/etc/hosts -> 작은 dns
여기에 ip등록해두면, 도메인 가능
[root@localhost .ssh]# nmtui
[root@localhost .ssh]# ll /etc/sysconfig/network-scripts
total 232
-rw-r--r--. 1 root root 379 Apr 14 10:06 ifcfg-eth0
-rw-r--r--. 1 root root 254 Sep 12 2016 ifcfg-lo
lrwxrwxrwx. 1 root root 24 Apr 13 10:28 ifdown -> ../../../usr/sbin/ifdown
-rwxr-xr-x. 1 root root 627 Sep 12 2016 ifdown-bnep
-rwxr-xr-x. 1 root root 5817 Sep 12 2016 ifdown-eth
-rwxr-xr-x. 1 root root 6196 May 26 2017 ifdown-ib
-rwxr-xr-x. 1 root root 781 Sep 12 2016 ifdown-ippp
-rwxr-xr-x. 1 root root 4201 Sep 12 2016 ifdown-ipv6
lrwxrwxrwx. 1 root root 11 Apr 13 10:28 ifdown-isdn -> ifdown-ippp
-rwxr-xr-x. 1 root root 1778 Sep 12 2016 ifdown-post
-rwxr-xr-x. 1 root root 1068 Sep 12 2016 ifdown-ppp
-rwxr-xr-x. 1 root root 837 Sep 12 2016 ifdown-routes
-rwxr-xr-x. 1 root root 1444 Sep 12 2016 ifdown-sit
-rwxr-xr-x. 1 root root 1621 Nov 6 2016 ifdown-Team
-rwxr-xr-x. 1 root root 1556 Apr 16 2016 ifdown-TeamPort
-rwxr-xr-x. 1 root root 1462 Sep 12 2016 ifdown-tunnel
lrwxrwxrwx. 1 root root 22 Apr 13 10:28 ifup -> ../../../usr/sbin/ifup
-rwxr-xr-x. 1 root root 12688 Sep 12 2016 ifup-aliases
-rwxr-xr-x. 1 root root 859 Sep 12 2016 ifup-bnep
-rwxr-xr-x. 1 root root 11880 Sep 12 2016 ifup-eth
-rwxr-xr-x. 1 root root 10145 May 26 2017 ifup-ib
-rwxr-xr-x. 1 root root 12039 Sep 12 2016 ifup-ippp
-rwxr-xr-x. 1 root root 10525 Sep 12 2016 ifup-ipv6
lrwxrwxrwx. 1 root root 9 Apr 13 10:28 ifup-isdn -> ifup-ippp
-rwxr-xr-x. 1 root root 642 Sep 12 2016 ifup-plip
-rwxr-xr-x. 1 root root 1043 Sep 12 2016 ifup-plusb
-rwxr-xr-x. 1 root root 2772 Sep 12 2016 ifup-post
-rwxr-xr-x. 1 root root 4154 Sep 12 2016 ifup-ppp
-rwxr-xr-x. 1 root root 1925 Sep 12 2016 ifup-routes
-rwxr-xr-x. 1 root root 3263 Sep 12 2016 ifup-sit
-rwxr-xr-x. 1 root root 1755 Apr 16 2016 ifup-Team
-rwxr-xr-x. 1 root root 1876 Apr 16 2016 ifup-TeamPort
-rwxr-xr-x. 1 root root 2682 Sep 12 2016 ifup-tunnel
-rwxr-xr-x. 1 root root 1740 Sep 12 2016 ifup-wireless
-rwxr-xr-x. 1 root root 4623 Sep 12 2016 init.ipv6-global
-rw-r--r--. 1 root root 15780 Apr 13 2017 network-functions
-rw-r--r--. 1 root root 26829 Sep 12 2016 network-functions-ipv6
[root@localhost .ssh]# cat /etc/sysconfig/network-scripts/ifcfg-eth0
# Generated by dracut initrd
NAME="eth0"
HWADDR=52:54:00:10:51:1B
ONBOOT=yes
NETBOOT=yes
UUID="01239daa-e89f-46aa-88df-f2f828f95805"
IPV6INIT=yes
BOOTPROTO=none
TYPE=Ethernet
