os

Ubuntu Notes

Ubuntu Notes

[TOC]

Command

查看软链接实际指向的文件位置

$ ls -l <filename>

ssh-keygen

  1. 在master生成秘钥, id_rsa, id_rsa.pub或id_dsa, id_dsa.pub：
    ```bash
    $ ssh-keygen -t [rsa|dsa]

$ ls ~/.ssh
id_rsa id_rsa.pub known_hosts

$ cat id_rsa
—–BEGIN OPENSSH PRIVATE KEY—–
b3BlbnNzaC1rZXktdjEAAAAABG5vbmUAAAAEbm9uZQAAAAAAAAABAAABFwAAAAdzc2gtcn
……
……
……
iXQVQHy5W5hX8kykh9PfVeh745kzWDQqcp9JOBlaWcRxY+g7A5xfYaEeTQqjd/ZX8692UP
I/EFmILN9N26WIE3AAAAD2Z3ekBmd3otbWJwLmxhbgECAw==
—–END OPENSSH PRIVATE KEY—–

$ cat id_rsa.pub
ssh-rsa AAAAB3NzaC1yc2EAAAADAQABAAABAQCpQZCHx6E5sj3/AZec3nFBjnWi83g/9brGVuiAV8yv+q/PksiGmZ5XGoGStq6iG9DWVLJa1Tv26Kh8Evi9rvpSbGaPbPPA09Gzi+UNZMieydSeqpFIDanB0X9H8VfGEcOzIw21wOVtIYthu5cwyjdfO3zYAV/scJcQon4m/bttk3cAPmnaQXw2QVg/gFWVdSadgRC1MaQJcG5zJxEdVKSHYyk6gCVKZLYyc029iZndbNfqtKcsV+vkuSCwY/nD/5B+GqnXjPSgVL9I7QIC8Gf9k+C012hBF3Vir5p1edft2Fn+CN77WcOyj9ye/ZSLvNDgW5W/0Ab27klWe/pI1eBT fwz@fwz-mbp.lan

2. 把master生成的公钥发送到slave

$ ssh-copy-id -i ~/.ssh/id_rsa.pub username@ip_address

此时，在slave上生成authorized_keys文件，内容为id_rsa.pub中的内容。

3. 从master通过ssh登录到slave，免密成功。