自编shell脚本合集（完善中）

1.数据库备份

#!/bin/bash
user="root"
psword="root"
bakdir="/data/mysqlbak"
Date=$(date +%F)
dbnames=$(mysql -u root -proot -e "show databases"  | sed 1d | egrep -v "(schema$|mysql)")
#删除3天之前的备份
find $bakdir -ctime +3  -name \*.sql | xargs rm  -f
#备份数据库
for dbname in $dbnames
do
        mysqldump -u$user -p$psword --databases $dbname > $bakdir/${dbname}-${Date}.sql
done

 2.自动安装apache php mysql （利用本地网络源）

#!/bin/bash
#Date     :2018-04-09 
#Author   :高鹏
#Function :本脚本用于centos6/7使用自带源安装httpd、mysql、php
#Version  :0.2
#Update   :2018-04-09
grep -i "centos" /etc/redhat-release 2> /dev/null
if [[ $? -ne 0  ]];then
    echo "NOT CentOS" && exit
fi

OS=$(awk -F . '{print $1}' /etc/redhat-release | grep -o [0-9] )
function package_version(){
yum list | egrep "(^httpd.x86_64|^php.x86_64|^mysql.x86_64|^mariadb.x86_64)" | awk -F "-" '{print $1}'| awk 'BEGIN{printf("pachage\t\tversion\n")}  {print$1"\t"$2}'
}


function package_info(){
Apache=$(httpd -v 2> /dev/null | egrep -o  '[0-9]\.[0-9]\.[0-9]') && echo "Apache Version : $Apache" || echo "Apache Version  : uninstalled"
Mysql=$(mysql -V 2> /dev/null| egrep -o  '[0-9]\.[0-9]\.[0-9]') && echo "MySQL/MariaDB  : $Mysql" || echo "MySQL/MariaDB   :uninstalled"
PHP=$(php -v 2> /dev/null | sed -n 1p | egrep -o  '[0-9]\.[0-9]\.[0-9]') && echo "PHP    Version : $PHP" || echo "PHP   Version   :uninstalled"
}


function install(){
 [[ $OS -eq 7 ]] && yum install -y httpd php mariadb-server 
 [[ $OS -eq 6 ]] && yum install  -y  httpd php mysql-server mysql mysql-devel
}

function start_server(){
    [[ $OS -eq 7 ]] && systemctl start mariadb httpd > /dev/null
    [[ $OS -eq 6 ]] && service mysqld start &&    service httpd start
}
function main(){

    echo "################################"
    echo "########## installed ###########"
    package_info
    echo "################################"
    package_version

    read -p  "If install?(Y/N) :" yn
    case $yn in
        Y|y|yes|YES )
            read -p "pelease input mysql psword(default:root) :" mysql_psword
            mysql_ps=${mysql_psword:=root}
            install;;
        N|n|no|NO )
            exit;;
        *)
            echo "invalid input" && exit;;
    esac
    start_server
    /usr/bin/mysqladmin -u root -h localhost.localdomain password "$mysql_ps"

}
main &&
echo “install complete”

 3.获取本机或远程主机信息

#!/bin/bash
#localinfo.sh
#本地信息
clear
#判断是否为root用户
if [[ $(id -u) -ne 0 ]];then
    echo "Please execute as root."
    exit 2
fi

#获取版本号
if [[ -f /etc/redhat-release ]]; then
Version=$(cat /etc/redhat-release)
elif [[ -f /etc/issue ]]; then
Version=$(awk '{print $1,$2}' /etc/issue)
fi
#获取磁盘信息
Disk_Info=$(lsblk -l | awk 'BEGIN{printf("Disk\t\tSize\n")} /disk/ {print $1"\t\t"$4}')
#获取IP信息
IP_Addr=$(
ETH=$(awk -F ":" 'NR>2{print $1}' /proc/net/dev)&&
for eth in $ETH;do
    echo -e "$eth\t\t$(ifconfig $eth | awk '/inet/ {print $2}' | egrep -o  "[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}")"
done
)
#获取端口及服务信息
Port=$( netstat  -lntup | awk -F /  '/LISTEN/ {print $1,$2}' | awk '{print $4"\t\t"$8}' | egrep -o  '[0-9]{1,5}'$'\t\t''[a-z]*' | sort | uniq)
#获取内存信息
Mem_Info=$(free -h | egrep "(Mem|Swap)" | awk '{print $1"\t\t"$2}')
#获取 CPU信息
Cpu=$(grep "physical id" /proc/cpuinfo | uniq | wc -l)
Core=$(grep "core id" /proc/cpuinfo |  wc -l) 
function main(){
echo -e  "
###########################################
DATE        : $(date "+%F %r")        
############## SYSTEM INFO ################
HOSTNAME    : $(hostname)
VERSION        : $Version
ARCH        : $(uname -m)
##############  IP   INFO  ################
$IP_Addr
############## DISK  INFO  ################
$Disk_Info
############## CPU   INFO  ################
NUM OF CPU    : $Cpu
NUM OF CORE    : $Core
############## MEM   INFO  ################
$Mem_Info
############## PORT SERVER ################
PORT\t\tSERVER
$Port
##############     END     ################"
}
main

远程信息（调用localinfo.sh）

#!/bin/bash
if [[ -z  $1 ]];then
    echo "USE: $0 IP_ADDRESS [PORT]"&&exit
else
PORT=$2
PORT=${PORT:=22}
ssh root@$1 -p $PORT  'bash -s' < LocalInfo.sh
fi

 4带颜色输出字符

#!/bin/bash
#closr
#Black red green yellow blue violet and bluish white
function Echo_Black(){
    echo -e "\033[30m${1}\033[0m"
}
function Echo_Red(){
    echo -e "\033[31m${1}\033[0m"
}
function Echo_Green(){
    echo -e "\033[32m${1}\033[0m"
}
function Echo_Yellow(){
    echo -e "\033[33m${1}\033[0m"
}
function Echo_Blue(){
    echo -e "\033[34m${1}\033[0m"
}
function Echo_Violet(){
    echo -e "\033[35m${1}\033[0m"
}
function Echo_Bluish(){
    echo -e "\033[36m${1}\033[0m"
}
function Echo_White(){
    echo -e "\033[37m${1}\033[0m"