IPADDR=192.168.122.101
PREFIX=24
GATEWAY=192.168.122.1
DNS1=192.168.122.1
DEFROUTE=yes
IPV4_FAILURE_FATAL=no
IPV6_AUTOCONF=yes
IPV6_DEFROUTE=yes
IPV6_PEERDNS=yes
IPV6_PEERROUTES=yes
IPV6_FAILURE_FATAL=no
[root@localhost .ssh]# ifconfig eth0
eth0: flags=4163<UP,BROADCAST,RUNNING,MULTICAST> mtu 1500
inet 192.168.122.253 netmask 255.255.255.0 broadcast 192.168.122.255
inet6 fe80::5054:ff:fe10:511b prefixlen 64 scopeid 0x20<link>
ether 52:54:00:10:51:1b txqueuelen 1000 (Ethernet)
RX packets 497468 bytes 951679576 (907.5 MiB)
RX errors 0 dropped 5 overruns 0 frame 0
TX packets 447364 bytes 30790677 (29.3 MiB)
TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0
[root@localhost .ssh]# nmtui
[root@localhost .ssh]#
[root@localhost .ssh]# ifconfig eth0
eth0: flags=4163<UP,BROADCAST,RUNNING,MULTICAST> mtu 1500
inet 192.168.122.253 netmask 255.255.255.0 broadcast 192.168.122.255
inet6 fe80::5054:ff:fe10:511b prefixlen 64 scopeid 0x20<link>
ether 52:54:00:10:51:1b txqueuelen 1000 (Ethernet)
RX packets 497513 bytes 951681944 (907.5 MiB)
RX errors 0 dropped 5 overruns 0 frame 0
TX packets 447366 bytes 30790809 (29.3 MiB)
TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0
[root@localhost .ssh]# ping -c 2 localhost
PING localhost (127.0.0.1) 56(84) bytes of data.
64 bytes from localhost (127.0.0.1): icmp_seq=1 ttl=64 time=0.060 ms
64 bytes from localhost (127.0.0.1): icmp_seq=2 ttl=64 time=0.058 ms
--- localhost ping statistics ---
2 packets transmitted, 2 received, 0% packet loss, time 999ms
rtt min/avg/max/mdev = 0.058/0.059/0.060/0.001 ms
[root@localhost .ssh]# ping -c 2 192.168.122.1
PING 192.168.122.1 (192.168.122.1) 56(84) bytes of data.
64 bytes from 192.168.122.1: icmp_seq=1 ttl=64 time=0.240 ms
64 bytes from 192.168.122.1: icmp_seq=2 ttl=64 time=0.218 ms
--- 192.168.122.1 ping statistics ---
2 packets transmitted, 2 received, 0% packet loss, time 1000ms
rtt min/avg/max/mdev = 0.218/0.229/0.240/0.011 ms
[root@localhost .ssh]# ping -c 2 8.8.8.8
PING 8.8.8.8 (8.8.8.8) 56(84) bytes of data.
64 bytes from 8.8.8.8: icmp_seq=1 ttl=111 time=27.3 ms
64 bytes from 8.8.8.8: icmp_seq=2 ttl=111 time=27.3 ms
--- 8.8.8.8 ping statistics ---
2 packets transmitted, 2 received, 0% packet loss, time 1001ms
rtt min/avg/max/mdev = 27.339/27.361/27.383/0.022 ms
[root@localhost .ssh]# ping -c 2 www.google.co.kr
PING www.google.co.kr (172.217.161.227) 56(84) bytes of data.
