[root@VM-12-13-centos step]# cd ~ [root@VM-12-13-centos ~]# pwd /root [root@VM-12-13-centos ~]# ssh-keygen -t rsa -C "[email protected]" Generating public/private rsa key pair. Enter file in which to save the key (/root/.ssh/id_rsa): 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 /root/.ssh/id_rsa.pub. The key fingerprint is: SHA256:4zi9IBcTt55k25V27rGGGzdCGOb3LmGnspXtWoigq/c 15150590000@163.com The key's randomart image is: +---[RSA 3072]----+ | | | | | . . o | | o + o . | | o S o * . | | @ * *oB. | | . * * o.*=B | | o.+ ...+Oo. | | .o..E .oo==o | +----[SHA256]-----+ [root@VM-12-13-centos ~]# ll total 8 drwxr-xr-x 3 root root 4096 Jun 8 09:32 logs drwxr-xr-x 3 root root 4096 Jun 8 09:32 nacos [root@VM-12-13-centos ~]# ls -a . .. .bash_history .bash_logout .bash_profile .bashrc .cache .config .cshrc .gitconfig logs nacos .npm .npmrc .oracle_jre_usage .pip .pydistutils.cfg .ssh .tcshrc .viminfo .wget-hsts [root@VM-12-13-centos ~]# cd .ssh/ [root@VM-12-13-centos .ssh]# ll total 12 -rw------- 1 root root 2602 Jun 8 16:02 id_rsa -rw-r--r-- 1 root root 573 Jun 8 16:02 id_rsa.pub -rw-r--r-- 1 root root 185 Jun 8 15:47 known_hosts [root@VM-12-13-centos .ssh]#