note that even though the ftp server had automatically closed the connection after 60 seconds on inactivity, the client will only be informed when it tries to execute a command after the timeout.
注意,即使ftp服务器已经在保持60秒不活动之后自动关闭了连接,但是客户要在超时之后尝试执行命令时才会被通知。
once the user selects a pdf document, the pdfviewer class needs to execute a command that it has exposed in the activex control.
一旦用户选择了一个pdf文档,pdfviewer类就需要执行activex控件中所公开的命令。
you may have already seen simple shell logic using the && and || operators, which allow you to execute a command based on whether the previous command exits normally or with an error.
您可能已经看到过使用&&和 ||操作符的简单shell逻辑,它允许您根据前一条命令的退出状态(正确退出或伴随错误退出)而执行后一条命令。