Shulou(Shulou.com)06/03 Report--

1. Lists Linux distributions by series and describes the connections and differences between different distributions.

(1) slackware:SUSE Linux Enterprise (SLES), OpenSuse desktop

(2) debian:ubuntu,deepin (depth), mint

(3) readhat:RHEL,Centos

(4) ArchLinux: lightweight and concise, following the KISS principle (keep it simple and stupid)

(5) Gentoo: extreme performance, does not provide the traditional sense of the installation program, download the source code to compile and install software on the local machine

(6) LFS:Linux From scratch self-made Linux

(7) Android:kernel+busybox (tool set) + java virtual machine

The kernel of Linux is open source software, and each Linux distribution is a different branch that is compiled and packaged several times based on the Linux kernel. The differences between different distributions are mainly reflected in the differences in the use of kernel versions, the differences in packaged software, and whether you need to pay for these differences. For example, the Linux kernel used by Ubuntu distributions is updated, RHEL is charged with technical support, and Centos is free, without technical support.

Different Branch reference: https://futurist.se/gldt/

two。 Install the Centos7.6 operating system, create a user name with your own name, and log in normally, take a screenshot of the main steps.

(1) Select "Install CentOS 7"

(2) set time, select hard disk, partition, etc.

(3) set hostname and network

(4) create a user name

(5) log in to the system

3. Configure the environment variable so that you can see the time when the command is executed when the history is executed.

Write the environment variable HISTTIMEFORMAT= "% F% T" to the ~ .bash _ profile configuration file

4. Summarize the philosophical thought of Linux

(1) everything is a file, including hardware, etc., which is reflected in the system in the form of a file.

(2) small, single-user programs, the function of each program is very simple

(3) linking programs to accomplish complex tasks together, which can be achieved through pipelines and redirects.

(4) avoid confusing user interface, the user's interactive terminal is a command-line interface, showing individual files without ambiguity.

(5) all programs, environmental variables and other data are stored in the text.

5. Conclusion Linux commonly used commands use the format, and use examples to illustrate. Such as echo, screen, date, ifconfig, export, etc.

The common command format for Linux is command + options + parameters. For example, when using the echo command, echo hostname displays hostname;echo `hostname` and hostname, and echo-e "\ a" will have an alarm sound.

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