ccna commands

Common Linux commands (version 2)-file management commandsFile Management commands Not recommended: Follow books like command book! There are about 200 Common commands. File naming rules: A) All characters except '/' are valid! B) It is best not to use these characters. 1. space character, Tab character, return character 2. Connector 3. Special symbols: @ # $ ()

Tags: absolute path installation file output Reference Declaration switch Directory View extLinux common commands (Common Commands for Linux)1. Statement, this article only write based on the Bash shell commonly used commands, if you encounter the command in the course of use, may be updated, the command has been replaced, please go to the official WIKI search or

One, the Linux CPU sizeCat/proc/cpuinfo |grep "model name" cat/proc/cpuinfo |grep "Physical ID"Description: Detailed information about each CPU can be seen in/proc/cpuinfo under Linux. But for a dual-core CPU, you will see two CPUs in the Cpuinfo. It is often mistaken for a two single-core CPU.You should actually differentiate between single-core and dual-core by physical Processor ID. The physical Processor ID can be found from Cpuinfo or DMESG. Flags if there are HT instructions to support Hy

The most commonly used help Command help -- helphelp cd to view the built-in command use infoman help cd to view the use of the built-in command to get help: man -- help Baidu google call (friend) Books Forum QQ group communication based on the principle that the problem can be solved in the shortest time, the longer the loss, the greater the loss. -- Help and help can both be used to obtain help information, but there is a significant difference: help: displays simple information about bash she

In linux, ifconfig, shutdown, and other commands cannot use the _ enable Shell command Java code. why cannot I use the ifconfig command in RedHatLinux5? after installing RedHatLinux5, I use some commands on the terminal, such: ifcinfig view local machine... In linux, commands such as ifconfig and shutdown cannot use the _ enable Shell command Java code. why canno

Comparison between Shell script commands and DOS batch processing commands-Linux general technology-Linux technology and application information. The following is a detailed description. [I = s] This post was last edited by lijiang at, January 10 ,. , In fact, the defective DOS batch processing file language can still write some powerful scripts, although they generally require external tools. therefore, i

Summary of common mysql commands and summary of common mysql commands# Modifying Field TypesAlter table 'table _ name' modify column ip varchar (50 );# Adding fieldsAlter table 'table _ name' add ip varchar (50 );# Add a primary key (primary key index)Alter table 'table _ name' add primary key ('IP ');# Add a UNIQUE (UNIQUE index)Alter table 'table _ name' add unique ('IP ');# Add an INDEX (Common INDEX)Alt

Linux svn commands and svn commands Check whether svn: svnserve -- version is installed Close svn service: killall svnserve Create svn Library: svnadmin create/opt/svn/repos Configure Automatic Start: Put svnserve-d-r/opt/svn/repos in the last line of/etc/rc. d/rc. local. Start svn: svnserve-d-r/opt/svn/repos If svn is already running, run it on another port: svnserve-d-r/opt/svn/repos -- listen-port 3391.

Differences between linux su and sudo commands: linuxsusudo commandsI. Use the su command to temporarily switch user identities1. Conditions and power of su The su command is a tool for switching users. How can this problem be solved? For example, if we log on as a normal user beinan, but want to add a user task and execute useradd, The beinan user does not have this permission, and this permission is exactly owned by the root user. There are two solu

Linux search commands and Linux search commands Which command Which is used to find system commands, such as ls and cat. It is searched from the folder specified by the PATH variable. When the specified folder contains a binary file with the same name as the command, the path of the file, that is, the path of the command.However, it seems that the file must be a

Some common Shell commands and common Shell commands Common system commands] Passwd [hostname]Change Password Useradd [hostname]Add User Su-Switch to the root user Ssh [hostname]Ssh connection Cd [directory]Go to the directory Sudo chown [username]Grant corresponding permissions to users Ctrl + cStop the current command (such as ping) Vi [filename]Use the vim edi

Common gdb commands and gdb commands When debugging a program, gdb is a powerful tool. The proper use of gdb can solve many bugs in the program. Gdb does not check syntax errors. It is a gcc or g ++ task. gdb does debugging. Note: (1) The gdb program name, such as [corefile], indicates the usage of commands. The content in [] is optional, that is, you can add or

Internal commands are transferred into memory when the system is started, and are resident memory, so the execution efficiency is high.The external command is the software function of the system, which is read into memory from the hard disk when the user needs it.Type can be used to determine whether a command is a built-in command Type:usage:type [-AFPTP] name [name ...][Root@linuxeye ~]# Type typeType is a shell builtin[Root@linuxeye ~]# type-p typ

Docker ~ Run multiple commands and docker multiple commands Recently, we are working on the deployment of jenkins pipeline. you do not want to install the dotnet sdk when deploying net core. For better portability, you plan to directly use the docker image of aspnetcore and run it through docker, at this time, there was a problem: docker run aspnetcore: 2.0. If you want to execute multiple sh

How to Use the built-in commands of the system to deal with manual antivirus, built-in commands to deal with manual It is better to manually use the tool that comes with the system to kill viruses than to install those software, that is, to use the command that comes with the system to manually kill viruses. The specific steps are as follows: 1. Be sure to back up the system process with TaskList before you

Common Oracle commands for creating users, tablespaces, and role commandsThe following articles mainly introduce how to view the table structure in common Oracle commands. If you are interested in the actual operating solution of how to view the table structure in common Oracle commands, you can view the following articles to better understand them.EDITDATA table

Mysql build and basic commands, mysql build commands I. mysql setup process Install mysql on ubuntu 1. sudo apt-get install mysql-server 2. sudo apt-get install mysql-client 3. sudo apt-get install libmysqlclient-dev 2. Basic commands-Logon, logout, addition of databases, addition of tables, deletion of databases, deletion of tables, display of databases, and

Summary of common Redis commands and common redis commandsService command:• BGREWRITEAOF asynchronously rewrite the append object• BGSAVE asynchronously saves the dataset to the disk• Client kill ip: port closes CLIENT Connection• Client list to obtain the CLIENT connection LIST• Client pause timeout pause client commands• Client getname obtains the name of the current connection• Client setname connection-

In the use of dd commands in linux disk management commands, the system administrator wants to know the functions of dd commands. Many users also know about most linux disk management commands, discuss the dd command with you. After reading this article, I believe you can get a satisfactory answer. Disk Quota: the prob

Overview and functions of NOP commands and roles of NOP commands /*************************************** ******************************* Author: Samson* Date: 08/03/2014* Test platform:* Linux ubuntu 3.2.0-58-generic-pae* GNU bash, version 4.2.39**************************************** ****************************/ In computer science, NOP or NOOP (No Operation or No Operation completed MED) is an assembly