1. 配置IP.網關.DNS連接互聯網

vim /etc/NetworkManager/system-connections/ens33.nmconnection   ###網絡配置文件

[connection]
id=ens33
uuid=3c17691d-cccc-xxxx-zzzz-xzxzxczxcczx
type=ethernet
autoconnect-priority=-999
interface-name=ens33
timestamp=1732001143

[ethernet]

[ipv4]
address1=192.168.27.19/24,192.168.27.254   ### IP/網關
dns=192.168.27.1;114.114.114.114;223.5.5.5;8.8.8.8  ###dns配置,多dns;分隔
method=manual

[ipv6]
addr-gen-mode=eui64
method=auto

[proxy]

完成后重新加載和重啟網卡
nmcli c reload & nmcli c up ens33

2. 設置root登錄

vim /etc/ssh/sshd_configcat /etc/ssh/sshd_config  ### ssh配置文件未變
添加內容
PermitRootLogin yes

完成后重啟sshd服務
systemctl restart sshd

3. 修改國內源

cd /etc/yum.repos.d/ && cp centos.repo centos.repo.bak  ### 路徑未變，保存源repo文件后，修改centos.repo

### 阿里源示例
vim centos.repo

[baseos]
name=CentOS Stream $releasever - BaseOS
#metalink=https://mirrors.centos.org/metalink?repo=centos-baseos-$stream&arch=$basearch&protocol=https,http
baseurl=https://mirrors.aliyun.com/centos-stream/9-stream/BaseOS/$basearch/os/
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-centosofficial
gpgcheck=1
repo_gpgcheck=0
metadata_expire=6h
countme=1
enabled=1
##########
##########
[appstream]
name=CentOS Stream $releasever - AppStream
# metalink=https://mirrors.centos.org/metalink?repo=centos-appstream-$stream&arch=$basearch&protocol=https,http
baseurl=https://mirrors.aliyun.com/centos-stream/9-stream/AppStream/$basearch/os/
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-centosofficial
gpgcheck=1
repo_gpgcheck=0
metadata_expire=6h
countme=1
enabled=1

完成后清理緩存并加載新源
dnf clean all && dnf makecache