How to use SFTP command to access SFTP server on the development board

One 、 background

      1、 The specified user can only pass sftp Visit upload and download files , Cannot pass SSH land , And lock it in a specific directory , The development board does not sftp, Here's the picture 1.

                                                                 chart 1

Two 、 Libraries to download (openssl,openssh)

2.1、 Download path （github Download from the official website ）

2.2、 The following is the library file sharing I downloaded https://share.weiyun.com/UOPUjHgo 3、 ... and 、Ubuntu Cross compilation

 3.1、 New installation directory    

mkdir  test_sftp

cd test_sftp

mkdir source package

mkdir package/openssl

cd source

3.2、 Put the downloaded installation package under this path and unzip

tar -zxvf openssl-3.0.0.tar.gz

tar -zxvf openssh-8.4p1.tar.gz

3.3、openssl compile

cd openssl-3.0.0

./Configure --prefix=/home/gec/Downloads/test_tsftp/package/openssl  (--prefix Specify installation path )

source /opt/fsl-framebuffer/2.4.4/environment-setup-cortexa9hf-neon-fsl-linux-gnueabi ( Declare the cross compiler ), My development board specifies the cross compiler as arm-fsl-linux-gnueabi-gcc. The installation path is /opt/fsl-framebuffer/2.4.4/environment-setup-cortexa9hf-neon-fsl-linux-gnueabi

make

make install

3.4、make Possible errors in post compilation , Cross compiler path error ,-m64 error ( Pictured 2), chart 3 Is the modified Makefile

                                                                chart 2

                                                                chart 3

  After successful installation package/openssl/ Relevant library files are generated under the directory

 3.4、openssh Cross compilation

cd /openssh-8.4p1

./configure --host=arm-fsl-linux-gnueabi --with-ssl-dir=/home/gec/Downloads/test_stftp/package/openssl --disable-etc-default-login

(--host Specify the cross compiler ,--with-ssl-dir= Point to openssl Correlation Library )

make

make You can find it after success sftp,sftp-server Migrate to development board /bin Under the table of contents ,libcrypto.so.3 Put it in /lib Under the table of contents , Permission set to 777,

Input at the terminal of the development board sftp, The following figure shows the successful migration

  If connected sftp The server reports the following error , hold ssh Download to /usr/local/bin/ Under the table of contents , permissions 777.

Log in again sftp Server success

End ！