centos服务器常用清理脚本分享

#! \bin\bash
###用于定时清除nacos今天之前的日志文件
date=`date -d "$date -1 day" +"%Y-%m-%d"`
delFilePath="/root/nacos/bin/logs/access_log.${date}.log"
if [  -f "${delFilePath}" ];then
    rm -rf ${delFilePath}
fi
rm -rf /root/nacos/logs/*.log.*.0

#!/bin/sh
# 脚本启动信息
echo "Starting to clear large nohup.out files in /data and /root directories..."
# 检查是否具有执行权限
if [ "$(id -u)" -ne 0 ]; then
    echo "Error: Please run as root or with sudo."
    exit 1
fi
# 查找并处理大于100MB的nohup.out文件
find_result=$(find /data /root /home /mnt -name 'nohup.out' -type f -size +100M)
if [ -z "$find_result" ]; then
    echo "No nohup.out files larger than 100MB found in /data and /root."
else
    echo "Found the following large nohup.out files:"
    echo "$find_result"
    echo "Clearing their contents..."
    find /data /root /home /mnt -name 'nohup.out' -type f -size +100M -exec sh -c '
        if [ -s "$0" ]; then 
            echo "Clearing content of $0..."
            echo "" > "$0"
            echo "Content of $0 has been cleared."
        else
            echo "$0 is empty, no action needed."
        fi
    ' {} \;
fi
# 脚本结束信息
echo "Script completed. All large nohup.out files in /data and /root have been processed."
# 注意：
# 1. 确保仅在必要时以root权限运行此脚本。
# 2. 脚本现在只在/data和/root目录下搜索符合条件的文件，提高了效率和安全性。

#!/bin/bash
echo "开始清理缓存"
sync;sync;sync #写入硬盘，防止数据丢失
sleep 10 #延迟10秒
echo 1 > /proc/sys/vm/drop_caches
echo 2 > /proc/sys/vm/drop_caches
echo 3 > /proc/sys/vm/drop_caches
echo "清理结束"

crontab -l  # 查询定时任务列表
crontab -e #编辑当前用户的定时任务，wq保存退出,会自动保存到/var/spool/cron文件中
chmod 777 clear_nohup.sh # 给sh文件授权
tail -300 /var/log/cron # 查看定时任务日志
/sbin/service crond reload # 重新加载定时任务配置