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Postfix发信的频率控制几个参数 - 更多技术 - 清泛网 - 专注C/C++及内核技术

...成后,若向外网发送一封地址错误或不可到达的邮件,则默认情况下它会无限次数的重试,结果就导致磁盘被重试邮件日志占满,网络流量也会被浪费,更严重这会被认为是网络攻击而导致服务器或IP被封。因此需要通过一些参...
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linux 下巧妙使用squid代理服务器 - 更多技术 - 清泛网 - 专注C/C++及内核技术

...介 1.查看是否已安装squid Red Hat Enterprise Linux 5安装程序默认没有安装Squid 服务,读者可以使用下面的命令检查系统是否已经安装了 Squid服务或查看已经安装了何种版本。 rpm -q squid 2.Squid代理服务的基本配置 2.1 Squid主配置...
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Android ImageView Zoom-in and Zoom-Out

... how can i zoom outside of viewpager means a whole screen? – MD Khali Aug 27 '18 at 13:42 add a comment  |  ...
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Android - Camera preview is sideways

I am using a Preview to display what the camera see's on the screen. 8 Answers 8 ...
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Function return value in PowerShell

... If you want to output stuff to the screen from within a function without returning that text as part of the function result, use the command write-debug after setting the variable $DebugPreference = "Continue" instead of "SilentlyContinue" ...
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android splash screen sizes for ldpi,mdpi, hdpi, xhdpi displays ? - eg : 1024X768 pixels for ldpi

I have to design splash screens(images that fit screen while loading) for android application using phonegap. I have to design 4 size images that fit for 4types of screens like ldpi, mdpi , hdpi, xhdpi . Can anyone tell me exact sizes in pixels for these screens so I can design in that size ? ...
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OS X Bash, 'watch' command

... do clear; your_command; sleep 2; done That will loop forever, clear the screen, run your command, and wait two seconds - the basic watch your_command implementation. You can take this a step further and create a watch.sh script that can accept your_command and sleep_duration as parameters: #!/b...
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What are the most-used vim commands/keypresses?

...mmands preceded by : are executed on the command line at the bottom of the screen :help help with any command Navigation Cursor movement: ←h ↓j ↑k l→ By words: w next word (by punctuation); W next word (by spaces) b back word (by punctuation); B back word (by spaces) e end word (by pun...
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Where is SQL Server Management Studio 2012?

...es the Express edition includes the full suite of client tools... here's a screenshot of the setup screen. – Tim Lewis Apr 22 '13 at 14:45 55 ...
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Common CSS Media Queries Break Points [duplicate]

...gn flows well at each browser width, it should work pretty reliably on any screen size (and there are lots and lots of them out there.) share | improve this answer | follow ...