Linux

The backup script is as follows: #!/bin/bashExport Oracle_base=/data/oracleExport Oracle_home= $ORACLE _base/product/11.2.0/db_1Export ORACLE_SID=ORCLExport path= $ORACLE _home/bin:/usr/sbin: $PATHSOURCE

Verify that you have PHP installed before the installation step starts1. Create a folder and entermkdir/]# cd composer/2. Download the composer installer to the current directory" copy (' Https://getcomposer.org/installer ', ' composer-setup.php ');

Cut (option) (parameter) cut is a tool for working with text that can be used to remove specific fields.When selecting a field "1,3" represents the 1th and 3rd, "1-3" represents the first to the third, "3" stands from the beginning to the third, "3-"

The Linux sed command uses script to process text filesSED can process and edit text files according to script instructions.SED is mainly used to automatically edit one or more files, to simplify the repeated operation of the file, to write the

Sometimes when the software is turned off, the background process dies, causing the port to be occupied. The following is an example of JBoss port 8083 occupancy, which lists the detailed resolution procedures.Workaround:1. Find the Occupied port

Build an FTP server in Linux for the two working groups to keep the files in use. Disables anonymity. The first group uses the FTP account: FTP1, working directory in:/VAR/FTP/FTP1; the second group uses FTP2, working directory in:/VAR/FTP/FTP2.Two

I. Overview　　1. What is a login file In short, there are several files that record information about the system's activity, such as: when, where,(source IP), who (what service name), what action was done (message login). In other words:

(1) Run: When a process is running on a processing machine, the process is said to be in a running state. The number of processes in this state is less than or equal to the number of processors, and for a single processor system, there is only one

System UNAME-A # View kernel/Os/cpu informationCat/etc/issueCat/etc/redhat-release # Viewing the operating system versionCat/proc/cpuinfo # Viewing CPU informationHostname # View Computer nameLSPCI-TV # List all PCI devicesLSUSB-TV # list

Implementation ideas:1. Provide the client with input instructions;2. Provide the service side that returns the result of the execution instruction3. Find out the solution of the return result of the server one cannot receive allService-side code

The compression formats commonly used in Linux are. zip. gz. bz2. tar.gz. tar.bz2One,. zip1. Command formatZip compressed filename source file name (zip file to current directory)Zip-r compressed file name source directory name (compressed directory

How to view version information under Linux, including the number of bits, version information and CPU core information, CPU specific models, etc., the entire CPU information at a glance.1. # uname-a (Linux view version current operating system

To view the permissions for a Linux file: Ls-l file nameTo view permissions for a Linux folder: Ls-ld folder name (in the same directory)To modify file and folder permissions:sudo chmod-(on behalf of type) XXX (owner) xxx (group user) xxx (other

Brief introductionXargs can convert input content (typically passed through the command line pipeline) into parameters for subsequent commands, typically using: Command combination: In particular, some commands do not support pipeline input,

Vamei Source: Http://www.cnblogs.com/vamei Welcome reprint, Please also keep this statement. Thank you!Reference linksHttp://www.cnblogs.com/vamei/archive/2012/10/04/2711818.htmlRoleHow information is passed to the process.Usage ScenariosThe kernel

Install firstapt install -y nfs-kernel-server nfs-commonEditing a configuration filevim /etc/exportsAdd Content:/root/test *(rw,sync,no_root_squash)Parameter meaning:The first is the directory, and then the asterisk indicates that any IP can

Vamei Source: Http://www.cnblogs.com/vamei Welcome reprint, Please also keep this statement. Thank you!Reference addressHttp://www.cnblogs.com/vamei/archive/2012/09/19/2692452.htmlIconHardwareMaterial basis. Including CPU, memory, hard disk, NIC,

Inter-thread synchronization Sync: Work with one another to accomplish somethingMutual exclusion: Guaranteed access to shared resources integrity (you don't have me) Synchronization in POSIX threads: using semaphore implementations Semaphore:

These tasks that accept user input/COMPUTE/storage/output in Linux systems are provided by Linux system services to help us, and some of these system services need to beWaiting for the user's input or at any time to respond to user requests and so

Threads are a popular programming abstraction for parallel execution on modern operating systems. When multiple threads in a program are forked to execute multiple streams, these threads share specific resources (such as memory address space, open