Oracle 给每个 ACE 一个福利，就是在 Oracle Cloud 上有 6500刀的消费券，可以直接在上面来买云主机用，正好弄了几个做测试机器。http://www.cndba.cn/dave/article/131698

但是发现实例修改主机名后，会有自动还原回来：

[root@instance-20250723-2205 ~]# hostnamectl set-hostname davehttp://www.cndba.cn/dave/article/131698http://www.cndba.cn/dave/article/131698

http://www.cndba.cn/dave/article/131698

这里修改 OCI 的Hostname 配置文件http://www.cndba.cn/dave/article/131698

vi /etc/oci-hostname.conf

http://www.cndba.cn/dave/article/131698

将其中的 PRESERVE_HOSTINFO=0 修改为 PRESERVE_HOSTINFO=1http://www.cndba.cn/dave/article/131698

[root@dave ~]# cat /etc/oci-hostname.conf 
# This configuration file controls the hostname persistence behavior for Oracle Linux
# compute instance on Oracle Cloud Infrastructure (formerly Baremetal Cloud Services)
# Set PRESERVE_HOSTINFO to one of the following values
#   0 -- default behavior to update hostname, /etc/hosts and /etc/resolv.conf to 
#        reflect the hostname set during instance creation from the metadata service
#   1 -- preserve user configured hostname across reboots; update /etc/hosts and 
#           /etc/resolv.conf from the metadata service  
#   2 -- preserve user configured hostname across instance reboots; no custom  
#        changes to /etc/hosts and /etc/resolv.conf from the metadata service,
#        but dhclient will still overwrite /etc/resolv.conf
#   3 -- preserve hostname and /etc/hosts entries across instance reboots; 
#        update /etc/resolv.conf from instance metadata service
PRESERVE_HOSTINFO=1

[root@dave ~]#

然后在修改就不会变了。

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