Assume that the VPS uses centos, and then assume that the newer version 6.5 is used.
The desktop may not be installed on the VPS, but generally ssh will be installed, and the firewall will open port 22 by default.
Then start with ssh.
# 安装ssh,默认已安装好 # yum install ssh # 启动ssh服务器端 # service sshd start # chkconfig sshd on
ssh login
如果本地端是Linux # ssh root@192.168.1.1 其中root表示的是登录用户名,192.168.1.1为主机的IP地址,当然也可以使用主机名、域名来指代IP地址。 # ssh 192.168.1.1
will log in with the user name of the current client.
ssh passwordless login
But it is very troublesome to enter a password to log in every time. Is there a way for the server to determine my identity and pass the authentication directly without entering a password?
In addition to using password verification, ssh also provides a public and private key verification method. The client generates a private key and a corresponding public key, and then uploads the public key to the server. Below is a Linux example.
Generate private key and public key on the client (note, complete on the client):
# ssh-keygen -t rsa
-t specifies the key type to be created, the default is rsa, so only execute ssh -keygen is the same.
During this period, you will be prompted to enter the encryption password of your private key. If you need to completely get rid of the password, you can leave it blank and press Enter directly, otherwise you will need to unlock it locally every time you connect in the future.
After completion, two files id_rsa and id_rsa.pub will be generated in the ~/.ssh/ path in the current user's home directory, which are the private key and the public key respectively.
Next, you need to upload the generated public key to the server, and also execute the following code on the client.
# ssh-copy-id -i ~/.ssh/id_rsa.pub root@192.168.1.1
Root can be changed to the server user name you want to log in automatically, and 192.168.1.1 can be changed to your VPS host name or IP address.
Finally, log in to the remote server via ssh.
# ssh root@192.168.1.1
You can log in without a password at this time.
Related references: centOS tutorial
The above is the detailed content of How to use ssh remote connection in centos. For more information, please follow other related articles on the PHP Chinese website!

CentOS is an open source distribution based on RedHatEnterpriseLinux, focusing on stability and long-term support, suitable for a variety of server environments. 1. The design philosophy of CentOS is stable and suitable for web, database and application servers. 2. Use YUM as the package manager to release security updates regularly. 3. Simple installation, you can build a web server with a few commands. 4. Advanced features include enhanced security using SELinux. 5. Frequently asked questions such as network configuration and software dependencies can be debugged through nmcli and yumdeplist commands. 6. Performance optimization suggestions include tuning kernel parameters and using a lightweight web server.

CentOS is widely used in server management and web hosting. Specific methods include: 1) using yum and systemctl to manage the server, 2) install and configure Nginx for web hosting, 3) use top and mpstat to optimize performance, 4) correctly configure the firewall and manage disk space to avoid common problems.

CentOS is a stable, enterprise-grade Linux distribution suitable for server and enterprise environments. 1) It is based on RedHatEnterpriseLinux and provides a free, open source and compatible operating system. 2) CentOS uses the Yum package management system to simplify software installation and updates. 3) Support advanced automation management, such as using Ansible. 4) Common errors include package dependency and service startup issues, which can be solved through log files. 5) Performance optimization suggestions include the use of lightweight software, regular cleaning of the system and optimization of kernel parameters.

Alternatives to CentOS include RockyLinux, AlmaLinux, OracleLinux, and SLES. 1) RockyLinux and AlmaLinux provide RHEL-compatible binary packages and long-term support. 2) OracleLinux provides enterprise-level support and Ksplice technology. 3) SLES provides long-term support and stability, but commercial licensing may increase costs.

Alternatives to CentOS include UbuntuServer, Debian, Fedora, RockyLinux, and AlmaLinux. 1) UbuntuServer is suitable for basic operations, such as updating software packages and configuring the network. 2) Debian is suitable for advanced usage, such as using LXC to manage containers. 3) RockyLinux can optimize performance by adjusting kernel parameters.

The CentOS shutdown command is shutdown, and the syntax is shutdown [Options] Time [Information]. Options include: -h Stop the system immediately; -P Turn off the power after shutdown; -r restart; -t Waiting time. Times can be specified as immediate (now), minutes ( minutes), or a specific time (hh:mm). Added information can be displayed in system messages.

The key differences between CentOS and Ubuntu are: origin (CentOS originates from Red Hat, for enterprises; Ubuntu originates from Debian, for individuals), package management (CentOS uses yum, focusing on stability; Ubuntu uses apt, for high update frequency), support cycle (CentOS provides 10 years of support, Ubuntu provides 5 years of LTS support), community support (CentOS focuses on stability, Ubuntu provides a wide range of tutorials and documents), uses (CentOS is biased towards servers, Ubuntu is suitable for servers and desktops), other differences include installation simplicity (CentOS is thin)

Steps to configure IP address in CentOS: View the current network configuration: ip addr Edit the network configuration file: sudo vi /etc/sysconfig/network-scripts/ifcfg-eth0 Change IP address: Edit IPADDR= Line changes the subnet mask and gateway (optional): Edit NETMASK= and GATEWAY= Lines Restart the network service: sudo systemctl restart network verification IP address: ip addr


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