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How do I install Jdk tools on a Debian 9.4 system? In view of this problem, this article introduces the corresponding analysis and answers in detail, hoping to help more partners who want to solve this problem to find a more simple and feasible way.

Create a new Vmware virtual machine

It's relatively simple. Skip this one.

Install Debian9.0.4 in Vmware

Select ISO image in the newly created virtual machine

Of course, you can refer to this article: https://www.yisu.com/os/619150.html

Start the virtual machine and see the following installation interface

The options are:

Graphical interface installation

Installation

Advanced option

Help

Speech synthesis installation

We choose intall (if you need to install the graphical interface, you can choose the first one), we will enter the language selection interface.

Select "Yes" for the next operation, and then go on to the next step.

If you need to enter a domain name, you can enter your own domain name, if it is not available, you can use localhost or it is empty.

Set root account password and user account password

When dividing the disk, choose the option according to your own needs, this installation is to choose "use the whole disk".

Next, you can choose to install according to your own needs. Such as whether to use network mirroring or not.

After the installation is completed, restart the virtual machine to enter the login interface. At this time, the default is the graphical interface. Click "activity" in the upper left corner after entering the system.

Enter terminal in the search bar and click the terminal to enter the terminal.

After the installation is successful, you will be prompted to use the sudo command:

This error occurs because the basic operating system does not have its own sudo, so we need to solve it ourselves.

The solution is as follows:

Use the $su root command to enter administrator privileges

Install sudo using apt-get install sudo

Resolve "xxx is not in the sudoers file. The matter will be reported".

When a normal user enters sudo XXX at the command line, the following error occurs:

The meaning of the sudo command is to enable the current user to execute the command as root, but not all users can execute sudo, because all authorized users are in / etc/sudoers. So we can add permissions to the user by editing the / etc/sudoers file.

Because the file is 0440 and permissions are read-only, use: wq! Force save.

Opening and closing of graphical interface

After the installation is successful, the default entry is the graphical interface, and we hope that the next operation will be done in the command line interface. Therefore, you need to close the graphical interface and refer to the specific closing process.

I can't afford to play with a virtual machine under 32-bit xp. Linux takes up memory by leaps and bounds these days, if you want to have gnome,kde. If you open two virtual machines at random, you will have more than 2 gigabytes of memory, and you will start to climb virtual memory and get stuck. Fortunately, the first time to learn linux is from the command line, if the debian boot directly into the command line, then about 128m of memory will be more than enough.

Linux under redhat system can be easily cut back and forth through init 3 init2~5 5. Today, it seems that all init2~5 under debian system will open gdm3 by default, so this trick doesn't work.

The first thing that comes to mind is

/ etc/init.d/gdm3 stop

But this is still not concise enough.

The second idea is to turn off the gdm3 service and use the command

Update-rc.d gdm3-f remove

Delete all gdm3 related scripts in the rcX.d folder, so that there will be no graphics menu after boot.

The final method is to change grub, modify / etc/default/grub

GRUB_CMDLINE_LINUX_DEFAULT= "quiet [b] text[ / b]"

And then

Update-grub2

In this way, an ordinary user logs in in command mode.

If you suddenly want to use a graphical interface, then

/ etc/init.d/gdm3 start

Install SSH Server

At the debian command line, type $sudo apt-get install ssh openssh-server to install SSH, and after installing SSH, we can use putty or xshell to connect to the debian in the virtual machine.

To connect to a virtual machine, you need to know the Ip address of the virtual machine. You can view the local IP using ifconfig under linux, but the following error occurs when you use it for the first time under debian:

This is because the debian system does not have its own network package, so you need to install it yourself. By using the following command:

$sudo apt-get install net-tools

After entering the above command, you can use it normally:

Install JDK

Download JDK

You can use the physical machine to download and then upload using tools such as FileZilla.

You can also use the wget command to download directly from the network, and this tutorial uses the second method.

Install JDK

Decompress jdk

Configure environment variables

The path to the bin directory of jdk is: / home/xuda/jdk8/jdk1.8.0_171/bin. Next, you need to add environment variables.

