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What's an easy way to read random line from a file in Unix command line?
What's an easy way to read random line from a file in Unix command line?
13 Answers
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Set the value of a variable with the result of a command in a Windows batch file
..., I instead suggest using Cygwin on your Windows system if you are used to Unix-type scripting.
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Reload .profile in bash shell script (in unix)?
...verflow.com%2fquestions%2f3274397%2freload-profile-in-bash-shell-script-in-unix%23new-answer', 'question_page');
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How to get current date & time in MySQL?
...SYSDATE()
If you want the current date in epoch format, then you can use UNIX_TIMESTAMP(). For example:
select now(3), sysdate(3), unix_timestamp();
would yield
+-------------------------+-------------------------+------------------+
| now(3) | sysdate(3) | unix_time...
如何获取IE (控件)的所有链接（包括Frameset, iframe） - 其他 - 清泛IT社...
...spatch> spDispCollection;
body->get_all(&spDispCollection);复制代码所以要获取iframe/frame(frameset) 里面的节点列表的话, 则需要根据body/doc 找到frames, 然后从frames -> IHTMLWindow2 -> IHTMLDocument2 . 主要有2个方法, 下面是代码片段
方法一：...
How do I copy folder with files to another folder in Unix/Linux? [closed]
I am having some issues to copy a folder with files in that folder into another folder. Command cp -r doesn't copy files in the folder.
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Why is the apt-get function not working in the terminal on Mac OS X v10.9 (Mavericks)?
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it's worth noting that Mac OS X is a unix-based OS (Unix -> BSD -> NeXTSTEP -> Mac OS X) :)
– refaelio
Apr 28 '15 at 9:26
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理解和配置 Linux 下的 OOM Killer - 操作系统(内核) - 清泛网 - 专注C/C++及内核技术
...系统内存不足、挑选并杀掉某个进程的过程可以参考内核源代码 linux/mm/oom_kill.c，当系统内存不足的时候，out_of_memory() 被触发，然后调用 select_bad_process() 选择一个 “bad” 进程杀掉，如何判断和选择一个 “bad” 进程呢，总不能...
Are there any standard exit status codes in Linux?
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Note that in some flavors of unix, some commands use an exit status of 2 to indicate other things. For instance, many implementations of grep use an exit status of 2 to indicate an error, and use an exit status of 1 to mean that no selected lines were fo...
STL中map容器使用自定义key类型报错详解 - C/C++ - 清泛网 - 专注C/C++及内核技术
...STL的map容器中，key的类型是不是随意的呢？实践编写测试代码定义一个结构体来试试：[cpp]view plaincopystructa{char*pName;intm_a;} 引言
STL的map容器中，key的类型是不是随意的呢？
实践
编写测试代码
定义一个结构体来试试：
st...