pid | 易学教程

Creation of new process for each request of web page?

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问题 It might be a basic question but everytime a user call a php file from a server, does it create a new process from that server ? For example, I have a basic form (let's say on index.php) that submits a text to another php file. In that php file, I print the posix_getpid() . I opened in two tabs my index.php an filled in and submitted a text and I ended up with two different pid on each tab. Which lead me to the conclusion that a server probably create a new process for each script. Am I right

Docker基础-容器操作

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1、创建容器 1.新建容器　　可以使用docker create命令新建一个容器。 [root@linux-node1 ~]# docker create -it ubuntu:latest ffc9099be315f1b94876410c7d74dcd20e311e735e638080dd477534c063a6d6 [root@linux-node1 ~]# docker ps -a CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES ffc9099be315 ubuntu:latest "/bin/bash" 8 seconds ago Created optimistic_pare [root@linux-node1 ~]# 　　说明：用docker create命令创建的容器处于停止状态，可以使用docker start命令来启动它。 2.启动容器　　使用docker start命令可以启动一个停止状态的容器。 [root@linux-node1 ~]# docker start ffc9099be315 ffc9099be315 [root@linux-node1 ~]# docker ps CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES

Process name from its pid in linux

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问题 How to get a process name from his pid ? For example I execute cat file1.txt, but I want to figure out that cat command and its arguments since its pid in the system. Is there a struct to determine it or something similar? Any idea? 回答1: There is not any general way to do this unix. Each OS has different ways to handle it and some are very hard. You mention Linux though. With Linux, the info is in the /proc filesystem. To get the command line for process id 9999, read the file /proc/9999

Bash `wait` command, waiting for more than 1 PID to finish execution

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问题 I recently posted a question asking if it was possible to prevent PID's from being re-used. So far the answer appears to be no. (Which is fine.) However, the user Diego Torres Milano added an answer to that question, and my question here is in regards to that answer. Diego answered, If you are afraid of reusing PID's, which won't happen if you wait as other answers explain, you can use echo 4194303 > /proc/sys/kernel/pid_max to decrease your fear ;-) I don't actually understand why Diego has

Get process name by PID

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问题 This should be simple, but I'm just not seeing it. If I have a process ID, how can I use that to grab info about the process such as the process name. 回答1: Under Linux, you can read proc filesystem. File /proc/<pid>/cmdline contains the commandline. 回答2: Try PSUtil -> https://github.com/giampaolo/psutil Works fine on Windows and Unix, I recall. 回答3: For Windows A Way to get all the pids of programs on your computer without downloading any modules: import os pids = [] a = os.popen("tasklist")

设置Hadoop+Hbase集群pid文件存储位置

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【推荐】2019 Java 开发者跳槽指南.pdf(吐血整理) >>> 有时候，我们对运行几天或者几个月的hadoop或者hbase集群做停止操作，会发现，停止命令不管用了，为什么呢？因为基于java开发的程序，想要停止程序，必须通过进程pid来确定，而hadoop和hbase默认的情况下，会把pid文件存储在Linux上的/tmp目录的某个目录下，进程名命令规则一般是框架名-用户名-角色名.pid，而默认情况下，linux的tmp里面的东西，一天会删除一次，所以把pid文件放在这里面，并不是长久之计，为了安全起见，我们还是放到一个固定的目录下最好，当然不能放在/tmp下如何配置避免把进程文件写到临时目录下面呢？一：Hadoop配置：（1）修改hadoop-env.sh 修改如下，如果没有下面的设置，可以直接添加： export HADOOP_PID_DIR=/ROOT/server/pids_hadoop_hbase export HADOOP_SECURE_DN_PID_DIR=/ROOT/server/pids_hadoop_hbase 上述配置，影响 NameNode DataNode SecondaryNameNode 进程pid存储（2）修改mapred-env.sh 修改 export HADOOP_MAPRED_PID_DIR=/ROOT/server

IIS Application pool PID

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问题 is anyone familiar with a way to get the Application pool that is associated with a process ID ? I am using Win32_Process to query the W3WP services and return the PID now I am trying to get the app pool associated with it. 回答1: If you are just using command line to figure it out ad-hoc you can do this too: The script is already placed in systemroot\system32 on Windows Server 2003 so simply go to your Command Prompt and type in iisapp.vbs (the .vbs is optional) and you'll have an instant list

How to get the PID of a process by giving the process name in Mac OS X ?

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问题 I am writing a script to monitor the CPU and MEM of any given process. For that i need to send in the name of the process to be monitored as a commandline argument. For example. ./monitorscript <pname> I need to get the pid of the process in the script so that i can use a ps -p <pid> inside. How do i get the pid of a process given its process name? I understand that there might be multiple processes in the same name. I just want to get the first process out of that list. 回答1: The answer above

How to get the PID of a process by giving the process name in Mac OS X ?

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How to get the PID of a process that is piped to another process in Bash?

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问题 I am trying to implement a simple log server in Bash. It should take a file as a parameter and serve it on a port with netcat. ( tail -f $1 & ) | nc -l -p 9977 But the problem is that when the netcat terminates, tail is left behind running. (Clarification: If I don't fork the tail process it will continue to run forever even the netcat terminates.) If I somehow know the PID of the tail then I could kill it afterwards. Obviously, using $! will return the PID of netcat. How can I get the PID of