64 bytes from kix06s05-in-f3.1e100.net (172.217.161.227): icmp_seq=1 ttl=111 time=27.5 ms
64 bytes from kix06s05-in-f3.1e100.net (172.217.161.227): icmp_seq=2 ttl=111 time=27.4 ms
--- www.google.co.kr ping statistics ---
2 packets transmitted, 2 received, 0% packet loss, time 1001ms
rtt min/avg/max/mdev = 27.489/27.535/27.581/0.046 ms
[root@localhost .ssh]# ping -c 2 192.168.122.101
PING 192.168.122.101 (192.168.122.101) 56(84) bytes of data.
From 192.168.122.253 icmp_seq=1 Destination Host Unreachable
From 192.168.122.253 icmp_seq=2 Destination Host Unreachable
--- 192.168.122.101 ping statistics ---
2 packets transmitted, 0 received, +2 errors, 100% packet loss, time 999ms
pipe 2
[root@localhost .ssh]# traceroute www.google.co.kr
traceroute to www.google.co.kr (142.250.206.227), 30 hops max, 60 byte packets
1 gateway (192.168.122.1) 0.164 ms 0.112 ms 0.067 ms
2 59.29.225.254 (59.29.225.254) 0.883 ms 0.822 ms 0.740 ms
3 59.29.225.12 (59.29.225.12) 0.670 ms 0.616 ms 0.548 ms
4 211.192.200.241 (211.192.200.241) 3.810 ms 3.760 ms 3.758 ms
5 * * *
6 * * *
7 112.189.14.85 (112.189.14.85) 1.261 ms 112.189.13.97 (112.189.13.97) 1.359 ms 1.266 ms
8 * * *
9 112.174.90.154 (112.174.90.154) 8.385 ms 112.174.90.130 (112.174.90.130) 7.804 ms 7.793 ms
10 112.174.84.50 (112.174.84.50) 7.773 ms 112.174.84.46 (112.174.84.46) 7.957 ms 112.174.84.50 (112.174.84.50) 7.084 ms
11 142.250.165.78 (142.250.165.78) 27.844 ms 72.14.243.228 (72.14.243.228) 33.514 ms 142.250.165.78 (142.250.165.78) 28.548 ms
12 108.170.243.33 (108.170.243.33) 31.512 ms 29.781 ms *
13 108.170.242.193 (108.170.242.193) 32.138 ms 142.250.58.187 (142.250.58.187) 28.048 ms 172.253.75.94 (172.253.75.94) 32.654 ms
14 108.170.242.208 (108.170.242.208) 32.408 ms 108.170.242.112 (108.170.242.112) 33.541 ms 108.170.242.98 (108.170.242.98) 31.794 ms
15 142.251.254.135 (142.251.254.135) 33.588 ms 209.85.249.18 (209.85.249.18) 33.788 ms 142.251.254.81 (142.251.254.81) 33.138 ms
16 142.250.57.228 (142.250.57.228) 33.823 ms kix06s10-in-f3.1e100.net (142.250.206.227) 28.590 ms 142.250.58.92 (142.250.58.92) 34.561 ms
[root@localhost .ssh]# nslookup www.naver.com
Server: 192.168.122.1
Address: 192.168.122.1#53
Non-authoritative answer:
www.naver.com canonical name = www.naver.com.nheos.com.
Name: www.naver.com.nheos.com
Address: 223.130.200.107
Name: www.naver.com.nheos.com
Address: 223.130.200.104
[root@localhost .ssh]# dig www.daum.net
; <<>> DiG 9.9.4-RedHat-9.9.4-38.el7_3.3 <<>> www.daum.net
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 12430
;; flags: qr rd ra; QUERY: 1, ANSWER: 2, AUTHORITY: 0, ADDITIONAL: 1
;; OPT PSEUDOSECTION:
; EDNS: version: 0, flags:; udp: 1232
;; QUESTION SECTION:
;www.daum.net. IN A
;; ANSWER SECTION:
www.daum.net. 273 IN CNAME daum-4vdtymgd.kgslb.com.
