20165216 preparatory work 3 Linux installation and learning.

Linux Installation and learning

first, about the installation of Virtualbos and Ubuntu

For this installation, because there is no experience in installing the system, mostly follow the teacher's steps to carry out. In this installation, one of the larger issues that arises is the virtual machine system version, and there is no Ubuntu (64-bit).

At first I thought it might be that the program read failed, after restarting found that there is still a problem, in the view computer properties of the diagram (e.g.)

and the number of computer bits verified by securable and whether a 64-bit virtual machine can be run

Finally, there is no problem, finally found in the blue ink Cloud class students raised and solved by another classmate, finally by modifying the security virtualization, select Enable, allow CPU hardware virtualization. Finally solved the problem.

Second, Linux command learning

The Linux command can perform many operations such as disk operation, file access, directory operation, process management, file permission setting and so on, which can effectively accomplish a lot of work.

One of the most common sign-in commands

Login is the login system, the use of permissions is all users

Format is login[name][-p][-h host name]

Host name can be started-run-input cmd query

The command format is

command [options] [arguments]//

1: Shortcut keys

• Ctrl+a: The cursor moves to the input wardrobe, equivalent to Home .
• Ctrl+e: The cursor moves to the end of the input line, equivalent to End .
• Ctrl+k: Delete from the cursor position to the end of the line.

 Alt+Backspace: Deletes a word forward.

2: Wildcard characters

* Match 0 or more characters;
？ Match any one character;
[List] matches any single character in the list;
[!list] matches any single character except the list unexpectedly;

3: About absolute paths and relative paths

Relative paths are relative to one location,
The absolute path begins with the partition of the hard disk.
For example:

There are three directories they all have subdirectories:
Root Linux Red
The root directory has Li and lo
The Linux directory has OO and PP
The Red directory has QQ and WW

And root.linux.red These three directories are under C + +

I am now in the PP directory under Linux,
The relative path to QQ in the Red directory is:
.. /.. /red/qq
The absolute path is: C:\RED\QQ

4: File Packaging and decompression

5: Help command

1.NAME: Short command, Data name description

Ls-list directory Contents:ls refers to the list of content in the current directory.

2.SYNOPSIS Z Executive Command Syntax (syntax) introduction.

3.DESCRIPTION: A more complete description of the number of seconds.

4.OPTIONS: For the synopsis section, there is an enumeration of all available option descriptions.

5.COMMANDS: Commands that can be executed in the program when the program is executed.

6.FILES: This program or data is used or referenced or connected to certain files.

7.SEE ALSO: Other instructions related to this command or data.

8.EXAMPLE: Some examples that can be consulted.

9.BUGS: Whether there is a related error.

Experience

For a language to learn, eat all is not, to slowly refine, the most important is to understand a large outline, and then slowly calm down to the heart, may not be skilled, but also can withstand the heart, very grateful to the teacher's teachings, from not a simple explanation of knowledge points, but from a large aspect let us go to learn, To understand. I can learn more and better!

20165216 preparatory work 3 Linux installation and learning.