cpu_core_num=$(cat /proc/cpuinfo | grep cores | uniq | awk -F'[:]' '{print $2}' | sed 's/^[[:space:]]*//')
cpu_process_num=$(cat /proc/cpuinfo | grep process | wc -l)
cpu_frequency=$(cat /proc/cpuinfo |grep MHz|uniq | awk -F'[:]' '{print $2}' | sed 's/^[[:space:]]*//')
cache_size=$(cat /proc/cpuinfo | grep "cache size" | uniq | awk -F'[:]' '{print$2}')
cpu_idle=$(mpstat | grep all | awk '{print$11}')
cpu_used=$(mpstat | grep all | awk '{print$3}')
echo
echo "[cpu_info]"
echo -e "cpu_model=$cpu_model	#cpu型号"
echo -e "cpu_core_num=$cpu_core_num	#cpu核数"
echo -e "cpu_phical_count=$cpu_phical_count	#cpu个数"
echo -e "cpu_frequendy=$cpu_frequency	#主频/单个"
echo -e "cache_size=${cache_size}*$cpu_process_num	#缓存"
echo -e "cpu_idle=${cpu_idle}%	#空暇率"
echo -e "cpu_used=${cpu_used}%	#使用率"

###########memeber info###############
echo
echo "[mem_info]"
echo -e "mem_total=$(free -m | grep Mem | awk '{print$2}')	#总内存"
echo -e "mem_used=$(free -m | grep buffers/cache | awk '{print$3}')	#已使用"
echo -e "mem_free=$(free -m | grep buffers/cache | awk '{print$4}')	#可使用"

###########hard info ##################
file_system_num=$(df -Ph | grep / | wc -l)
echo
echo "[hard_info]"
echo "file_system_num=$file_system_num"
echo "#磁盘总容量(单位M)|已用容量(单位M)|可用流量(单位M)|已用百分比（%）|挂载文件夹"
df -Pm | grep / | awk '{print$2"|"$3"|"$4"|"$5"|"$6}'
exit 0
) >system_infomation.txt

执行的结果是这个样子的：

[public_info]
sys_time=2014-12-18 11:42:43 #系统时间
os_version=Red Hat Enterprise Linux Server release 6.4 (Santiago) #操作系统版本号
kernel-release=2.6.32-358.el6.i686 #内核版本号


[netcard_info]
netcard_num=4
#网卡名字|IP|MAC|网卡驱动|网卡速率|网卡发送流量(bytes)|网卡接收流量(bytes)|网卡总流量(bytes)
netcard_1=eth0||28:51:32:04:68:31|1000Mb/s|6863054||13709858
netcard_2=eth1||28:51:32:04:68:32|Unknown!|0||0
netcard_3=eth2||28:51:32:04:68:33|1000Mb/s|6846296||13709858
netcard_4=eth3|192.168.6.193|28:51:32:04:68:34|1000Mb/s|209054928||209117419


[cpu_info]
cpu_model= Intel(R) Atom(TM) CPU D525   @ 1.80GHz #cpu型号
cpu_core_num=2 #cpu核数
cpu_phical_count=1 #cpu个数
cpu_frequendy=1800.000 #主频/单个
cache_size= 512 KB*4 #缓存
cpu_idle=99.60% #空暇率
cpu_used=0.06% #使用率


[mem_info]
mem_total=993 #总内存
mem_used=566 #已使用
mem_free=427 #可使用


[hard_info]
file_system_num=4
#磁盘总容量(单位M)|已用容量(单位M)|可用流量(单位M)|已用百分比（%）|挂载文件夹
162650|17438|136950|12%|/
497|0|497|0%|/dev/shm
291|31|245|12%|/boot
78745|815|73931|2%|/home