How to use SSH and SFTP protocols at home

adopt SSH and SFTP agreement , We have access to other devices , Efficient and secure transfer of files, etc .

A few years ago , I decided to configure another computer , So that I can access it at work to transfer the files I need . Do that , The most basic step is to ask your network provider （ISP） Provide a fixed address .

There is an unnecessary but important step , Is to ensure that your accessible system is secure . In my case , I plan to visit it only in the workplace , So I can limit the access IP Address . Even so , You still have to take as many safety measures as possible . Once you set up this system , People all over the world will soon be able to try to access your system . This is very surprising and frightening . You can find this through the log file . I speculate that there are detection robots doing their best to search for systems without safety measures .

Soon after I set up the system , I don't think this kind of interview is of great use , So , I shut it down so that I don't worry about it anymore . For all that , As long as it is erected , Use... In your home network SSH and SFTP It's still a little useful .

Of course , There is a prerequisite , This other computer must have been turned on , It doesn't matter whether the computer is logged in or not . You also need to know its IP Address . There are two ways to know , One is to access your router through a browser , In general, your address format is similar to 192.168.1.254 such . Through some search , It is easy to find out that the current is on and connected to eth0 perhaps wifi System on . How to identify the computer you are looking for may be a challenge .

The easier way to find this computer is , open shell, Input ：

1. ifconfig

The command will output some information , The information you need is inet Back , Looks like 192.168.1.234 similar . When you find this , Go back to the client computer you want to access this host , Enter... On the command line ：

1. ssh [email protected]

If you want the above command to execute normally ,gregp It must be the correct user name in the host system . You will be asked for their password . If the password and user name you typed are correct , You will pass shell The environment is connected to this computer . I'm honest , about SSH I don't use it often . I use it occasionally , I can run dnf To update other computers than those I often use . Usually , I use SFTP ：

1. sftp [email protected]

I need a simple way to transfer a file to another computer . Compared with flash sticks and additional devices , It's more convenient , It takes less time .

Once the connection is established ,SFTP There are two basic commands ,get, Receive files from the host ;put, Send files to the host . Before connecting , I often move to the folder I want to receive or transmit on the client . After connecting , You will be in a top-level directory , such as home/gregp. Once the connection is successful , You can use it as if it were on the client cd, Change your working path on the host . You may need to use ls To confirm your position .

If you want to change the working directory of your client . use lcd command （ namely local change directory It means ）. alike , use lls To display the contents of the client working directory .

If the directory name you want is not available on the host , What are you gonna do? ？ use mkdir Create a new directory on the host . Or you can copy all the files in the entire directory to the host ：

1. put -r thisDir/

This will create the directory on the host and copy all its files and subdirectories to the host . This transmission is very fast , Can reach the upper limit of hardware . It's not like encountering network bottlenecks like Internet transmission . To see what you can do in SFTP A list of commands that can be used in a session ：

1. mansftp

I can also do it on my computer Windows Virtual machine internal use SFTP, This is another advantage of configuring a virtual machine instead of a dual system . This allows me to be in the system Linux Partially move in or out of the file . And I just need to be Windows Just use a client in .

You can use SSH or SFTP Access through network cable or WIFI Any device connected to your router . here , I used one called SSHDroid Application , Able to operate in passive mode SSH. In other words , You can use your computer to access Android equipment . Recently, I found another application ,Admin Hands, Whether your client is a tablet or a mobile phone , Can use SSH perhaps SFTP operation . This app is great for backing up and sharing photos on your phone .

via: https://opensource.com/article/18/10/ssh-sftp-home-network

author ：Geg Pittman Topic selection ：lujun9972 translator ：singledo proofreading ：wxy

This paper is written by LCTT Original compilation ,Linux China Honor roll out