Linux

I. IP Fundamentals1.ipv42 binary 32-bit-----10-binary172.25.0.10/255.255.255.0172.25.0.10:ip Address255.255.255. 0: Subnet maskNetwork Bit Host BitNetmask 255-bit corresponding IP bit for network bitSubnet mask 0 corresponds to the IP bit master

A regular expression is a string pattern match that uses a flexible, powerful, and simple way to control a string.1. Using grep for string matchingTest text 1.txtHelloworldhaa 12345678 [Email protected]#$%^&*(ASDWEXVRSD,. /]];] {}_ () ^%asdasdasdThe

01. Do not log on to the management system with root, and log on as a normal user through sudo authorization management. 02. Change the default remote connection SSH service port, prevent the root user from connecting remotely, or even change the

Command:SshCommand parameters:-L Specify login user -p set port number -F to run in the background, and recommended plus-n parameter Ñ REDIRECT standard input to/dev/nullto prevent reading standard input - N do not execute remote command, only do

I. The basis of the process:1, program : Program is a number of stored on the disk of the order of the set of instructions;2, process : Process is a process of implementation of the program;3, the relationship between process and procedure : ①, the

Top Iostat-x 1 10freeuptimecat/proc/cpuinfocat/proc/meminfosrc1. View DiskDf-h2. View memory SizeFreeFree [-m|g] Press MB,GB to display memoryVmstat3. View CPUCat/proc/cpuinfoJust look at the number of CPUs grep "model name"/proc/cpuinfo | Wc-l4.

Partitioning and formatting of disksWhat is a disk partitionDisk partitioning refers to the logical partitioning of physical media on a hard disk. Partitioning a hard disk into multiple partitions is not only beneficial for managing files, but

Using the command scriptEnter script Xxx.log at the command line, generate the Xxx.log file in the current directory, and then the output from the command line will be saved to the Xxx.log file, and when you want to end the save, enter the Exit

This command is performed by default in the CentOS environment, unless otherwise specified.1. View IP:Ifconfig2. Create a specified user and assign to a group: Create user users and assign to root groupUseradd-g Root User3. Modify the password for

/etc/passwdUser InformationRoot:x:0:0:root:/root:/bin/bashUsername: password (both x): Uid:gid: User's full Name: Home directory: Shell/etc/shadowPassword informationRoot:$6$j41ctqzm$dp...:17363:0:99999:7:::Username: Password (encrypted): Last

1.1LinuxPartitioning Method1.1.1General Partitioning method One, the data is not very important description /boot 200m boot information for the kernel and system /swap

Linux operating system Linux operating system Important commands Shutdown–r now restarts the operating system, prompting other users Shutdown–h now restart the operating system Shutdown–h 20:25 Setting the system shutdown time

LVM2:Lvm:logical Volume Manager, Version:2The Dm:device Mapper device mapping component, which organizes one or more underlying block devices into a logical device module:Pv1+pv2+...>>vg>>lvThe VG will be PV into several pe,pe by default to 4M.After

Put the process into the background executionTAR-ZCF Etc.tar.gz/etc &Put the process into the background pauseDuring command execution, press CTRL + ZView commands in the backgroundJobs[[email protected] temp]# jobs[1]+ Stopped Top[2]-Done TAR-ZCF

Basic practice of iptables and basic practice of iptables Directory: I. Basic Rule exercises Ii. SNAT Source Address Transfer Iii. DNAT target address transfer  I. Basic Rule exercises   (1) Allow ssh (Port: 22)1 iptables -A INPUT -d 192.168.42.153 -

Install jdk_1.8 and linuxjdk_1.8 in linux Reprinted from http://blog.csdn.net/ldl22847/article/details/76056501. Download the jdk rpm installation package, here the jdk-7u4-linux-i586.rpm as an example to explain:

SCP error: WARNING: remote host identification has changed !, Scpidentification After google, the cause of this problem is that this is an ssh problem, said GkFool (the first time I used an SSH connection, an authentication will be generated

Jexus ~ Deployment in Linux environment, jexuslinux Jexus, Jexus Web Server (JWS), is an ASP. net web server, which is a non-Windows system such as Linux, Unix, And FreeBSD. net web server core program is enterprise-level ASP.. NET cross-platform

Create a shared folder in Linux. 1. view the ip address ifconifg; 2. Check whether the samba server is installed. rpm-qa | grep samba; 3. If the server exists, start service smb start; otherwise, install yum install samba; Samba-3.0.21b-2 // if this

Upload files to Baidu Network Disk through command lines in linux, and upload files in linux I. Environment: Centos release 6.9 Python 2.7.13 Ii. Install the tool bypy Sudo pip install bypy 3. Use bypy 3.1 authorization [Root @ ineedle ~] #