I. Overview
This is the main lesson the teacher talked about what it?
- Introduction Linux operating system with features.
- Two different under the Linux operating system and GUI are displayed CLI, and what their classification and characteristics, as well as the role played by these characteristics.
- Then introduction about linux operating system shortcuts to switch on GUI and CLI.
- Set questions about everyday life in a password.
- Finally, what is the attitude and approach as well as some learning on this course will be talked about.
Two, Linux operating system with features
1, a single-purpose composition applet; applet composition complex tasks;
2, everything is a file
3, to avoid trapping user interface; (that is to reduce the involvement of the user program is running)
4. Save the configuration file as plain text format;
Third, under two different operating system Linux are GUI display and CLI, and what their classification and characteristics, as well as the role of these characteristics
CLI interfaces:
a command prompt, prompt, bash (shell)
#: root
$: regular user
command:
Syntax:
Command Options parameter
options:
short options: -
a plurality of options can be combined: -a -b = -ab
long options: -
Parameter: role of the object command
using credentials :( is through authentication of the user identity such that it can use the corresponding resource)
Four, linux operating system shortcuts to switch on GUI and CLI
ctrl+alt+f*；
The command line interface can be entered: startx &; into the graphical user interface
Fifth, the issue of setting a password in daily life
Password complexity rules:
10 ^ 6
36 ^ 6
62 is ^ 6
100 ^ 6
1, four categories using at least three characters;
2, long enough, is greater than 7;
3, using a random string;
4, periodic replacement;
5, sufficiently large cycle;
Sixth, some learning attitude and approach
First test certificate is not very important, important is that we can form a knowledge system, and be able to skillfully use the knowledge we learn to solve problems.
There is no question will not be, but we just do not have to spend time on this question above.