You don't need to enter a password to copy files with scp under Linux

This article mainly explains "how to use scp to copy files under Linux without entering a password", interested friends may wish to have a look. The method introduced in this paper is simple, fast and practical. Let's let the editor take you to learn how to copy files with scp under Linux without entering a password.

When two LINUX hosts want to transfer files to each other, you can use the SCP command to achieve this, and do not enter a password after establishing a trust relationship. Copy the ssh public key file of your local host user to the ~ / .ssh/authorized_keys file of the remote host user assuming that the local host linux100 and the remote host linux200

First, the users in the linux100 host

Running

# ssh-keygen-t rsa

The results are as follows

QUOTE:

Generating public/private rsa key pair.

Enter file in which to save the key (/ home/.username/ssh/id_rsa): # enter

Enter passphrase (empty for no passphrase): # enter

Enter same passphrase again:# enter

Your identification has been saved in / home/.username /. Ssh/id_rsa.

Your public key has been saved in / home/.username /. Ssh/id_rsa.pub.

The key fingerprint is:

38:25:c1:4d:5d:d3:89:bb:46:67:bf:52:af:c3:17:0c username@localhost

Generating RSA keys:

Key generation complete.

Two files will be generated in the user directory ~ / .ssh /, id_rsa,id_rsa.pub

Second, copy the id_rsa.pub file on the linux100 host to the .ssh directory under the root user home directory of the linux200 host, and rename it to authorized_keys

That is:

/ root/.ssh/authorized_keys

In this way, using the scp command on the linux100 host to copy the file to the linux200 will not prompt for a password, but will be copied directly. You can also use the scp command on the linux100 host to copy the files on linux200 to the local machine; in short, you can access linux200 on linux100 without verification

And vice versa!

Note: if you have multiple computers that need to copy with linux200, you only need to copy the contents of id_rsa.pub to the authorized_keys file. (not verified on ssh, linux200 can only work with one server without authentication)

Third, copy the file or directory command:

Copy the file:

(1) copy local files to remote

Scp file name user name @ computer IP or computer name: remote path

(2) copy files back to the local area remotely

Scp user name @ computer IP or computer name: file name local path

Copy the directory:

(1) copy the local directory to the remote

Scp-r directory name-user name @ computer IP or computer name: remote path

(2) copy the directory back to the local area remotely

Scp-r user name @ computer IP or computer name: directory name local path

[@ more@]

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