Linux

User namespace is a new namespace for Linux 3.8 to isolate security-related resources, including user IDs and group IDs,keys, and Capabilitie S. The same user ID and group ID can be different (similar to the PID Nanespace) in the namespace. In other

Install MySQL, prepare before installationIf the MySQL user does not exist, then add the MySQL userGroupadd mysqluseradd-g MySQL MySQL　　MySQL compilation installationMake time is exceptionally longwget

1. What is a processA process is an application that is in progress in the operating system;2. How the graphics process is viewedGnome-system-monitor3. View the commands for a processPS Viewing processPS A current process-related process (contains

RM-RF + folder name Delete this directoryRmDir Delete Empty Directorymkdir + File creation directoryClear Clear ScreenPWD Current PathLl-i Display the file node, use Find./-inum XXX (node number)-print-exec RM-RF {}; Delete garbled filessudo mv +

Ctrl+shift+p shortcut key, open command panelSearch command Install Packages, select, EnterWait a few seconds, re-appear the panel, search the SFTP plugin, check EnterDisplays the installation success and prompts you how to use it. Official document

1. The significance of the existence of file permissionsOne of the methods of the system's lowest security setting;Ensure that the file can be used by the user corresponding to the operation;2. View of file permissionsFour methods:Ls-l file (file

Centos-6.9-x86_64-bin-dvd1.isoHttp://archive.kernel.org/centos-vault/6.9/isos/x86_64/CentOS-6.9-x86_64-bin-DVD1.isoCentos-6.8-x86_64-bin-dvd1.isoHttp://archive.kernel.org/centos-vault/6.8/isos/x86_64/CentOS-6.8-x86_64-bin-DVD1.isoCentos-6.7-x86_64-bi

IP parameter informationAs we all know, if the host wants to connect to the Internet, it must set up a set of legitimate IP parameter information. These IP parameters include: IP, Netmask, Gateway, Route, DNS, host name, and so on.Ip/netmask: It is

1. Install the deployment DNSYum Install Bind-ySystemctl Start namedSystemctl Enable namedSystemctl Stop FirewalldSystemctl Disable FIREWALLDMaster configuration file:/etc/named.confChild configuration files:/etc/name.rfc1912.xonesData

Linux application Memory layout1. From low address to high address: code snippet, data segment, BSS segment, heap, Stack (Bss,block Started by Symbol, AKA: Uninitialized data segment)2. Heap to high memory address growth3. Stack to low memory

Linux does not differentiate file types by extension, which is only visible to people; Windows relies on extensions to differentiate file types and then open them./dev Device Directory/Boot System startup directory/etc configuration File Save

#!/bin/bashSystemctl Disable FIREWALLDSystemctl Stop FirewalldSetenforce 0cd/etc/yum.repos.d/wget Http://mirrors.163.com/.help/CentOS7-Base-163.repoYum Clean AllYum-y Install Epel-releaseYum-y Install VSFTPDEcho ' user1 ' >>/etc/vsftpd/vu.listEcho '

How much do you know about block in Linux operations Basics ? Let's take a brief look at it today. 1. how does block come from? It was created when the file system was formatted.2. What does block mean? Where the data is actually stored3. What are

1.rsync Introduction rsync是类unix系统下的数据镜像备份工具，从软件的命名上就可以看出来了——remote sync。rsync是Linux系统下的文件同步和数据传输工具，它采用“rsync”算法，可以将一个客户机和远程文件服务器之间的文件同步，也可以在本地系统中将数据从一个分区备份到另一个分区上。如果rsync在备份过程中出现了数据传输中断，恢复后可以继续传输不一致的部分。rsync可以执行完整备份或增量备份。它的主要特点有：

Man command: View Help information' #man need to see the commandDate command: Show timeUsed to view and modify the system date and time#date +%y-%m-%d:%k:%M:s //指定输出日期和时间的格式18-08-15:15:20Clear command: Clear screenClear the current screen of

In the container environment a lot of time to determine what the underlying operating system is and what version, the Internet to find a handful, found some more useful commands, from other places to turn around, reference# uname-a # View

About RsyncRsync is a data-mirroring backup tool for Linux systems, using the Fast incremental Backup tool remote sync to remotely synchronize, support local replication, or synchronize with other Ssh,rsync hosts Rsync-A archive mode-V Verbose

Background Run Details: https://www.cnblogs.com/little-ant/p/3952424.htmlView ports, find commands, and moreFind file information by keyword: Cat | grep "guard" --R 7774040 -ef |grep Tomcat lsof-i:5300" keyword " pathReference:

mainly refers to the system kernel parameter adjustment in the Linux system for the service application, the optimization does not have the standard,optimization According to the actual needs is the most appropriate. 1) Edit the kernel configuration

1.lsof command (list open files, which lists the opened file, everything in the Linux system exists as a file)LS of-i: Port. Lists information for the specified port2.ps command (process status, which shows Progress state information)Watch-n 1