Python Full Stack road Day7

first edited September 24, 2017 9:54:58

Summary
I. Network management
Two. SSH Service
Three. Shell
Four. Meta-characters
Homework
Summary today

Summary

Citation: Mr. Haifeng

1. Network parameter Configuration
2. SSH Service
3. Shell
4. Metacharacters

I. Network management

2. temporarily Modify network configuration
   1. Modify IP address
      • ifconfig NIC name IP address
   2. Modify DNS
      • vim/etc/resolv.conf : Modify nameserver DNS address
   3. Configure Gateway
      • route Add (DEL) default GW gateway address netmask Subnet Mask: temporary settings (delete) gateway address
      • route-n View Settings
   4. Local resolution DNS
      1. /etc/hosts/: Local resolution Domain name, in the format: IP address hostname
      2. hostname: query hostname
      3. hostnamectl set-hostname host name: set hostname
4. Configuration file Modify Network configuration
   1. cd/etc/sysconfig/network-scripts/find the native NIC configuration file (e.g. Ens33), Vim Ifcfg-ens33
   2. Change the Bootproto to static
   3. The following parameters are added below
      • Ipaddr= Local IP
      • netmask= Subnet Mask
      • gateway= Gateway
      • Dns1=dns Address
        • Note that onboot must be yes, or the system will not load this parameter
   4. Systemctl Reload Network Reload NIC

Two. SSH Service

1. View ports
   • The Netstat-an:netstat command is used to print the status information of network system in Linux, which can let you know the network situation of the whole Linux system;
     • -A or--all: Displays all sockets in the connection;
     • -N or--numeric: Use the IP address directly, not through the domain name server
2. Network copy
   • SCP local file path destination IP: Destination path: remote Copy File
   • SCP Destination IP: Destination file path Local path: remote download file
3. SSH key
   1. Ssh-keygen: Making a remote access authorization key
   2. /root/.ssh/: Id_rsa is the key in the current home directory
   3. Ssh-copy-id-i Destination IP: Pass the key to the target host Id_rsa.pub
4. SSH configuration file
   • /ETC/SSH/SSHD_CONFIG:SSH configuration file

Three. Shell

1. What is a shell?
   • command interpreter, such as bash
   • Shell Script
2. Command priority
   • ==> Alias: Alias
   • ==> Compound Commands:if while for
   • ==> function: Functions
   • ==> build_in: Built-in
   • ==> Hash: View Hash table
     • -R Empty Hash table
     • Set: View defined variables and functions
     • unset function Name: Delete the definition of the function
     • Alias: Defining aliases
     • Unalias: Deleting aliases
   • ==> $PATH
   • ==> Error:command not found
3. Read-p ' Print content ' variable (name): Print prompt to print content, wait for input, and store input in Relpay, i.e. name = input
   • read–p "string" var1 var2...varn Note a space between "string" and var1
   • Echo & Variables

Four. Meta-characters

1. Special characters in Bash, and special characters that can be knocked out on the keyboard, have a special meaning, emphasizing one thing: metacharacters are interpreted by the shell

Homework

• No

Summary today

Python Full Stack road Day7