Linux

01. View Swap Space = FreeCached (cache): refers to the reading of the data stored in memory, when read again, without reading the hard disk and directly from memory read,Accelerates the reading process of the data.Buffer: When writing data, the

Pre-configuration:in Root Identity Login .Exit Click Other and log in to root.Modify the host name and restart.Vim/etc/sysconfig/networkChange to Node1Vi/etc/ssh/sshd_configFind the following and remove the comment "#"Rsaauthentication

The previous blog describes the service management of Linux, whether it is installed in the RPM package services, or through the source package installed services, the Universal boot service method can be through/absolute path/Start script name

01. Add a new hard drive02. View NEW Silver plate = fdisk-l03. Use the fdisk command partition = = Fdisk/dev/sdb　　　　Press N: New partitionHint: E extended: Extended partitionP primary partition (1-4): Primary partitionPress P: Select Live partition (

Wget is the most commonly used download command of Linux, the general use is: wget + space + the URL path to download the fileExample: # wget http://www.linuxsense.org/xxxx/xxx.tar.gzSimply say the-c parameter, this is also very common, you can

I believe many of the small partners who are ready for Web development and testing want to know about the common commands of Linux.First of all, I'll show you the commands, a basic impression, and then go on.Common Commands and explanations

Process scheduling:A kernel subsystem that allocates a finite processor time resource between the running state processes.A scheduling policy1 Process TypeI/O consumption process: Most of the time is used to submit I/O requests or wait for I/O

A critical area and competitive conditionsCritical section: Access and manipulate code snippets that share data.Race condition: Multiple execution threads are in the same critical section.　　　　In a competitive condition: the data or the resource

An atomic operationInstructions are executed atomically-the execution process is not interrupted.1 Atomic integer OperationsThe atomic operation function receives the operand type--atomic_tDefine atomic_t v;Initialize atomic_t u = atomic_init

01. Statistical File System occupancy = DF [option] [user name]-H: Display capacity-A: Show all file system Information-T: Show file system type-M: Display capacity in megabytes-K: Display capacity in kilobytes02. Statistics directory or file size =

Grammar Test EXPRESSION[EXPRESSION][[EXPRESSION]]1. Numerical test-eq is equalWhether the-ne is unequal-GT is greater than-ge greater than or equal to-lt is less than-le less than or equal to2. String test= = is equal to! = Does not range> is

SVN creates a new project in the Linux environmentFirst, Preconditions:1) a server with a Linux system installed, 123.*.*.292) The server is installed on the SVN, I server's SVN data installation directory address:/application/svndataSecond, create

Do your own exercise on user Configuration today and then find a problem:The SU user1 is displayed after:[email protected] ~]# su user1-s/bin/bashbash-4.1$And not normal.[email protected] ~]# su user1[Email protected] root]$After solving the

1. OverviewTMPFS is a derivative of Ramfs, Ramfs is a ram-based file system that cannot use swap space, TMPFS can dynamically free up space and can use swap space. Ramfs does not control the size of the memory used to easily explode the memory,

Linux runs from 0~6, a total of 7.0: Turn off the machine. The system default run level cannot be set to 0, otherwise it cannot be started.1: Single user mode, only allow the root user to maintain the system.2: Multi-user mode, but cannot use NFS

wget deploymentJDK Website: http://www.oracle.com/technetwork/java/javase/downloads/jdk8-downloads-2133151.htmlSelect the downloaded version on the official website:Red section for, bypassing user authenticationwget

A long time ago in the Linux environment to learn python, today is nothing to do the first Python3 installed.I use the Linux system is centos6.5, the default with Python2, but Python2 and Python3 is still a big difference, so use Python3 as a

Install zabbix, Install the plug-in case of installation errorsYum install-y autoconf automake imake cmake gcc-c ++ libaio-devel bzr bison expat-devel libtool ncurses5-devel gd-devel libjpeg-devel libpng-devel libxml2-devel bzip2-devel

HTTP status code summary and http Status SummaryChapter 1 common status codes 200-the server returns the webpage successfully 404-the requested webpage does not exist 503-server timeout  1.1 temporary response 1xx indicates the status code of the

Common linux commands, In linux systems, commands must be frequently used, and some commands may not be remembered, so it is very troublesome to search for them on the Internet. So here I will record the commonly used commands, and I will add new