网站用html模拟图片,建设资格注册管理中心网站,html网页设计简单代码,电脑版浏览器网页入口总结 1、ubuntu修改服务器名重启后生效的方法是直接修改/etc/hostname文件
2、ubuntu 22.04操作系统配置ip和dns信息#xff0c;一般只需要使用netplan命令行工具来配置就行#xff0c;在/etc/netplan/在目录下创建一个yaml文件就可以实现ip和dns的配置#xff0c;当然如果…总结 1、ubuntu修改服务器名重启后生效的方法是直接修改/etc/hostname文件
2、ubuntu 22.04操作系统配置ip和dns信息一般只需要使用netplan命令行工具来配置就行在/etc/netplan/在目录下创建一个yaml文件就可以实现ip和dns的配置当然如果/etc/netplan下有多个yaml文件则所有/etc/netplan/*.yaml文件都将被netplan命令行使用参见官方文档https://ubuntu.com/server/docs/network-configuration和https://manpages.ubuntu.com/manpages/jammy/man5/netplan.5.html
3、个人不建议使用/etc/resolve.conf来配置ubuntu 22.04操作系统的dns信息因为太复杂了这个文件是被systemd-resolved服务托管。ubuntu操作系统/etc/resolve.conf中默认使用的是 nameserver 127.0.0.53回环地址,/etc/resolve.conf文中有这么一句话This is /run/systemd/resolve/stub-resolv.conf managed by man:systemd-resolved(8). Do not edit。说明这个文件是被systemd-resolved这个服务托管的。通过 netstat -tnpl| grep systemd-resolved 查看到这个服务是监听在 53 号端口上。为啥要用127.0.0.53作为回环地址而不是127.0.0.1因为127网段都是回环地址(127.0.0.1 - 127.255.255.254),不过通常用大家只喜欢用127.0.0.1来表示而已53表示dns端口 3.1、新安装的ubuntu 22.04环境不做其他改动的情况下/etc/resolv.conf是/run/systemd/resolve/stub-resolv.conf的软链接如果只是手工更改/etc/resolv.conf中的内容重启会后发现/etc/resolv.conf中的内容又恢复成原样了比如注释/etc/resolv.conf文件中的nameserver 127.0.0.53这一行重启系统后被注释掉的nameserver 127.0.0.53这一行又回来了如果不想重启后/etc/resolv.conf中的内容恢复成原样则执行systemctl stop systemd-resolved和systemctl disable systemd-resolved或把/etc/resolv.conf对应的软链接删除再手工建立一个/etc/resolv.conf 3.2、使用/etc/netplan/00-installer-config.yaml配置DNS 172.22.10.66并执行netplan apply使之生效再修改/etc/systemd/resolved.conf内容里的DNS为172.22.136.2然后执行systemctl restart systemd-resolved发现/etc/resolv.conf中的内容没变还是127.0.0.53再执行resolvectl status可以看到/etc/systemd/resolved.conf中的DNS 172.22.136.2存在/etc/netplan/00-installer-config.yaml中的DNS 172.22.10.66也在就是没有/etc/resolv.conf中的127.0.0.53。重启操作系统后/etc/resolv.conf中的内容没变还是127.0.0.53重启操作系统后执行resolvectl status还是只有/etc/systemd/resolved.conf中的DNS 172.22.136.2和/etc/netplan/00-installer-config.yaml中的DNS 172.22.10.66没有/etc/resolv.conf中的127.0.0.53
4、ubuntu官方不建议使用/etc/resolve.conf来配置ubuntu 的dns信息ubuntu对于/etc/resolv.conf的官方描述If you require DNS for your temporary network configuration, you can add DNS server IP addresses in the file /etc/resolv.conf. In general, editing /etc/resolv.conf directly is not recommended, but this is a temporary and non-persistent configuration.
