Password scp ssh is not required for Linux

Scp ssh is not required for Linux. 1. To use scp without a password, ssh is another key pair verification method. 1. Use the ssh-keygen command to generate a key. In addition to the password, select the default value: Press enter. If you do not need a password, press enter directly when you enter the password. If the key is set to null, the ssh or scp key is used by default because the key is empty, so ssh www.2cto.com [root @ xxx root] # ssh-keygen-t rsa Generating public/private rsa key pair. enter file in which to save the key (/root /. ssh/id_rsa): Created directory '/root /. ssh '. enter passphrase (empty for no passphrase): Enter same passphrase again: Your identification has been saved in/root /. ssh/id_rsa. your public key has been saved in/ro Ot /. ssh/id_rsa.pub. the key fingerprint is: e0: f0: 3b: d3: 0a: 3d: da: 42: 01: 6a: 61: 2f: 6c: a0: c6: e7 root @ xxx [root @ xxx root] #2. Change the public key access attribute in this key pair to 755 and copy it to the backup machine, and changed it to authorized_keys [root @ xxx root] # chmod 755/root /. ssh/id_rsa.pub [root @ xxx root] # scp/root /. ssh/id_rsa.pub 192.168.1.92:/root /. ssh/authorized_keys root @ xxx's password: id_rsa.pub 100% 218 3.2 MB/s [root @ xxx root] # Use ssh scp sftp to access the server. You do not need to enter a password for the machine. In this way, you can use shell for automatic file transfer.