Ubuntu server configuration and ubuntu server configuration ssh

php editor Baicao introduces you to Ubuntu server configuration and Ubuntu server configuration SSH method. As a popular Linux operating system, Ubuntu is widely used in server environments. When configuring Ubuntu server, we need to pay attention to some important steps, such as network settings, security settings, software installation, etc. Configuring SSH is to achieve the needs of remote access and management of the server, and to ensure the security and convenience of the server. This article will introduce in detail the steps to configure Ubuntu server and configure SSH to help you easily complete the establishment and management of the server.

Ubuntu server configuration

Ubuntu server configuration refers to a series of settings and optimizations on the server after installing the Ubuntu operating system to ensure the server's Proper operation and safety.

We need to update the packages and systems on the server. Use the following command to update the package list and install available updates:

```

sudo apt update

sudo apt upgrade

Next, we can choose to install and configure the required server software, such as Apache, Nginx, MySQL, etc. These software can be installed and configured according to specific needs.

We can also configure the firewall to protect the server from malicious attacks. The default firewall tool used by the Ubuntu server is ufw (Uncomplicated Firewall). We can use the following command to configure ufw:

sudo ufw enable

sudo ufw allow

`` is the port number you want to open for access.

We can perform some other server optimizations, such as disabling unnecessary services, configuring automatic updates, etc.

Ubuntu Server Configuration SSH

SSH is an encrypted network protocol that allows secure remote login and file transfer on unsecured networks. Configuring SSH on the Ubuntu server allows us to Remotely access the server via SSH client and perform file transfer and remote management.

We need to install the OpenSSH server package. Use the following command to install the OpenSSH server:

sudo apt install openssh-server

After the installation is complete, we can edit the SSH configuration file To make changes, use the following command to open the SSH configuration file:

sudo nano /etc/ssh/sshd_config

In the configuration file, we can change the port number of the SSH server and the allowed users , login method, etc., ensure that the port number of the SSH server is set to a secure non-default port, and disable remote login of the root user.

After completing the configuration, we need to restart the SSH server for the changes to take effect:

sudo systemctl restart sshd

We can use the SSH client to connect to the Ubuntu server, in the terminal Use the following command:

ssh username@server_ip -p port_number

`username` is your username on the server, `server_ip` is the IP address of the server, `port_number` is SSH The port number of the server.

After entering the correct username and password, you will successfully connect to the Ubuntu server and can perform remote management and file transfer.

Shared for you

Linux system has a very useful command called `grep`, which is used to search for a specified pattern in a file. To find a text file containing the keyword " ubuntu" line, you can use the following command:

grep "ubuntu" filename

`filename` is the file name you want to search, and the `grep` command will output the keyword "ubuntu" of all rows.

This command is very practical and can help you quickly locate and search the content in the file.

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