5、ubuntu 22.04查看dns信息的命令是resolvectl status该命令可以看到全局dns信息和某个网卡的dns信息全局DNS服务器信息一般来自配置文件/etc/systemd/resolved.conf,仅在/etc/resolv.conf不是一个指向/run/systemd/resolve/stub-resolv.conf, /usr/lib/systemd/resolv.conf, /run/systemd/resolve/resolv.conf 之一的软连接的情况下且/etc/systemd/resolved.conf中dns被注释掉的情况下全局DNS服务器才会读取自/etc/resolv.conf所以这就是不建议大家使用/etc/resolve.conf来配置ubuntu 的dns信息的原因。
修改服务器名 修改服务器名为FRSBachDEV3重启后也生效的方法 vi /etc/hostname FRSBachDEV3 备注如果/etc/hostname文件中的内容写成hostname FRSBachDEV3那么重启后服务器名就变成了hostnameFRSBachDEV3
修改IP https://ubuntu.com/server/docs/network-configuration https://manpages.ubuntu.com/manpages/jammy/man5/netplan.5.html netplan是一个命令行工具用于ubuntu上配置网络所有/etc/netplan/*.yaml文件都将被使用
rootFRSBachDEV3:~# cat /etc/netplan/00-installer-config.yaml
network:ethernets:ens160:dhcp4: trueversion: 2rootFRSBachDEV3:~# vim /etc/netplan/00-installer-config.yaml
network:ethernets:ens160:dhcp4: falseaddresses: [172.22.136.147/22]routes:- to: defaultvia: 172.22.136.1nameservers:search: [dai.netdai.com,netdai.com]addresses: [172.22.10.66,172.22.10.67]version: 2备注 dhcp4中的4表示ipv4 gateway4中的4表示ipv4不过gateway4已经被废弃配置了gateway4再执行netplan apply的话会报错** (generate:1426): WARNING **: 09:54:13.918: gateway4 has been deprecated, use default routes instead.See the ‘Default routes’ section of the documentation for more details. routes项填写网关地址 addresses项填写ip地址 nameservers项填写dns地址或搜索域其中addresses子项是dns地址列表search子项是搜索域名列表 version: 2这一项表示YAML版本是2curtin,MaaS等目前使用的YAML的版本是1
rootFRSBachDEV3:~# netplan applyrootFRSBachDEV3:~# cat /etc/resolv.conf
nameserver 127.0.0.53
options edns0 trust-ad
search dai.netdai.com netdai.comrootFRSBachDEV3:~# ifconfig
ens160: flags4163UP,BROADCAST,RUNNING,MULTICAST mtu 1500inet 172.22.136.147 netmask 255.255.252.0 broadcast 172.22.139.255inet6 fe80::250:56ff:fe94:522d prefixlen 64 scopeid 0x20linkether 00:50:56:94:52:2d txqueuelen 1000 (Ethernet)RX packets 45071 bytes 3394009 (3.3 MB)RX errors 0 dropped 40 overruns 0 frame 0TX packets 765 bytes 78732 (78.7 KB)TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0lo: flags73UP,LOOPBACK,RUNNING mtu 65536inet 127.0.0.1 netmask 255.0.0.0inet6 ::1 prefixlen 128 scopeid 0x10hostloop txqueuelen 1000 (Local Loopback)RX packets 2331 bytes 168025 (168.0 KB)RX errors 0 dropped 0 overruns 0 frame 0TX packets 2331 bytes 168025 (168.0 KB)TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0查看网关
rootFRSBachDEV3:~# ip route | grep default
default via 172.22.136.1 dev ens160 proto staticrootFRSBachDEV3:~# nmcli dev show|grep GATEWAY
IP4.GATEWAY: 172.22.136.1
IP6.GATEWAY: --
IP4.GATEWAY: --
IP6.GATEWAY: --查看dns
rootFRSBachDEV3:~# resolvectl status
GlobalProtocols: -LLMNR -mDNS -DNSOverTLS DNSSECno/unsupported
resolv.conf mode: stubLink 2 (ens160)Current Scopes: DNSProtocols: DefaultRoute LLMNR -mDNS -DNSOverTLS DNSSECno/unsupported
Current DNS Server: 172.22.10.66DNS Servers: 172.22.10.66 172.22.10.67DNS Domain: dai.netdai.com netdai.com实验如何才会使用到/etc/resolve.conf中的dns信息
