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How to hide command output in Bash
...hat looks like this:
your_command "Is anybody listening?" >&-
Usually, output goes either to file descriptor 1 (stdout) or 2 (stderr). If you close a file descriptor, you'll have to do so for every numbered descriptor, as &> (below) is a special BASH syntax incompatible with >&am...
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
...tp
该语句表示postfix推迟投递所有的邮件直到执行sendmail -q命令，这样
我们就可以在ppp的脚本中加上sendmail -q，以便在拨号成功后让postfix开始投递邮件。
5． 关于延迟邮件的再投递控制
可以通过以下的几个参数实现对延迟邮件...
windbg 备忘 - 更多技术 - 清泛网 - 专注C/C++及内核技术
...令
5. .cls 清除命令行的显示结果。
6. WinDbg启动时增加-Q参数，在WinDbg退出后将不提示保存当前的工作环境的对话框。如果使用-QY将在退出WinDbg后，自动保存当前的配置环境。
7. 调试命令之执行命令
Ctrl+C 停止
.restart 重新启动...
node and Error: EMFILE, too many open files
...t indicates which resource is open. You'll probably see a number of lines all with the same resource name. Hopefully, that now tells you where to look in your code for the leak.
If you don't know multiple node processes, first lookup which process has pid 12211. That'll tell you the process.
In ...
clang: how to list supported target architectures?
Currently I am interested in ARM in general and specifically iphone/android targets. But I just want to know more about clang, since it feels to play important role in the years to come.
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Format a date using the new date time API
...in JavaScript or DateTime in Perl) are based on the concept of a universal all-purpose unique temporal type (in German there is the poetic expression "eierlegende Wollmilchsau"). In this design there cannot be an unsupported field. But the price is high: Many time problems cannot be adequately handl...
What is the difference between #include and #include “filename”?
...e> the preprocessor searches in an implementation dependent manner, normally in search directories pre-designated by the compiler/IDE. This method is normally used to include standard library header files.
For #include "filename" the preprocessor searches first in the same directory as the file ...
Zip lists in Python
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The question tag states Python 2.7; this is for Python 3. Besides, this answer already mentions this.
– 0 0
May 27 '18 at 14:22
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What are the use(s) for tags in Go?
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A tag for a field allows you to attach meta-information to the field which can be acquired using reflection. Usually it is used to provide transformation info on how a struct field is encoded to or decoded from another format (or stored/retrie...
How to check if smtp is working from commandline (Linux) [closed]
I have a SMTP-server, for the purpose of this question lets call it: smtp.mydomain.com.
4 Answers
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