Linux

(1) Creation and deletion of users under Linuxcommand to create a user: Useradd jfeduAfter this command is executed, it is created for the user: Create a home directory for users/home/jfedu Create a group with the same name as the userTo delete a

one, the installation commandYum-y Install VSFTPDIi. Creating an FTP user on Linux# useradd-s/SBIN/NOLOGIN-G ftp-d/Your directory-m username# passwd Users-s/sbin/nologin Disable user SSH loginTo which group-G is added-G can be added to multiple

I. Viewing file time and related commands1. Stat View file time[Email protected] ~]# stat install.log File: "Install.log" size:33386 blocks:80 IO block:4096 General file device:fd00h/64768d inode:7692962 links:1access: (0644/-rw-r-

Some of this information is from:Http://www.cnblogs.com/xiaocen/p/3717993.htmlDownload the Code First:https://www.kernel.org/pub/linux/kernel/v4.x/Unzip to/USR/SRC (it seems that the compilation kernel must be here)Enter/USR/SRCPerform:LN-SV linux-3.

Linux Shutdown Firewall command1) Permanent, no recovery after rebootOpen: Chkconfig iptables onOFF: Chkconfig iptables off2) immediate effect, recovery after restartOpen: Service iptables startClose: Service iptables stopIt should be stated that

1. User Category:Admin: 0Normal Users: 1-65535System User: 1-499 "dedicated to running background processes, no login required, no user association"General User: 500-60000 "a normal user created by an administrator for daily work and cannot manage

Shortly before learning Python, in the Windows environment has learned to install, debugging and so on, when learning to find a lot of configuration in the Linux environment, so install a Linux system for their own learning and memo.BodyAdd

For users who are unfamiliar with Linux, it is too low to use a command to check an efficiency. And the daily encounter problems reproduce the study is not too small, the summary of several often appearances of the order, take the daily positioning

This blog mainly introduces several common concepts in Linux　　　　kernal: Kernel : We know that the hardware of the computer includes: CPU, memory, external memory, etc.The system needs to use the kernel to unify the resource allocation! The kernel is

1. BackgroundIn reality, we need to learn existing software construction methods, or maintain old software, or add new features, or optimize performance,At this time the face of the code is not written by themselves, how to quickly know what the

First, install the FCITX1. Install the FCITX required componentssudo apt install fcitx fcitx-tools fcitx-config* fcitx-frontend* fcitx-module* fcitx-ui-* presage2. Remove redundant components (for non-KDE desktops only)Because the above installation

1, three addressesA logical address, used in a machine language instruction, to specify an operand or an address of an instruction.Linear address: 32-bit unsigned integer up to 4GB. A 64-bit CPU is a 64-bit linear addressPhysical Address: Memory

Transferred from: http://www.linuxidc.com/Linux/2015-02/112685.htmafter the file is frequently accessed under Linux, the physical memory is quickly exhausted, and when the program is finished, the memory is not released normally, but it is always

Vamei Source: Http://www.cnblogs.com/vamei Welcome reprint, Please also keep this statement. Thank you!Procedures and processesThe same program can be executed multiple times, each time in memory to open up a separate space to load, resulting in

Preface: Whether it is multithreaded programming or multi-process programming, it is necessary to control the synchronization and mutex issues between different threads or processes. Synchronization is a task that is performed by multiple processes

Linux Learning (1), Linux Learning ( 1. What is shell and bash? What is the difference between them? Shell is a user interface that interacts with Linux. Bash is a special case of shell, or an implementation. Bash: command line user interface

Compile and install the Apache httpd server and apachehttpd in Linux. Environment: ubuntu 16.0.4 Apache official website download Apache httpd compressed package: httpd-2.4.27.tar.gz, please confirm to install the make tool before installation, I

Analysis on the scale-up Operator 3: format conversion to redundant clustering and format conversion Clustering This course requires the completion of the expansion sub-Analysis Interpretation 1 Quality Control Experiment Design Dual-End sequence

Example of double quotes and single quotes in Bash shell, bashshell   #! /Bin/bash   Fruit = cot Area = beijing   # Output is invalid ot \ nbeijing Echo "$ fruit \ n $ area"   # Output is invalid ot \ beijing Echo "$ fruit \ $ area"   #

Common Linux commands,1. The most critical command ManEcho2. directory file operation commands Ls: view the file information or file information in the directoryDir:Pwd: print the current pathCd: Change pathMkdir: Create pathRmdir: delete pathCp: