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grep a file, but show several surrounding lines?
I would like to grep for a string, but also show the preceding five lines and the following five lines as well as the matched line. How would I be able to do this?
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What is the difference between CMD and ENTRYPOINT in a Dockerfile?
In Dockerfiles there are two commands that look similar to me: CMD and ENTRYPOINT . But I guess that there is a (subtle?) difference between them - otherwise it would not make any sense to have two commands for the very same thing.
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2015互联网结束补贴战 从相杀到相爱只需一个长假 - 资讯 - 清泛网 - 专注C/...
...统计改叫大数据分析了，做耳机的改为可穿戴设备了，IDC的都自称云计算了，办公室出租改叫孵化器了，借钱给朋友改叫天使投资了，放高利贷都改叫资本运作了。”虽然段子有些调侃的意味，但也从另一个侧面说明2015年互联...
How do you declare an interface in C++?
How do I setup a class that represents an interface? Is this just an abstract base class?
15 Answers
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RE error: illegal byte sequence on Mac OS X
I'm trying to replace a string in a Makefile on Mac OS X for cross-compiling to iOS. The string has embedded double quotes. The command is:
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MySQL INNER JOIN select only one row from second table
I have a users table and a payments table, for each user, those of which have payments, may have multiple associated payments in the payments table. I would like to select all users who have payments, but only select their latest payment. I'm trying this SQL but i've never tried nested SQL sta...
Why do you have to link the math library in C?
If I include <stdlib.h> or <stdio.h> in a C program I don't have to link these when compiling but I do have to link to <math.h> , using -lm with gcc, for example:
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BIO与NIO、AIO的区别(这个容易理解) - 操作系统(内核) - 清泛网 - 专注C/C++及内核技术
...连接的时候采用BIO模式，需要先在服务端启动一个ServerSocket，然后在客户端启动Socket来对服务端进行通信，默认情况下服务端需要对每个请求建立一堆线程等待请求，而客户端发送请求后，先咨询服务端是否有线程相应，如果没...
马化腾给创业者的3点建议：行业跨界领域最有机会诞生创新 - 资讯 - 清泛网 ...
...建议：行业跨界领域最有机会诞生创新腾讯董事会主席兼CEO马化腾7月19日在香港向青年创业者建议，要关注两个产业跨界的部分，因为一个产业已经做得很久，已经是一片红海，我们现...腾讯董事会主席兼CEO马化腾7月19日在香港...
How to activate an Anaconda environment
I'm on Windows 8, using Anaconda 1.7.5 64bit.
12 Answers
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