daum-4vdtymgd.kgslb.com. 12 IN A 121.53.105.193
;; Query time: 2 msec
;; SERVER: 192.168.122.1#53(192.168.122.1)
;; WHEN: Fri Apr 14 10:20:12 KST 2023
;; MSG SIZE rcvd: 94
[root@localhost .ssh]# nmcli
virbr0: connected to virbr0
bridge, 52:54:00:7E:B9:D6, sw, mtu 1500
inet4 192.168.124.1/24
eth0: connected to eth0
"Red Hat Virtio network device"
ethernet (virtio_net), 52:54:00:10:51:1B, hw, mtu 1500
ip4 default
inet4 192.168.122.253/24
inet6 fe80::5054:ff:fe10:511b/64
lo: unmanaged
loopback (unknown), 00:00:00:00:00:00, sw, mtu 65536
virbr0-nic: unmanaged
tun, 52:54:00:7E:B9:D6, sw, mtu 1500
Use "nmcli device show" to get complete information about known devices and
"nmcli connection show" to get an overview on active connection profiles.
Consult nmcli(1) and nmcli-examples(5) manual pages for complete usage details.
[root@localhost .ssh]# nmcli dev
DEVICE TYPE STATE CONNECTION
virbr0 bridge connected virbr0
eth0 ethernet connected eth0
lo loopback unmanaged --
virbr0-nic tun unmanaged --
[root@localhost .ssh]# nmcli connection
NAME UUID TYPE DEVICE
eth0 01239daa-e89f-46aa-88df-f2f828f95805 802-3-ethernet eth0
virbr0 ca54eaeb-de63-4d54-8fa3-631446f13343 bridge virbr0
[root@localhost .ssh]# nmcli con
add delete edit help load monitor show
clone down export import modify reload up
[root@localhost .ssh]# nmcli con del
Error: No connection specified.
[root@localhost .ssh]# nmcli con del eth0
Connection 'eth0' (01239daa-e89f-46aa-88df-f2f828f95805) successfully deleted.
[root@localhost .ssh]# ls /etc/sysconfig/network-scripts
ifcfg-lo ifdown-ipv6 ifdown-Team ifup-eth ifup-plusb ifup-TeamPort
ifdown ifdown-isdn ifdown-TeamPort ifup-ib ifup-post ifup-tunnel
ifdown-bnep ifdown-post ifdown-tunnel ifup-ippp ifup-ppp ifup-wireless
ifdown-eth ifdown-ppp ifup ifup-ipv6 ifup-routes init.ipv6-global
ifdown-ib ifdown-routes ifup-aliases ifup-isdn ifup-sit network-functions
ifdown-ippp ifdown-sit ifup-bnep ifup-plip ifup-Team network-functions-ipv6
[root@localhost .ssh]# nmcli con del 'Wired connection 1'
Connection 'Wired connection 1' (8966818d-f806-33f7-9e73-b0b7800dae91) successfully deleted.
[root@localhost .ssh]# nmcli dev
DEVICE TYPE STATE CONNECTION
virbr0 bridge connected virbr0
eth0 ethernet disconnected --
lo loopback unmanaged --
virbr0-nic tun unmanaged --
[root@localhost .ssh]# nmcli con add type
adsl bridge generic macvlan team vpn
bluetooth bridge-slave gsm no-slave team-slave vxlan
bond cdma infiniband olpc-mesh tun wifi
bond-slave ethernet ip-tunnel pppoe vlan wimax
[root@localhost .ssh]# nmcli con add type ethernet
Display all 141 possibilities? (y or n)
802-1x.altsubject-matches dcb.app-fcoe-priority
802-1x.anonymous-identity dcb.app-fip-flags
802-1x.ca-cert dcb.app-fip-priority
802-1x.ca-path dcb.app-iscsi-flags
802-1x.client-cert dcb.app-iscsi-priority
802-1x.domain-suffix-match dcb.priority-bandwidth
802-1x.eap dcb.priority-flow-control
802-1x.identity dcb.priority-flow-control-flags
802-1x.pac-file dcb.priority-group-bandwidth