-Editing system environment variables

$vi / etc/profile

/ / append the following information to the file (root permission is required)

Export JAVA_HOME=/home/xuda/jdk8/jdk1.8.0_171/

Export CLASSPATH=.:$JAVA_HOME/lib/dt.jar:$JAVA_HOME/lib/tools.jar

Export PATH=$JAVA_HOME/bin:$PATH

-load the configuration just now

$source / etc/profile

-verify the configuration result

$java-version

Install the GCC compilation environment

Download the gcc source code

This tutorial downloads using the following source code

Http://ftp.tsukuba.wide.ad.jp/software/gcc/snapshots/8-20180504/

You can download it to the physical machine first, and then upload it to the virtual machine using tools such as FileZilla.

Install dependent libraries

$apt install build-essential libgmp-dev libmpfr-dev libmpc-dev

Compile GCC

Decompress XXX.tar.xz

Because the downloaded package ends with .tar.xz, you can know that the package has been compressed in two layers, with xz compression on the outside and tar compression on the inside. So it needs to go through two layers of decompression.

/ / decompress the first layer

$xz-d gcc-8-20180504.tar.xz

/ / decompress layer 2

$tar-xvf gcc-8-20180504.tar.xz

That's when we get the decompressed file.

Compilation and installation

/ / 1. Enter the directory

$cd gcc-8-20180504 /

/ / 2. Compile, automatically generate makefile files

$. / configure-disable-multilib

/ / 3. Run the following command

$make

/ / 4. Wait for a period of time before running

$make install

/ / 5. Restart, enter

$gcc-version

In addition, there are several ways to install

1.apt-get install gcc

2.apt-get install make

3.apt-get install gdb

4.apt-get install build-essential

-installation reference address

Install MySQL

Referenc

In fact, this step can be installed directly using the apt-get toolkit. The purpose of the apt-get toolkit is to simplify the operation of Linux, and the effect is the same.

Download the installation package

This tutorial is to install Mysql

download

$wget https://cdn.mysql.com//Downloads/MySQL-8.0/mysql-8.0.11-linux-glibc2.12-x86_64.tar.gz

Decompression

$tar-zxvf mysql-5.7.22-linux-glibc2.12-x86_64.tar.gz

Add user combination user

/ / add a user group

$groupadd mysql

/ / add user mysql to user group mysql

$useradd-g mysql mysql

Installation

Create a new data folder under the mysql directory to store data

$mkdir data

Some tutorials may be installed using mysql_install_db. After 5.7, mysql_install_db was abandoned and replaced by mysqld-- initialize.

$mysqld-initialize-basedir=/home/xuda/mysql/mysql-5.7-datadir=/home/xuda/mysql/mysql-5.7/data/

/ usr/local/mysql/bin/mysqld: error while loading shared libraries: libaio.so.1: cannot open shared object file: No such file or directory error occurred during installation

Solution: $apt-get-f install

-modify directory permissions

$chown-R root.

/ / mysql users only need to be the owners of all files in the mysql-5.7.20/data/ directory

$chown-R mysql data

Copy startup file

$cp support-files/mysql.server / etc/init.d/mysqld

$chmod 755 / etc/init.d/mysqld

$cp my_print_defaults / usr/bin

-Editor / etc/init.d/mysqld

/ / modify the following:

Basedir=/usr/local/mysql-5.7.20/

Datadir=/usr/local/mysql-5.7.20/data

Port=3306

/ / you can use the ftp plug-in of Nodepadd++ when modifying files, which is more convenient.

Start the service

$service mysqld start

Log in

$mysql-u root-p

You don't have a password to log in for the first time. You can change the password later using the following command

Mysql > use mysql

> mysql > update user set authentication_string=password (New password) where user='root'

This is the answer to the question about how to install Jdk tools in the Debian 9.4 system. I hope the above content can be of some help to you. If you still have a lot of doubts to be solved, you can follow the industry information channel for more related knowledge.

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