[[ `cat a.log |wc -l` -eq 0 ]] && echo "file is empty"
aaarticlea/png;base64,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" alt="" />

shell判断文件是否为空的更多相关文章

  1. shell判断文件类型和权限

    shell  判断文件类型. -d 文件 判断该文件是否存在,并且是否为目录(是目录为真) -e文件 判断该文件是否存在(存在为真) -f文件 判断该文件是否存在,并且是否为文件(是普通文件为真) - ...

  2. shell判断文件是否存在

    转自:http://www.cnblogs.com/sunyubo/archive/2011/10/17/2282047.html 1. shell判断文件,目录是否存在或者具有权限 2. #!/bi ...

  3. Linux shell判断文件和文件夹是否存在

    shell判断文件,目录是否存在或者具有权限 #!/bin/sh myPath="/var/log/httpd/" myFile="/var /log/httpd/acc ...

  4. shell 判断文件、目录是否存在

    shell判断文件是否存在   1. shell判断文件,目录是否存在或者具有权限 2. #!/bin/sh 3. 4. myPath="/var/log/httpd/" 5. m ...

  5. Shell 判断文件或文件夹是否存在

    #shell判断文件夹是否存在 #如果文件夹不存在,创建文件夹 if [ ! -d "/myfolder" ]; then mkdir /myfolder fi #shell判断文 ...

  6. [转] Linux shell判断文件和文件夹是否存在

    shell判断文件,目录是否存在或者具有权限 #!/bin/sh myPath="/var/log/httpd/" myFile="/var /log/httpd/acc ...

  7. Linux判断文件是否为空，不为空则打印该文件的大小

    Linux判断文件是否为空,不为空则打印该文件的大小,使用到的命令是-s + filename -s filename 如果文件大小大于0,则返回true. 例如: 查看当前目录 # ls -l to ...

  8. shell判断文件夹是否存在

    #shell判断文件夹是否存在 #如果文件夹不存在,创建文件夹 if [ ! -d "/myfolder" ]; then mkdir /myfolder fi #shell判断文 ...

  9. shell判断文件是否存在[转]

    原文出处: http://canofy.iteye.com/blog/252289 shell判断文件,目录是否存在或者具有权限 #!/bin/sh myPath="/var/log/htt ...

随机推荐

  1. springcloud-4：服务注册（hello-service）

    服务端 请见 http://www.cnblogs.com/huiy/p/8668005.html 客户端: 主启动类 import org.springframework.boot.SpringAp ...

  2. pointer & iterator

    pointer: address, use operator(*) to get/set the value 1) support operator(+,-), move to next posito ...

  3. 机器学习之高斯混合模型及EM算法

    第一部分: 这篇讨论使用期望最大化算法(Expectation-Maximization)来进行密度估计(density estimation). 与k-means一样,给定的训练样本是,我们将隐含类 ...

  4. Confluence 6 管理协同编辑 - 审计的考虑

    我们知道一些客户对审计是主要考虑的方面.我们不能保证在协同编辑的时候具有审计,审查功能.所有页面的修改当前附加到用户发布页面的属性中而不是用户的特定修改. 如果这个对你来说是一个问题的话,我们建议你在 ...

  5. 【Myeclipse】用Myeclipse10.5搭建C/C++开发环境

    一.添加CDT到Myeclipse10.5 我的Myeclipse版本是10.5,刚开始用Myeclipse configuration center添加安装,不管是用远程URL还是用本地Archiv ...

  6. 关于npm 淘宝镜像 以及package.json里包的更新

    1.淘宝镜像的设置 npm config set registry https://registry.npm.taobao.org npm config set disturl https://npm ...

  7. angularjs 监听 文档click 事件

    项目 上遇到  innHTML  放入 一大段的html 内容 中带有 click 事件 如onclick="callInMethod("http://www.crm.bmcc.c ...

  8. vue之node.js的简单介绍

    一.什么是node.js? 它是可以运行JavaScript的服务平台,可以吧它当做一门后端程序,只是它的开发语言是JavaScript 二.安装 1.node.js的特性: - 非阻塞IO模型 - ...

  9. ERROR 1044 (42000): Access denied for user 'root'@'%' to database 'mysql'

    原因:修改数据库账号时删除了默认的localhost root,  新建了% root 但没有赋予全部权限; 解决方法: 1.关闭数据库# mysqld stop 2.在my.cnf里加入skip-g ...

  10. 工业以太网EtherNet/IP协议安全分析整理

    1.     EtherNet/IP : 设备可以用户数据报协议(UDP)的隐式报文传送基于IO的资料 ,用户传输控制协议(TCP)显示报文上传和下参数,设定值,程式 ,用户主站的轮询 从站周期性的更 ...