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https://www.tsingfun.com/it/tech/1087.html 

Http长连接200万尝试及调优 - 更多技术 - 清泛网 - 专注C/C++及内核技术

...200万个,但我们设置最大文件描述符限制时,会遇到一些问题,我们在后面详细讲解。 2. 客户端的准备 由于我们需要构建大量的客户端,而我们知道,在一台系统上,连接到一个服务时的本地端口是有限的。由于端口是16位整...
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One SVN repository or many?

... = none # or read or write auth-access = write password-db = /var/svn/conf/passwd authz-db = /var/svn/conf/authz realm = Repos1 SVN Repository File: /var/svn/conf/authz [groups] group_repos1_read = user1, user2 group_repos1_write = user3, user4 group_repos2_read = user1, user4 ### Global Right f...
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nginx error connect to php5-fpm.sock failed (13: Permission denied)

...fixed a security bug where o had rw permission to the socket file. Open /etc/php5/fpm/pool.d/www.conf or /etc/php/7.0/fpm/pool.d/www.conf, depending on your version. Uncomment all permission lines, like: listen.owner = www-data listen.group = www-data listen.mode = 0660 Restart fpm - sudo servi...
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Can't su to user jenkins after installing Jenkins

... as root, enter su - jenkins Also, check in /etc/passwd that user jenkins is allowed to logon: there should be something like /bin/bash or /bin/sh, certainly not /bin/false at the end of the line. Hint: You don't use su and sudo at the same time. ...
https://www.tsingfun.com/it/tech/1047.html 

一次「Too many open files」故障 - 更多技术 - 清泛网 - 专注C/C++及内核技术

...务不可用故障,于是我惯性的判断应该还是 ES_HEAP_SIZE 的问题,不过登录服务器后发现日志里显示大量的「Too many open files」错误信息。 那么 ElasticSearch 设置的最大文件数到底是多少呢?可以通过 proc 确认: shell> cat /proc/<PID>/l...
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Easiest way to activate PHP and MySQL on Mac OS 10.6 (Snow Leopard), 10.7 (Lion), 10.8 (Mountain Lio

...extMate, but the free TextWrangler or vi or nano will do too), and open: /etc/apache2/httpd.conf Find the line: "#LoadModule php5_module libexec/apache2/libphp5.so" And uncomment it (remove the #). Download and install the latest MySQL version from mysql.com. Choose the x86_64 version...
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Vsphere 6 集群上 安装 oracle rac 遇到的共享磁盘故障 - 数据库(内核) - ...

...。但是 oracle 启动不了。 分析 经过3天的测试,找问题,依然没有完全解决问题, 从三天的测试结果来看 无非是 SCSI 总线, SCSI 共享总线,和 磁盘锁定,多点写入参数的组合 实验结果如下 SCSI 总线 ...
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How does password salt help against a rainbow table attack?

...ee what purpose the salt serves, A rainbow table attack always needs /etc/passwd (or whatever password database is used), or else how would you compare the hashes in the rainbow table to the hashes of the actual passwords? As for the purpose: let's say the attacker wants to build a rainbow table fo...
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PDOException “could not find driver”

... get it working, you will need to restart your web-server: Apache: sudo /etc/init.d/apache2 restart Nginx: sudo /etc/init.d/nginx restart share | improve this answer | fol...
https://www.tsingfun.com/it/cpp/2214.html 

服务器保持大量TIME_WAIT和CLOSE_WAIT的解决方法 - C/C++ - 清泛网 - 专注C/C++及内核技术

...的处理方法混为一谈,以为优化系统内核参数就可以解决问题,其实是不恰当的,优化系统内核参 数解决TIME_WAIT可能很容易,但是应对CLOSE_WAIT的情况还是需要从程序本身出发。现在来分别说说这两种情况的处理方法: 1.服务...