The -f operator returns true only if the file exists.
只有在文件存在时，-f操作符才返回true。
If the file exists, the entire text goes into the $filetext array.
如果文件存在，整个正文将存入 $filetext数组中。
If the file exists, the installer creates a backup before making the changes.
如果该文件存在，安装程序在更改前会创建一个备份。
How to change parameter in a file, only if the file exists and the parameter is not already set?
如何改变参数文件，如果文件存在，参数不是已经准备好了吗？
The constant ZIPARCHIVE: : create indicates that a new file should be created if no file already exists by that name.
常量ziparchive：CREATE表示如果具有该名称的文件尚不存在，则应当创建一个新文件。
If nothing else, running CHKDSK allows you to test the integrity of the file system, which allows you to determine whether the problem exists at the file system level or within the document itself.
退一步说，运行CHKDSK可让你测试一下文件系统的完整性，这样就能知道这是是文件系统级的问题，还是文档本身的问题。
The deployment scripts need to be written in such a way that metadata is only written to the database if the corresponding file exists on the file system.
部署脚本需要以这种方式进行编写：如果在文件系统中存在相应的文件的话，就只将元数据写入数据库中。
Another important point here is the Overwrite property which is set to true: As a consequence, if the EAR file to be generated already exists, it will be overwritten.
另外一点比较重要需要指出的是Overwrite属性被设置为真：结果，如果一个生成的EAR文件已经存在的话，那么它将会被覆盖掉。
The processing logic is that if a file listing the relevant AMIs exists, you simply read that file and call describe (' ami-id ') for each id.
处理逻辑是这样的：如果存在一个列示相关ami的文件，您只需读取该文件并对每个id调用describe ('ami - id ')。
If the specified file exists, only the root user may authenticate.
如果指定的文件存在，那么只有root用户可以进行验证。
When a process opens a file, it exists on disk even if deleted, as long as the process holds the file open.
当进程打开了某个文件时，只要该进程保持打开该文件，即使将其删除，它依然存在于磁盘中。
Similarly, if a file in the partial application exists in the deployed application EAR, then it is updated in the deployed EAR as a result of update operation.
类似地，如果部分应用程序中的某个文件存在于已部署的应用程序EAR 中，则更新操作会在已部署的 EAR 中更新此文件。
If this option is enabled, when a skeleton file of the same name already exists in the workspace, the newly generated skeleton file will merge with the existing skeleton file.
如果这个选项已被激活，当有相同名称的一个框架文件已经存在于这个工作空间时，这个最新产生的文件将与现存的框架文件进行合并。
Next, the client issues a LOOKUP RPC request to see if the requested file exists.
接下来，客户端发出LOOKUPRPC请求来查看所请求的文件是否存在。
Note: If the destination file already exists, it will be overwritten.
注意：如果目标文件已经存在，它将被自动覆盖。
The result is True if the file tested is a file that exists and that has the specified characteristic.
如果被测试的文件存在，而且有指定的特征，则结果为True。
The problem is that root can always create files this way, even if the lock file already exists — which means that the lock won't work correctly for root.
问题是，root总是可以这样创建文件，即便锁文件已经存在，这意味着该锁不能为root正常工作。
If the datasources.xml file exists, WASPostUpgrade migrates the properties in the file into the V4 datasource and JDBC driver configuration.
如果datasources . xml文件存在，WASpostUpgrade把文件中的属性迁移到V4数据源和JDBC驱动程序配置中。
Merge replace - If security metadata exists in the repository for a resource, the security metadata in the file will replace the security metadata in the repository for the resource.
MergeReplace——如果某个资源的库中有安全元数据，文件中的安全元数据将替换资源库中的安全元数据。
There is a special file you can use within an individual theme's directory called template.php. If this file exists, Drupal will use it to allow you to override default actions of the theme system.
在单独主题的目录中可以使用一个特殊文件，它称为template.php。
In the backup router configuration file and password even if stored in encrypted form, password clear still exists the possibility of cracking.
在备份的路由器配置文件中，密码即使是用加密的形式存放，密码明文仍存在被破解的可能。
If you are working with a texture or a sound file, you will have to add it to a GameObject that already exists in the Scene or Project.
如果你要使用一个纹理或声音文件，你必须将它添加到一个已存在于场景或项目中的游戏对象上。
Delete the MANIFEST file in your new theme if it exists. It contains data from the theme you copied and can cause confusion when you upgrade.
如果新外观主题中存在MANIFEST文件，删了它。它包含你复制而来的外观主题数据，在升级时会造成混乱。
Copy files from one network location to another. If a file exists within the destination folder, the new file which received from the location folder can overwrite.
将文件或文件夹从一个网络地址复制到另一个地址，复制的时候如果该文件比目标文件新，可以采用覆盖文件法。
Note: if the XML file name specified already exists, it will be overwritten!
注意：如果指定的XML文件名已经存在，它将会被覆盖。
If the file name already exists, the log is appended to the end of the existing file.
如果该文件名已经存在，日志将追加到该现有文件的结尾处。
The server will work from left to right, checking to see if each file exists, if none of them exisit it will display a directory listing (unless, of course, you have turned this off).
如果一个也找不到，它将会把目录列表显示出来（除非你已经关闭了显示目录文件列表）。
The server will workfrom left to right, checking to see if each file exists, if none ofthem exisit it will display a directory listing (unless, of course, youhave turned this off).
如果一个也找不到，它将会把目录列表显示出来（除非你已经关闭了显示目录文件列表）。
If it exists, then it loads all the configuration from that file and if not, the app will show the config page, then the user can enter all the config details and proceed further.
如果它存在，那么它加载从该文件的所有配置，如果没有，应用程序会显示配置页面，然后用户可以进入所有的配置细节，并进一步进行。
If it exists, then it loads all the configuration from that file and if not, the app will show the config page, then the user can enter all the config details and proceed further.
如果它存在，那么它加载从该文件的所有配置，如果没有，应用程序会显示配置页面，然后用户可以进入所有的配置细节，并进一步进行。
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