Linux Trigger：如何使用Shell脚本自动化任务

<code>#!/bin/bash</code>

<code>#!/bin/bash
<h1>指定源目录和目标目录</h1><p>SOURCE_DIR="/path/to/source"
BACKUP_DIR="/path/to/backup"</p><h1>若不存在则创建备份目录</h1><p>mkdir -p "$BACKUP_DIR"</p><h1>获取当前日期</h1><p>DATE=$(date +%Y%m%d)</p><h1>构建备份文件名</h1><p>BACKUP_FILE="$BACKUP<em>DIR/backup</em>$DATE.tar.gz"</p><h1>执行备份操作</h1><p>tar -czvf "$BACKUP_FILE" "$SOURCE_DIR"</p><h1>显示备份完成的消息</h1><p>echo "Backup completed: $BACKUP_FILE"</code>

<code>#!/bin/bash</p><h1>定义日志目录和保留时长</h1><p>LOG_DIR="/var/log/myapp"
RETENTION_DAYS=7</p><h1>清理超出保留期限的日志文件</h1><p>find "$LOG_DIR" -type f -name "*.log" -mtime +$RETENTION_DAYS -exec rm -f {} \;</p>
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                <h1>显示清理完成的信息</h1><p>echo "Logs older than $RETENTION_DAYS days have been removed."</code>

<code>#!/bin/bash</p><h1>刷新包列表</h1><p>sudo apt-get update</p><h1>升级所有已安装的包</h1><p>sudo apt-get upgrade -y</p><h1>显示更新完成的信息</h1><p>echo "System update completed."</code>

<code>chmod +x /path/to/your/script.sh</code>

<code>/path/to/your/script.sh</code>

<code>crontab -e</code>

<code>0 2 <em> </em> * /path/to/your/backup_script.sh</code>