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不同品牌的防火墙组成高可靠性集群 - 更多技术 - 清泛网 - 专注C/C++及内核技术
...可以对应一个别名，编号和别名的对应关系在linux下放在/etc/iproute2/rt_tables这个文件里，一般0编号
的table对应的别名为upspec，255编号对应的别名为local，254和253对应的别名分别为main和default，我们通常用route命令配置和查看的路由...
What are the differences between B trees and B+ trees?
... fit on a page of memory. Therefore, it will require fewer cache misses in order to access data that is on a leaf node.
The leaf nodes of B+ trees are linked, so doing a full scan of all objects in a tree requires just one linear pass through all the leaf nodes. A B tree, on the other hand, would re...
Linux error while loading shared libraries: cannot open shared object file: No such file or director
...ies found in the directories specified on the command
line, in the file /etc/ld.so.conf, and in the trusted directories
(/lib and /usr/lib).
Usually your package manager will take care of this when you install a new library, but not always, and it won't hurt to run ldconfig even if that is not...
What's the difference between deadlock and livelock?
...k 1
...
Both examples force the threads to aquire the locks in different orders.
While the deadlock waits for the other lock,
the livelock does not really wait - it desperately tries to acquire the lock without the chance of gettin
Laravel - Eloquent or Fluent random row
...
Laravel >= 5.2:
User::inRandomOrder()->get();
or to get the specific number of records
// 5 indicates the number of records
User::inRandomOrder()->limit(5)->get();
// get one random record
User::inRandomOrder()->first();
or using the random ...
git-upload-pack: command not found, when cloning remote Git repo
...r cloning, which eliminates the need for --upload-pack on subsequent pull/fetch requests. Similarly, setting receive-pack eliminates the need for --receive-pack on push requests.
git config remote.origin.uploadpack /path/to/git-upload-pack
git config remote.origin.receivepack /path/to/git-receive-...
Comparison of CI Servers? [closed]
...tatic analysis, cross-project dependencies, deployments, functional tests, etc. To help with that planning I created this wallchart on the Elements of Enterprise CI (PDF; no registration required). Please don't let the "E-word" put you off; I just mean stuff beyond the basic fast feedback CI build. ...
Has Facebook sharer.php changed to no longer accept detailed parameters?
...is differences:
The sharer URL not is same.
The strings are in different order. ( Do not know if this affects ).
I use this URL string:
http://www.facebook.com/sharer.php?s=100&p[url]=http://www.example.com/&p[images][0]=/images/image.jpg&p[title]=Title&p[summary]=Summary
In t...
Static Block in Java [duplicate]
...
the order of execution is: static initializer, instance initializer, constructor
– Someone Somewhere
Feb 19 '14 at 0:46
...
Vertically align an image inside a div with responsive height
...ation to the first-child and our element (the image) both.
3) Finally, in order to remove the white space character between inline(-block) elements, we could set the font size of the parent to zero by font-size: 0;.
Note: I used Nicolas Gallagher's image replacement technique in the following.
Wh...