WSL2-Linux on Windows- (Part 2: Introduce basic tools)

This article is a continuation of: WSL2 ~ Linux on Windows ~ (Part 1: Introduction)

1.First of all

Summary of this article

In the first part, we introduced Ubuntu 20.04 with WSL2. The following environment will be prepared on Ubuntu-20.04.

1. Proxy settings
2. Package update
3. Prepare the environment to connect to Ubuntu by SSH (SSH from Windows environment to Ubuntu)
4. Introduce familiar tools (ifconfig, etc.)

2. Main story

2-1. Proxy settings (environment variables)

Set the proxy as needed. Looking at the github community, there seem to be two types of setting methods. https://github.com/microsoft/WSL/issues/1570

--Setting by environment variables --Settings for apt

Tools such as curl and wget also use proxies, so I decided to use environment variables.

(1) Editing ~/.bashrc

Command execution

cd ~/
vi .bashrc

~/.bashrc

export http_proxy=http://proxy-server:PortNumber
export https_proxy=http://proxy-server:PortNumber

(2) Log out & login to reflect environment variables

Log out

exit

Re-login

wsl -d Ubuntu-20.04

Reference: Settings for apt (not set this time)

sudo vi /etc/apt/apt.conf.d/proxy.conf

Acquire::http::Proxy "http://proxy-server:PortNumber";
Acquire::https::Proxy "http://proxy-server:PortNumber";

2-2. Package update

Package update

sudo -E apt-get -y update

"-E" is for inheriting and executing environment variables.

2-3. Prepare the environment to connect to Ubuntu with SSH (SSH server)

(1) Installation

Installation

sudo -E apt -y install openssh-server 

Execution result

Abbreviation
0 upgraded, 0 newly installed, 0 to remove and 74 not upgraded.

It's already in!

(2) Authentication method setting

/etc/ssh/sshd_Edit config

$sudo -E vi /etc/ssh/sshd_config 

Turn on password authentication

- PasswordAuthentication no
+ PasswordAuthentication yes

Security is loose because it is a local environment.

(3) Generation of host key

Key creation command

$ sudo ssh-keygen -A

result

ssh-keygen: generating new host keys: RSA DSA ECDSA ED25519

(4) Starting the service

Service start command

$sudo service ssh restart

Execution result

 * Restarting OpenBSD Secure Shell server sshd                    [ OK ]

(5) Login from the client

Windows command prompt

C:\>ssh -l [Ubuntu username] [Ubuntu IP address]
[A user]@[IP address]'s password:●●●●●●　　<=====Login password
Welcome to Ubuntu 20.04.1 LTS (GNU/Linux 4.19.128-microsoft-standard x86_64)

***Omitted***

Ubuntu comes with ABSOLUTELY NO WARRANTY, to the extent permitted by
applicable law.

[User]@[PC-NAME]:~$

2-4. Introduce familiar tools

In the early days, we didn't have the following basic commands that we were used to.

• ifconfig
• netstat
• brctl
• traceroute

I think that the above command does not exist because it has moved to the ip command, but I will introduce it because I want a familiar command.

(1) Install network related tools

command

sudo -E apt -y install net-tools <==== arp,ifconfig,netstat,rarp,route 
sudo -E apt -y install bridge-utils <==== brctl
sudo -E apt -y install inetutils-traceroute <=== traceroute

Finally

Summary

In order to create a comfortable usage environment, we will investigate and add the following. --Set SSH to start automatically --Make the proxy settings smarter (take over the proxy from the Windows side?)