110 lines
1.7 KiB
Markdown
110 lines
1.7 KiB
Markdown
> 本文作者：丁辉
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# Shell脚本集合记录
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## Shell里有 Read 如何默认回车?
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- 示例一
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```bash
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#!/bin/bash
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defaultValue="默认值"
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# 如果没有输入，使用默认值
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read userInput
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userInput=${userInput:-$defaultValue}
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echo "你输入的内容是：$userInput"
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```
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执行脚本
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```bash
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bash shell.sh <<< ""
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```
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- 示例二
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> 如果有很多 read 需要默认回车
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```bash
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#!/bin/bash
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defaultValue1="默认值1"
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defaultValue2="默认值2"
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echo "请输入内容1："
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read userInput1
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userInput1=${userInput1:-$defaultValue1}
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echo "请输入内容2："
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read userInput2
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userInput2=${userInput2:-$defaultValue2}
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echo "你输入的内容1是：$userInput1"
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echo "你输入的内容2是：$userInput2"
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```
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执行脚本
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```bash
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bash shell.sh <<< $'\n\n'
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```
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## 如何模拟按钮选择
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[Shell文件](https://gitee.com/offends/Linux/blob/main/File/Shell/button.sh)
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下载 Shell 示例
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```bash
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wget https://gitee.com/offends/Linux/raw/main/File/Shell/button.sh
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```
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## Nginx证书签发
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[Shell文件](https://gitee.com/offends/Linux/blob/main/File/Shell/nginx-ssl.sh)
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下载 Shell 示例
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```bash
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wget https://gitee.com/offends/Linux/raw/main/File/Shell/nginx-ssl.sh
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```
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## Mysql定时备份脚本
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1. 创建备份文件存储目录
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```bash
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mkdir -p /opt/mysql/backup && cd /opt/mysql/backup
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```
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2. 下载脚本
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```bash
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wget https://gitee.com/offends/Linux/raw/main/File/Shell/mysql-backup.sh
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```
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修改如下内容
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```bash
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MYSQL_HOST=<MYSQL_HOST>
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MYSQL_USER=root
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MYSQL_PASS=root
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```
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3. 配置计划任务
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```bash
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crontab -e
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```
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添加定时任务
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```bash
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0 2 * * * bash /opt/mysql/backup/mysql-backup.sh
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```
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