Linux

Life is a coffee table, which is filled with cups. The kernel is also a big coffee table, but the cup above it is a bug. Determining when a bug is being introduced is a critical step, and it is natural to use a binary lookup method, whether

What is methodologyThe first sense of the methodology is that it is a convoluted is a very hazy thing, obviously, learning itself is a very iffy thing, some people all day Sasa do not see how attentively can get very good results, and some people on

partition a disk and format it[Email protected] ~]# mkfs.ext3/dev/sdb2 Create a physical volume[Email protected] ~]# pvcreate/dev/sdb2 [Email protected] ~]# PVs PV VG Fmt Attr PSize pfree/dev/sda2 VolGroup lvm2 a--19.51g 0/dev/sdb2 lvm2---153.13g

Processes are one of the core concepts of modern operating systems and are used to allocate the use of systems (CPU, memory) resources. Understanding the Linux process and process switching knowledge, first to understand the difference between the

1. BackgroundIn the enterprise sometimes we to facilitate the installation of software, data management, we need to install software, data into a fixed directory, the disk is full of convenient expansion, if you need a/data directory storage data,

After logging into the system, enter the command under the current command window: LS/, you can view the system directory of the current systemThe following is an explanation of these directories:/bin:The bin is the abbreviation for binary, which

These days by the virtual machine Linux nat set up dizzy brain swelling, this time has been bridged mode can not take care of themselves, really enough, this time to say this encounter the strange phenomenon of the problem.This time is to

1. Compression decompression command: gzip,. gz formatThe gzip file name is compressed.Linux compressed into Windows can be decompressed, but under Windows compression to Linux decompression is not necessarily possible.(1) Only files can be

Classification of Linux ServicesIndependent serviceRPM Package default installation of services Linux Services Source Package Installation ServicesQuerying for Installed servicesRPM Package Installation Services: Chkconfig--listSource Package

Df-lhUsed: space already in useAvail: The space you can useMounted on: Mounted DirectoryAnd find the big file.Du is a command to see the disk under LinuxLet's start with a catalog to see the space footprintDU-SH/* First look under the root

Port:IPV4:UDP67, (client)ipv6:udp546, 547Configuration file:/etc/dhcp/dhcpd.confTemplate files:/usr/share/doc/dhcp-*/dhcpd.conf.exampleTo copy a template file to a configuration file:

Startup process:After the host is booted and the hardware self-test is performed, the boot loader in the hard disk MBR is read and loaded.The boot loader is responsible for booting the operating system on the hard drive, and depending on the startup

PS aux view All processesUser This process is generated by thePID Process ID%cpu the percentage of CPU resources that the process consumes%MEM the percentage of physical memory that the process occupiesVSZ This process consumes the virtual memory

We know the five components of the computer: input devices, output devices, storage, operators, controllers, which input we call the I/O device, the operator and controller called the CPU, memory such as memory, hard disk and so on. As long as the

1. PrefaceThis article describes the configuration items that are related to Linux kernel and startup under the ARM64 architecture.NOTE 1: The Linux kernel version used in this article series is " X Project "The use of" Linux 4.6-RC5 ", for specific

First, prefaceA qualified Linux driver engineer needs to have a deep understanding of the interrupt subsystem in the kernel, only in this way, when writing a specific driver:1. Correct use of the API provided by Linux kernel, such as the most famous

The Linux kernel consists mainly of 5 modules, each of which are:The process scheduling module is used to control the use of CPU resources by the process. The scheduling strategy is that each process can access the CPU fairly and reliably, while

first, the purposeAfter the kernel has loaded the initrd file, the necessary preparations are made for mounting the disk file system, including mounting the Sysfs,proc file system, loading the disk driver driver, and so on. Next, the kernel jumps to

Shell1. Special variables such as $# and $* List of special variables Variable Meaning $ File name of the current script $n Arguments passed to the script or function. N is

Application Load Balancing LVS (1): Basic Concepts and three modes, Server Load balancer lvs Directory:1. LVS Introduction2. How LVS-ipvs works2.1 VS/NAT Mode2.2 VS/TUN Mode2.3 VS/DR Mode2.4 Comparison of Three lvs-ipvs Modes3. ARP problems in