#!/bin/bash

#coding:utf-8

#author:fjj

#date:2018.1.28

echo "取出UID大於200或root的用戶信息:"

awk -F: '{if ($3 >= 200 || $1 == "root") print "info:" $0}' /etc/passwd

echo

echo "取出前3列之外的所有列:"

awk -F: '{for (i=3;i<NF;i++) print $i}' /etc/passwd | head -n 5

echo

echo "取出磁盤使用百分比:"

df -h | sed -n '2p' | awk '{print $5}' | awk -F% '{print $1}'

echo

echo "取出eth0的ip:"

echo $(ifconfig | grep eth0 -A 1 | sed -n '2p' | awk '{print $2}' | awk -F: '{print $2}')

echo $(ifconfig | grep eth0 -A 1 | sed -n '$p' | awk -F: '{print $2,$3}' | awk '{print "IP:"$1,"子網掩碼:"$3}')

echo $(/sbin/ip a | grep "eth0:" -A 2 | sed -n '$p' | awk '{print $2}' | awk -F'/' '{print "IP:"$1,"子網掩碼:"$2}')

echo

echo "顯示當前開放的端口號:"

netstat -anltp | awk -F: '{ print $2}' | awk '{print $1}' | grep -v "^$" | sort -n | uniq

#netstat -antulp | awk -F: '{print $2}' | awk '{print $1}' | sed '/^$/d' | sort -n | uniq

echo

echo "CPU負載:"

#uptime | awk -F'average:' '{print $2}'

uptime | awk -F': ' '{print $2}'

uptime | awk -F'average: ' '{print $2}'

echo

echo "CPU的個數:"

lscpu | grep "^CPU(s)" -w | awk '{print $2}'

echo

[root@centos-6_5 awk]# sh system.sh

取出UID大於200或root的用戶信息:

info:root:x:0:0:root:/root:/bin/bash

info:saslauth:x:499:76:"Saslauthd user":/var/empty/saslauth:/sbin/nologin

info:dockerroot:x:498:498:Docker User:/var/lib/docker:/sbin/nologin

取出前3列之外的所有列:

0

0

root

/root

1

取出磁盤使用百分比:

8

取出eth0的ip:

10.135.113.229

IP:10.135.113.229 子網掩碼:10.135.127.255

IP:10.135.113.229 子網掩碼:18

顯示當前開放的端口號:

22

25

42654

47772

CPU負載:

0.00, 0.00, 0.00

0.00, 0.00, 0.00

CPU的個數:

1

awk 獲取系統狀態 cpu 內存