ccna commands

C ++ macro definition commands and macro definition commandsCommands starting with # In a program are pre-compiled commands. There are three types of pre-compiled commands: macro definition commands, file inclusion commands, and Conditional compilation

When writing operations scripts in Python, it is often necessary to execute the commands of the Linux shell, the commands module in Python is dedicated to invoking the Linux shell command and returning the status and results, here are the 3 main functions of the commands module: 1. Commands.getoutput (' Shell command ') Execute shell command, return result (Str

Article Title: Traditional network configuration commands and IP advanced routing commands. Linux is a technology channel of the IT lab in China. Includes basic categories such as desktop applications, Linux system management, kernel research, embedded systems, and open source. Knowing how to configure network commands is a must-have technique for general technic

Common linux commands and common linux commands Common commands Ls display file or directory -L list file DETAILS l (list) -A: List all files and directories in the current directory, including hidden a (all) Mkdir create directory -P: Creates a directory. If no parent directory exists, p (parent) is created) Cd switch directory Touch creates an empty file Echo c

Learn frequently-used Mac commands, assist iOS development, and frequently-used mac commands for ios Source: Jack_lin (@ Jack_Lin_IOS) Heavy technology Preface In the process of iOS development, you pay more attention to the efficiency of iOS development and are proficient in using common commands on Mac terminals. This allows you to better explore iOS developmen

The shell command in Linux is usually the execution step: the user enters the command in the terminal, the system kernel reads the value of the environment variable in the current user's environment variable path The value of the variable is the path of the command, the command path is more than one, The system then matches the command file to find from left to right in these paths until it is found and executed, and when the command is executed, the file path corresponding to the command is sav

Tags: mysql basic command and use of the Mysqladmin commandMysql --user,-u --host,-H --password,-P --port --protocol --database Database,-DMySQL Batch processing mode[Email protected] ~]# Vim/test.sqlCreate DATABASE TestDB;CREATE TABLE testdb.tb1 (ID int,name CHAR (20))[[email protected] ~]# MySQLmysql> \. /test.sqlQuery OK, 1 row affected (0.09 sec)Query OK, 0 rows affected (0.29 sec)mysql> drop database TestDB; #删除Query OK, 1 row affected (0.25 sec)mysql> show databases;+--------------------+|

Freemarker custom commands and freemarker commands 1 Overview Custom commands can be defined using macro commands, which is a concern of template designers. Java programmers can use the freemarker. template. TemplateDirectiveModel class to extend the definition of commands i

Linux commands-linux File and permission management commands-linux permission management 1. ubuntu tips: In ubuntu, you can press ctrl + alt + t to open the terminal, and press ctrl + shift + t to open the second terminal. Adjust the font in ubuntu terminal Font increase: ctrl + shift + plus sign Reduce Font: ctrl + minus sign After entering the vi/vim Editor, enter: set number in command line mode to displ

I. Linux basic management commands and Linux management commands 1. Shutdown and restart command (1) shutdown command: shutdown [Option] Time Option:-c. Cancel the previous shutdown command. -H Shutdown -R restart Example: shutdown-h now # shut down immediately, root User + 10 # shutdown in 10 minutes # Define the absolute restart time (2) Other shutdown commands