Linux

Hard links and soft links are an important concept in the Linux file system, which involves index nodes (index node, also called Inode) in the file system, and the index node object is one of the four basic concepts of the Linux virtual file system (

Default/Default Redhat Linux automatically uses SAR to capture system performance information and logs it to/var/log/sa Collect every 10 minutes and record cpu/memory/disk/network 2 files per day, such as number 13th, will produce sa13 and Sar1

1. Use the W command to view the process information that the logged on user is usingThe W command is used to display the names of the users who have logged in to the system and what they are doing. The information used by this command originates

First, the preparation of LNMP environment before constructionLNMP is the Linux system nginx+mysql+php this site server architecture, so need to download mysql,php, and nginx three sets of software.Mysql:32-bit:

Linux Application Development-process Managementa processOne component is the kernel object that the operating system uses to manage the process, and the kernel object is the place where the system uses the statistical information to hold the

gzip:. GZ, can only compress files, cannot compress directories gzip Somefiles: The original file is deleted when the compression is complete -D: Unzip -#: 1-9, specify compression ratio, default is 6Gunzip: Decompression gunzip somefiles.gz: Delete

This article summarizes the following commands:Wc:word Count-L: Show only the number of rows-W: Displays only the number of words-C: Only the byte size is displayedCut: (remove sections from every line of files) removes a fixed portion of each row

Kdump is a dump mechanism in the event of a Linux Kernel crash, and a simple understanding is that if Kernel crashes for some reasonduring system startup, Kdump will be responsible for logging the logs for troubleshooting reasons. in Linux

partition, format, verify, MountSplit: Partition fdiskFind the disk where the root directory is DF//dev/hdc2FDISK/DEV/HDC No numbersD:delete a partition N:add a new partition P:print the partition table Q:quit without saving changes W:write table to

In the above-mentioned Drive series blog, we have learned about blocking and non-blocking, asynchronous notification, polling, memory and I/O port access, concurrency control and other knowledge, the key device driver is relatively simple, this

What is a cluster?Cluster is a set of independent computer systems that form a loosely coupled multiprocessor system that communicates between processes over a network. Applications can deliver messages over network shared memory for distributed

hardware facilities for Linux hostsLSPCI found the hardware on the mainframe right now.[ email protected] ~]# Lspci [-VVN]options and number of references:-V: Displays specific information for many other PCI interface devices-VV: More specific

Useradd"function description": Linux System is a multi-user multi-tasking time-sharing system, any user who wants to use system resources must first request an account from the system administrator and then enter the system as this account. On the

Linux Server management is not as convenient as Windows Server Management, of course, Linux can also be visualized visual operation, I am accustomed to use the SSH command management operations, often encounter the site to generate a large number of

I. Linux system start-up process1. First computer power-on self-test, into the BIOS, through the MBR load bootloader, and then by the bootloader load kernel in memory to complete the decompression, then the control to the kernel, the kernel to

CentOS 7 installation command line Web browser In most cases, especially in the production environment, we usually use command lines without a GUI to install CentOS, in this case, we must have a command line browser that can view the website

Rpm package management in CentOS I. Overview RPM is the abbreviation of RPM Package Manager. u. s. e. the distribution versions of Linux, such as Turbo Linux, are all adopted. software packages packaged based on this standard provide convenience for

Set up nfs service in CentOS 6.4x64 Network File System (NFS) is a mechanism for attaching partitions (directories) on a remote host to a local system over the network. With support for network file systems, you can operate on the shared partition

Centos 7 supports ntfs and exfat (fat64) file systems FUSE: Filesystem in Userspace is a module used in Linux to mount certain network spaces, such as SSH, to the local file system. Rpm-Uvh

Linux-(15) YUM software Repository YUM (Yellowdog Update Modified) is an RPM front-end program designed to automatically resolve RPM dependency issues. Although it is convenient to manage software in rpm software packages, You need to manually