Linux

The Linux kernel has two types of images: a non-compressed kernel, called an image, and a compressed kernel called zimage. Depending on the kernel image, the startup of the Linux kernel is different at the beginning. Zimage is an image that has been

The daily development is basically in the Linux environment, the Bash command uses many, but writes the script the place is not many. Really write up, find the need to pay attention to the grammar, the use of habits of small problems or a lot.

Method 1:Synchronizing with a known time serverCopy the code code as follows:Ntpdate time.nist.govWhere time.nist.gov is a time server.Delete local time and set time zone to ShanghaiCopy the code code as

Linux application Development-socket a SocketSockets are network programming interfaces that are independent of specific protocolsIn the OSI model, mainly between the session layer and the Transport layerCharacteristics1 is a programming interface2

Scenario: XML file parsing into the library, and backupProblem: Disk IO exception, often 100%busy;Linux IO optimization methods:1, modify the disk hanging parameters, modified to writeback mode, for the file read frequently can be set noatime;2.

The Ifconfig command is primarily used to configure or display network devices, network Interface Controller network adapters, and networks. You can also specify a network interface address (IP address) using the Ifconfig command.Grammar:ifconfig

Linux Application Development-ThreadingThread Operation functionPrecautions :Header files: #include Build Note: link library-lpthread1 Creating Threadsint Pthread_create (pthread_t *thread, const pthread_attr, void * (*start_routine) (void *0, void

Replacing File Content in batches in linux1. Readily available materials on the Internet Format: sed-I "s/search field/replace field/g" 'grep search field-rl Path' Linux sed replaces strings in multiple files in batches Sed-I

Install Smokeping in CentOS6.5  Smokeping is a monitoring software for network performance monitoring. It can be used to monitor the network conditions of the IDC in its own company, such as latency, packet loss rate, and BGP multiline, the network

Linux Command ip Ip command syntax ip [OPTIONS] OBJECT ｛COMMAND | help｝OPTIONS is an option for modifying ip behavior or changing its output. -V: print the ip version and exit-s: output more detailed information. If this option appears twice or

On Centos6.5, Ansible manages WindowsInstall dependency packagesInstall PyCrypto: http://blog.csdn.net/eric_sunah/article/details/45826933Install paramiko (http://blog.csdn.net/zyz511919766/article/details/18355795)Install pywinrm: pip install http:/

Ssh does not require a password to log on to the linux server, and ssh does not require a linux Server In the following example, ssky-keygen and ssh-copy-id can be used to log on to a remote Linux host without a password.Ssh-keygen creates the

Install postgresql 9.4 and postgresql in Linux I. Preface PostgreSQL, also known as Postgres, is a relational database management system applicable to various Linux operating systems, Windows, Solaris, BSD, and Mac OS X. PostgreSQL follows the

In Ubuntu, the system prompts that the USB flash drive has no permissions but to read and write data. In ubuntu In Windows, the USB flash drive can read and write files normally (copy and paste files can be copied), but a file cannot be opened. In

Install a Web-based monitoring tool on Ubuntu 14.10: Linux-Dash Linux-Dash is a low-cost monitoring dashboard for GNU/Linux machines. You can install it! The Linux Dash interface provides a detailed view of all key information on your server,

Python script for Zabbix system email alert There are many ways to configure email alerts in the Zabbix system, such as the built-in mail and zabbix + msmtp + mutt. However, using a Python script is a simple and effective method. The main steps are

Add a datanode node to a Hadoop Cluster As the business expands, the company's first three nodes are not enough, so datanode needs to be added. Follow these steps to add a datanode node: 1. Create a user grid running Hadoop on the new datanode and

Configure Internet Mail alarm for Zabbix 1. Basic Conditions Zabbix server has been created and runThe zabbix client has been created and runs2. software packages to be installedCompile and install the msmtp package, and install the mutt package in

How to achieve SSH password-less Login Assume that you are a user "aliceA" on hostA and want to ssh to hostB as user "aliceB", but do not want to enter the password. So, you can refer to this tutorial to achieve ssd password-less login. First, you

How to configure a bridge on Ubuntu Question: I need to create a Linux Bridge on my Ubuntu host to share a NIC to other virtual hosts or containers created on the host. I am currently using Network Manager on Ubuntu, so it is best to use Network