How to use ssh to connect to a remote server from a Mac?
To connect to a remote server using SSH from your Mac, just run the corresponding command from the terminal. First open the terminal program (you can search through "Applications" → "Utilities" or Spotlight), and then enter the ssh username@server_ip format command to connect. If you want to specify a non-default port, add the -p parameter. If you want to log in without password, you can execute ssh-keygen to generate the key, ssh-copy-id to upload the public key to the server, and ensure that the server configuration allows key authentication. Common problems include network blockage, port not open, username errors and improper permission settings. It is recommended to use the ssh -v command to troubleshoot problems. Although the whole process is simple, you need to pay attention to key details such as firewall and file permissions.
It is not really complicated to connect to a remote server using SSH from a Mac. As long as you know the IP address and login credentials of the target server, you can quickly establish a connection through the terminal.
Open the terminal
The terminal program comes with your own on your Mac, you can open it in the following ways:
- Find Terminal in Applications → Utilities
- Or use Spotlight Search (Command Space) to enter "Terminal"
After opening it, you will enter the command line interface, and then you can enter the SSH command.
Connect using SSH command
The basic SSH command format is as follows:
ssh username@server_ip
For example, if you want to log in to a server with an IP of 192.168.1.100
with the user
name, the command is:
ssh user@192.168.1.100
After running, you will be prompted to enter the password, and you can complete the connection by entering it correctly.
If it is the first time you connect to the server, the system will prompt you to confirm the host fingerprint and enter
yes
to continue.
In some cases, the SSH port is not the default 22. For example, if it is changed to 2222, then -p
parameter is added to specify the port:
ssh -p 2222 user@192.168.1.100
Configure password-free login (optional)
If you often need to connect to a certain server, you can configure an SSH key to achieve password-free login. The specific steps are as follows:
Generate the local key pair (if not already):
ssh-keygen -t rsa -b 4096
Upload the public key to the server:
ssh-copy-id user@192.168.1.100
After that, you can log in directly without entering your password.
Note: The SSH configuration on the server must allow key login (
PubkeyAuthentication yes
), otherwise it will not take effect.Frequently Asked Questions
Sometimes the failure to connect may be caused by the following reasons:
- Network blockage: Confirm whether the server IP is correct and whether the local ping can be pinged.
- Port not open: Check server firewall settings to ensure SSH port is open
- Username error: Some servers only allow specific users to log in
- Permissions issue: Especially when logging in with a key, the permissions of the
.ssh
folder and key file should not be too loose. Generally.ssh
is 700, andauthorized_keys
is 600.
When encountering problems, you can use the
ssh -v
command to enable the detailed output mode to view the details during the connection process, which is convenient for troubleshooting.Basically that's it. The whole process is not complicated, but some settings are easy to ignore, especially the permissions and firewall parts, which will get stuck if you are not careful.
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