SSH service is installed, SSH Telnet and SSH scp command Detailed data transmission environment under Ubuntu

https://www.cnblogs.com/asyang1/p/9467646.html

SSH is the Secure Shell Acronym for establishing secure communication protocol in the application layer basis.

First, check the SSH service is started

Ubuntu is no default SSH service, so if you want to check SSH service is installed.

Open the terminal type the following commands:

1 $ ps -e | grep ssh
2 
3 7529 ? 00:00:00 sshd 4 7852 pts/1 00:00:00 ssh

If the input instruction is similar to the display shown in the figure, then the service is started SSH

Which represents sshd ssh-server is started, ssh ssh-client representation has started

Second, install SSH Server

Installing SSH client and server:

1 $ sudo apt-get install openssh-client
2 
3 $ sudo apt-get install openssh-server

Third, start the SSH service

After installation is initiated by commands:

1 $ sudo /etc/init.d/ssh start

After starting the SSH service using the following command to determine whether the correct start:

$ Ps -e | grep ssh

If the launch is successful, the result will be similar to the first step occurs in the terminal

Fourth, modify SSH port number

SSH default port number is 22, needs SSH port numbers are subject to change, and then run the following command to open the SSH configuration file:

1 $ sudo gedit /etc/ssh/sshd_config

It can be seen as shown below:

After modifying the port number (Port), restart the SSH service to take effect the following command:

1 $ sudo /etc/init.d/ssh restart

Five, SSH remote login

After the SSH service starts, it can remote login, login command format is: ssh account @IP address, for example:

1 $ ssh user@10.234.5.81

Which account refers to the U buntu login account

If you know the IP address can be viewed via the following command:

1 $ ifconfig -a

Found shown below at the inputs of the instruction:

Wherein inet is the local IP address

After logging command input When prompted, enter U buntu under the account password, that can remotely log

If you want to quit remote login, you can enter the following command:

1 $ exit

Sixth, data transmission

It can achieve after completing the SSH service configuration SSH-based data transmission, the most commonly used commands is easy scp, scp command following are commonly used:

$ Scp -r usr @ 43.224. 34.73: / home / lk / root   // remote IP address 43.224.34.73 under usr user's path is / home / lk all the files are copied to the local / root folder $ scp usr @ . 43.224 34.73: /home/lk/test.jar / root // copy under usr user remote IP address 43.224.34.73 path is / home / lk of test.jar files to the local / root folder $ scp -r / root usr @ 43.224. 34.73: / home / lk // under all the files local / root are copied to the remote IP address of 43.224.34.73 usr user path is / home / lk folder $ scp / the root / usr test.jar @ 43.224. 34.73: / home / lk // the local file test.jar / root is copied to the remote user at the IP address 43.224.34.73 path for usr / home / lk folder

scp general instruction format is: scp [parameters] [original path] [target path]

-R parameter which means: recursively copy the entire directory

references:

1, Detailed installation and landed under Ubuntu ssh services (ssh remote login)

2, scp command Detailed