Linux

　　Process ManagementProcess: Program instructions running in CPU and memory are code that executes dynamicallyParent/Child process: a process can create one or more child processesPID: ID number of the processPPID: Parent Process ID NumberLinux

The Linux directory structure, in which all directories are logically only one vertex, i.e./(root), is the starting point for all directories. Below the root is similar to the structure of an upside down tree.The Linux directory is organized by

Basic Linux command format:command [parameters] [path file]The contents of square brackets can be omittedTo view the command help means:Man command nameSummary of COMMON commands:1 mkdir Creating a directory Mkdir/data2 LS display directory or file

Linux Virtual Machine Foundation optimization1. System Environment View commandCat/etc/redhat-releaseUname-rUname-mDescription: System Environment CentOS Release 6.5 (Final) 2.6.32-431.el6.x86_642. Turn off the SELinux function

VirtualBox Install the network (remember to install the second NIC is set to host-only) A1, the first NIC default NAT mode is installed after the modification eth0 on onboot=Yes to go online B, Second NIC host-onlyfor local and Linux communication

Excerpt from Zhu Youpeng Teacher's public lesson video3, the use of the Editor VI (VI and VIM contact)What is an editor? The editor is a software, its main function is to edit. such as writing a file, writing code.Common editors in Windows, such as

1, in the Linux system backup files, in the Windows decompression appeared in Chinese garbled, this is actually a mistake, I use the win03 with the zip view Explorer directly copied, so there is this problem, we recommend the use of free 7-zip.2,

Linux boot script linux boot scriptUser-defined Boot program (/etc/rc.d/rc.local)The simplest and most convenient operation. Each time you start PHP ah, nginx ah bored to death, other ways to get shell Ah, connection ah, too cumbersome.The operating

A1, display the current time, the display format is HH:MM:SS, and saved to the file Time.txt file650) this.width=650; "Src=" https://s4.51cto.com/wyfs02/M00/08/00/wKiom1nY8yKxw-g0AAGwaEl9IG4446.png-wh_500x0-wm_ 3-wmp_4-s_1725245104.png "title="

1. The command line is more bandwidth-saving than the graphical interfaceThe 2.linux file size is indicated by default in bytes, 1kb=1024 bytes, 1 bytes 8 bits (1byte=8bit)3.linux Multi-line Comment:: AAABBBCCC!4.MV moving files to the directory: mv

First, study notesEAX accumulator EBX Base Address register ECX count register edx data register EBP stack base pointer esi--variable address register edi-- ESP stack top pointer EIP instruction pointer register CS code segment Register DS data

1.Linux Strictly case-sensitiveAll content in 2.Linux is saved as a file, including hardware. (All contents are documents)3.Linux does not differentiate file types by extension, but has a conventional extensionPrograms under 4.Windows cannot be

Vsftpd_ Local User modeRelatively anonymous, local users are more secureTo modify a configuration file:[Email protected] ~]# vim/etc/vsftpd/vsftpd.conf anonymous_enable=NO local_enable= Yes local_umask=022 write_enable=Yes

TAR-CVF Package Name Package (suffix. tar);-C new package file;-v display processing information;-F for normal file operation TAR-XZVF Package Name Unpack (suffix. tar); X unpack the package file;-Z Call gzip

Command:1.CHGRP: Change the group that the file belongs to2.chown: Change the file due person3.chmod: Permission to change filesHow to use:CHGRP:CHGRP [-r] Group name Directory name/file name-R is recursive, commonly used in directories, indicating

Tag: Boot does not show splash boot expired art image rhel6 verifyGrub.conf is related to the system startup key for resetting the password. The small case ...1, Introduction after Red Hat Linux7.2, the default boot loader changes from Ltlo to Grub.

1. Interrupt Processing architectureThe Linux kernel uses an array of IRQ_DESC structures to describe these interrupts by uniformly numbering all interrupts.array declarations are /linux/kernel/irq/handle.c, in which #define NR_IRQS - , defined in /

Linux is controlled by the number of link to delete the file, only if a file does not exist any link, the file will be deleted. In general, there are 2 link counters for each file: I_count and I_nlink. The meaning of I_count is the number of users

I believe most of my classmates are using Windows as much as I do, but as a developer, Linux commands are often used, and in the past we used virtual machines to install Linux, if the computer configuration is low, the basic card is not moving.

Ubuntu solves the problem of ipv6 hosts, ubuntuipv6 After switching from windows to linux, the first step is to modify hosts. Then we copied the ipv6 hosts on windows, but we found it was not easy. Later we switched back to the common hosts and