/etc/systemd/resolved.conf中dns为172.22.136.2
rootFRSBachDEV3:~# cat /etc/systemd/resolved.conf |grep DNS
DNS172.22.136.2/etc/resolv.conf来自软链接/run/systemd/resolve/stub-resolv.conf
rootFRSBachDEV3:~# ll /etc/resolv.conf
lrwxrwxrwx 1 root root 39 Aug 9 2022 /etc/resolv.conf - ../run/systemd/resolve/stub-resolv.confrootFRSBachDEV3:~# cat /run/systemd/resolve/stub-resolv.conf
nameserver 127.0.0.53
options edns0 trust-ad
search dai.netdai.com netdai.com/run/systemd/resolve/resolv.conf有来自/etc/systemd/resolved.conf中dns 172.22.136.2也有来自/etc/netplan/00-installer-config.yaml中dns 172.22.10.66 172.22.10.67就是没有来自/etc/resolv.conf的127.0.0.53
rootFRSBachDEV3:~# cat /run/systemd/resolve/resolv.conf
nameserver 172.22.136.2
nameserver 172.22.10.66
nameserver 172.22.10.67
search dai.netdai.com netdai.com/etc/systemd/resolved.conf中dns 172.22.136.2和/etc/netplan/00-installer-config.yaml中dns 172.22.10.66 172.22.10.67就是没有来自/etc/resolv.conf的127.0.0.53
rootFRSBachDEV3:~# resolvectl status
GlobalProtocols: -LLMNR -mDNS -DNSOverTLS DNSSECno/unsupportedresolv.conf mode: stub
Current DNS Server: 172.22.136.2DNS Servers: 172.22.136.2Link 2 (ens160)Current Scopes: DNSProtocols: DefaultRoute LLMNR -mDNS -DNSOverTLS DNSSECno/unsupported
Current DNS Server: 172.22.10.66DNS Servers: 172.22.10.66 172.22.10.67DNS Domain: dai.netdai.com netdai.com删除/etc/resolv.conf来自软链接并手工建立/etc/resolv.conf文件其中dns为172.22.136.3
rootFRSBachDEV3:~# ll /etc/resolv.conf
-rw-r--r-- 1 root root 946 Oct 12 10:49 /etc/resolv.confrootFRSBachDEV3:~# cat /etc/resolv.conf
nameserver 172.22.136.3
options edns0 trust-ad
search dai.netdai.com netdai.com保留/etc/systemd/resolved.conf中dns 172.22.136.2的情况下重启systemd-resolved发现还是用的/etc/systemd/resolved.conf中dns 172.22.136.2而没有使用手工建立/etc/resolv.conf文件的dns 172.22.136.3
rootFRSBachDEV3:~# systemctl restart systemd-resolved
rootFRSBachDEV3:~# resolvectl status
GlobalProtocols: -LLMNR -mDNS -DNSOverTLS DNSSECno/unsupported
resolv.conf mode: foreignDNS Servers: 172.22.136.2Link 2 (ens160)
Current Scopes: DNSProtocols: DefaultRoute LLMNR -mDNS -DNSOverTLS DNSSECno/unsupportedDNS Servers: 172.22.10.66 172.22.10.67DNS Domain: dai.netdai.com netdai.com注释掉/etc/systemd/resolved.conf中dns再重启systemd-resolved发现这个时候才真正用上了手工建立/etc/resolv.conf文件的dns 172.22.136.3
rootFRSBachDEV3:~# vim /etc/systemd/resolved.conf
rootFRSBachDEV3:~# cat /etc/systemd/resolved.conf |grep DNS
#DNSrootFRSBachDEV3:~# systemctl restart systemd-resolved
rootFRSBachDEV3:~# resolvectl status
GlobalProtocols: -LLMNR -mDNS -DNSOverTLS DNSSECno/unsupportedresolv.conf mode: foreign
Current DNS Server: 172.22.136.3DNS Servers: 172.22.136.3DNS Domain: dai.netdai.com netdai.comLink 2 (ens160)
Current Scopes: DNSProtocols: DefaultRoute LLMNR -mDNS -DNSOverTLS DNSSECno/unsupportedDNS Servers: 172.22.10.66 172.22.10.67DNS Domain: dai.netdai.com netdai.comrootFRSBachDEV3:~# cat /run/systemd/resolve/resolv.conf
nameserver 172.22.136.3
nameserver 172.22.10.66
nameserver 172.22.10.67
search dai.netdai.com netdai.com
