Raspberry Pi ssh error: WARNING: remote host identification has changed resolved

When Raspberry Pi is used for the first time, the local Nic of Raspberry Pi is allocated to 192.168.0.103 by the DHCP server. The connection is normal. As a result, I was very happy to insert the wireless network card into Raspberry Pi, eager to get rid of the limitations of the network cable. Ifconfig: Obtain the MAC address of the wireless network card, and then obtain the allocated IP address-192.168.0.104 on the route side. In the same way as SSH, the following error is reported: GOOGLE may have been caused by the 104 address used in SSH, but the query method is as follows: ssh-o 'stricthostkeychecking no' user @ host and modify the StrictHostKeyChecking no configuration in the/etc/ssh/ssh_config file, which seems to be invalid and urgent. Suddenly another solution came into view. The local machine directly typed the ssh-keygen-R hostname and re-generated the key: A trembling heart, it is estimated that it can become. It turned out to be perfect. The only question was that/home/Tonix/could not be found in WINDOWS /. the ssh/known_hosts.old file cannot be found in Raspberry Pi's Linux system. Do you know where the file is?