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Linux日志切分工具：Logrotate - 更多技术 - 清泛网 - 专注C/C++及内核技术
...parts /etc/cron.weekly
42 4 1 * * root run-parts /etc/cron.monthly
如果使用的是新版CentOS，那么配置文件为：/etc/anacrontab。
问题：如何告诉应用程序重新打开日志文件？
以Nginx为例，是通过postrotate指令发送USR1信号来通知Nginx重新打开日志...
linux 通过bind下搭建DNS Server - 更多技术 - 清泛网 - 专注C/C++及内核技术
...evel 235 on
#开启dns 服务器
service named start
#如已经开启请使用下面的命令重启
service named restart
然后在终端输入
nslookup
#enter进入nslookup的会话后直接输入需要测试的域名看看返回的结果是否正确如：
vkilo.ryan.com
还有一些如d...
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MIT官方已升级至2.73版本，中文网待测试并升级相关特性 - App Inventor 2 ...
...择不同的受支持提供商和模型。
修改 ChatBot 系统属性以使用更大的文本区域。
更新加泰罗尼亚语翻译。
实现可拖动属性和组件帮助弹出窗口（键入“？”时看到的消息）。
错误修复。
翻译自官方升级日志：https://appinvento...
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How do multiple clients connect simultaneously to one port, say 80, on a server? [duplicate]
.... Nobody is ever in the "connected" state.
For a stateful protocol (like TCP), a connection is identified by a 4-tuple consisting of source and destination ports and source and destination IP addresses. So, if two different machines connect to the same port on a third machine, there are two disti...
What ports does RabbitMQ use?
....0.0.1)
Host is up (0.00041s latency).
PORT STATE SERVICE
443/tcp open https
5672/tcp open amqp
15672/tcp open unknown
35102/tcp open unknown
59440/tcp open unknown
Oh look, 5672, and 15672
Use netstat:
netstat -lntu
Active Internet connections (only servers)...
Efficiently test if a port is open on Linux?
...
A surprise I found out recently is that Bash natively supports tcp connections as file descriptors. To use:
exec 6<>/dev/tcp/ip.addr.of.server/445
echo -e "GET / HTTP/1.0\n" >&6
cat <&6
I'm using 6 as the file descriptor because 0,1,2 are stdin, stdout, and stderr....
What are named pipes?
...d default exists (much like port 80 for HTTP, SQL server uses port 1433 in TCP/IP; \\.\pipe\sql\query for a named pipe).
By setting up additional named pipes, you can have multiple DB servers running, each with its own request listeners.
The advantage of named pipes is that it is usually much fas...
How many socket connections can a web server handle?
...edicated hosting, I read somewhere a server/machine can only handle 64,000 TCP connections at one time, is this true? How many could any type of hosting handle regardless of bandwidth? I'm assuming HTTP works over TCP.
...