Please use the command "netstat-ntlp | grepsh" to view it. The third column is ip:port, for example, 0.0.0: 22, which means that all network cards are monitored, and the port is 22.

You can also check the configuration file: cat/etc/ssh/sshd _ config | greport.

How to directly enter the user name and password when logging in with ssh under linux?

The default user name is root.

If you forget, you can enter single-user cracking.

Heat splitting method

After 1linux starts, press the E key on the keyboard to enter the grub menu interface.

2. When the grub startup screen appears (centos(2.6. 18-274**)), press the letter E to enter the grub editing state.

3. Move the cursor to the kernel line ... and then type "e" to enter the command line for editing.

Add a space s at the end of the kernel line, and then press enter.

Type "b" to start the system, that is, enter the single-user mode.

4. At this point, you can use the passwd command to change the password.

passwdroot

Restart after the change.

What is Song Seung Heon? How does Linux modify SSH port number?

1

Song Seung Heon is SecureShell.

Developed by NetworkWorkingGroup of IETF;

SSH is a security protocol based on application layer and transport layer.

The data transmitted by SSH is encrypted, which can effectively prevent the transmission process from being intercepted and ensure the security of data.

SSH data is compressed, so it can speed up the transmission.

1

First, check whether the SSH package has been installed in linux, and use rpm-QA | grepsash.

2. Confirm that the ssh service has been started.

3. Find the SShD _ config file in the /etc/ssh directory.

Edit and modify SSH port numbers

1. Using the VIvim editor, open the file sshd_config and search to find the port field.

2 Set the cursor to yy in port22, then copy a line on the keyboard P, and insert Edit 22 with port 2222.

After setting 3, wq saves and exits, indicating that port number 2222 has been added.

4. Of course, after the setup is completed, you need to restart the SSH service.

5. If you have set a firewall, please modify the rules for adding a firewall, or turn it off directly.

Matters needing attention

By default, SSH port is 22. If you want to modify, edit port 22 directly. Note that the front "#" should be removed, then saved and restarted.

How to use ssh to remotely log in to the host to execute shell scripts under linux?

The linux host logs into another linux server, and directly inputs: ssh account @IP address at the command prompt, for example: ssh Oracle @192.168.10.13, and then inputs the password according to the prompt. If everything is all right, enter the remote host.

How to make SSH service run automatically under linux?

Under linux, ssh service can be started and run automatically, which can be set by the systemctl command.

1. Set ssh to boot and start. Sudo is privilege elevation, systemctl is service manager, enable is the parameter of systemctl, indicating that startup and automatic operation are enabled, and ssh is the name of the service to be set. After the setting is successful, you can use chkconfig to check the startup status of ssh, and on means that the startup has been set.

2.ssh disables startup and self-startup. Sudo is to elevate the authority, systemctl is the service manager, disable is the parameter of systemctl, which means startup is prohibited, and ssh is the name of the service to be set.