what lock file

You need to determine whether iptables is enabled. It is difficult to start at first, so you can think about how to start iptables. in RedHat, it is easy to think of/etc/init. d/iptabes start. Let's take a look at the startup script: Start (){#

This article uses the GPRS module in Linux to implement wireless Internet access. The code and method are difficult to understand, so you must read the code patiently. I believe you can learn a lot.   Dial-up Internet access through GPRS module in

Why do php realpath and file_exists return null characters instead of php? the result is pulled to get php, a php program is downloaded, and the environment is configured. System environment: window2003 + IIS6 + FastCGI + PHP5.3.4 Index. php in

Differences between fcntl (), lockf, and flock in linux. What are the differences between fcntl (), lockf, and flock in linux? what are the differences between fcntl (), lockf, and flock? the functions of lvyilong316 are used to lock files? First,

In the process of writing web applications, we often have to deal with databases, such as database access and SQL server that we often use. When connecting to these databases, the system will often give us something like this" 80004005"Errors, these

CentOS6.5 for rsync + inotify Real-Time Synchronization 1. Architecture Server: 192.168.202.135 Client: 192.168.202.129 2. rsync server installation and configuration yum install rsync -y # Installing the rsync Service Provide the configuration file

Seven Linux commands that are not frequently used but are very powerful 1. sudo !! Command If you run the command without a specific sudo command, an error is returned. Then, you don't need to rewrite the entire command, just enter '!! 'To capture

VIP cannot be started normallyDescription: Our environment is 2 node RAC, and node 1 is down due to physical faults.In this case, I want to start the VIP of Node 1 from node 2 so that the single node is transparent to the user program. [Oracle @

RSYNC software introduction:Rsync is a data image backup tool in unix-like systems. It can be seen from the software name-remote sync. Its features are as follows:Images can be used to save the entire directory tree and file system.It is easy to

Bring you into the rsync worldGuideRemote synchronize (Rsync) is a remote data synchronization tool that allows you to quickly synchronize files between multiple hosts through the LAN/WAN, or use Rsync to synchronize different directories on the

Install and configure Smokeping in CentoOS As the company needs to monitor the network quality of the data center, it is helpless to install smokeping. Since most of the online tutorials are in the old version, today I will discuss the process of

Rsync is a backup tool for data images in Unix-like systems. Generally, it comes with Linux systems. [Check whether shell> rpm-Qa | grep rsync] Server: 192.168.1.2 synchronization Directory:/home/source Client: 192.168.1.3 synchronization

After a few years of blog writing, the middle part of my blog writing has been stopped, and some of the content has been written. In order to prevent the valuable stuff from sinking into the sea, I have made this index. Enjoy it.   ASP. NET Website

  Yesterday, I changed the Host Name of the PC. When I started the VM today, an error was reported:   Error: SCSI reservation for Virtual Device "scsi1: 1" cannot be enabled because the disk "F:/Vm/racshare/OCR. vmdk "is being used by another

From: http://charette.no-ip.com: 81/programming/2010-01-13_posixsemaphores/# Problem The problem with POSIX semaphores Summary It has been a number of years since I 've used named semaphores. it cocould be that the last time I used a named

1. error information (I do not need to translate the error information into Chinese. Thank you for your understanding) Microsoft ole db provider for ODBC drivers error '000000' [Microsoft] [ODBC Microsoft Access 97 driver] the Microsoft Jet Database

To work properly, the daemon should be implemented as a single instance, that is, to run only one copy of the daemon at any time, because the daemon needs to access a device. The file lock mechanism is used here. If the daemon creates a file and

Detailed description of semaphores in UNIX multi-user systems ::: Author: Unknown resending from: Network clicks: 201 updated on: Article entry: Admin ::: [Font:] Resource

In order to effectively control the communication process between multiple processes and ensure the orderly and harmonious communication process, the OS must provide a synchronization mechanism to ensure effective collaboration between processes.

To meet the requirements, the previous rsync timed PUSH Service cannot meet the actual needs. Environment Introduction: The nginx cluster of a website is set up because the number of website content is updated frequently, but it takes a lot of