802-1x.password dcb.priority-group-flags
802-1x.password-flags dcb.priority-group-id
802-1x.password-raw dcb.priority-strict-bandwidth
802-1x.password-raw-flags dcb.priority-traffic-class
802-1x.phase1-fast-provisioning ethernet.auto-negotiate
802-1x.phase1-peaplabel ethernet.cloned-mac-address
802-1x.phase1-peapver ethernet.duplex
802-1x.phase2-altsubject-matches ethernet.generate-mac-address-mask
802-1x.phase2-auth ethernet.mac-address
802-1x.phase2-autheap ethernet.mac-address-blacklist
802-1x.phase2-ca-cert ethernet.mtu
802-1x.phase2-ca-path ethernet.port
802-1x.phase2-client-cert ethernet.s390-nettype
802-1x.phase2-domain-suffix-match ethernet.s390-options
802-1x.phase2-private-key ethernet.s390-subchannels
802-1x.phase2-private-key-password ethernet.speed
802-1x.phase2-private-key-password-flags ethernet.wake-on-lan
802-1x.phase2-subject-match ethernet.wake-on-lan-password
802-1x.pin ifname
802-1x.pin-flags ipv4.addresses
802-1x.private-key ipv4.dad-timeout
802-1x.private-key-password ipv4.dhcp-client-id
802-1x.private-key-password-flags ipv4.dhcp-fqdn
802-1x.subject-match ipv4.dhcp-hostname
[root@localhost .ssh]# nmcli con add type ethernet ifname
eth0 lo virbr0 virbr0-nic
[root@localhost .ssh]# nmcli con add type ethernet ifname eth0 con-name eth0 autoconnect yes ipv4.
ipv4.addresses ipv4.dhcp-send-hostname ipv4.dns-search ipv4.method
ipv4.dad-timeout ipv4.dhcp-timeout ipv4.gateway ipv4.never-default
ipv4.dhcp-client-id ipv4.dns ipv4.ignore-auto-dns ipv4.route-metric
ipv4.dhcp-fqdn ipv4.dns-options ipv4.ignore-auto-routes ipv4.routes
ipv4.dhcp-hostname ipv4.dns-priority ipv4.may-fail
[root@localhost .ssh]# nmcli con add type ethernet ifname eth0 con-name eth0 autoconnect yes
Connection 'eth0' (6a23644f-89a1-438c-b834-90849d9f3977) successfully added.
[root@localhost .ssh]# ls /etc/sysconfig/network-scripts/
ifcfg-eth0 ifdown-ippp ifdown-sit ifup-bnep ifup-plip ifup-Team network-functions-ipv6
ifcfg-lo ifdown-ipv6 ifdown-Team ifup-eth ifup-plusb ifup-TeamPort
ifdown ifdown-isdn ifdown-TeamPort ifup-ib ifup-post ifup-tunnel
ifdown-bnep ifdown-post ifdown-tunnel ifup-ippp ifup-ppp ifup-wireless
ifdown-eth ifdown-ppp ifup ifup-ipv6 ifup-routes init.ipv6-global
ifdown-ib ifdown-routes ifup-aliases ifup-isdn ifup-sit network-functions
[root@localhost .ssh]# nmcli con modi eth0 ipv4.method manual ipv4.addresses 192.168.122.108/24 ipv4.dns 192.168.122.1 ipv4.gateway 192.168.122.1
[root@localhost .ssh]# systemctl restart network
[root@localhost .ssh]# ifconfig eth0
eth0: flags=4163<UP,BROADCAST,RUNNING,MULTICAST> mtu 1500
inet 192.168.122.108 netmask 255.255.255.0 broadcast 192.168.122.255
inet6 fe80::6f2c:1f29:25e8:7d1f prefixlen 64 scopeid 0x20<link>
ether 52:54:00:10:51:1b txqueuelen 1000 (Ethernet)
RX packets 499027 bytes 951768885 (907.6 MiB)
RX errors 0 dropped 5 overruns 0 frame 0
TX packets 447620 bytes 30817357 (29.3 MiB)
TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0
[root@localhost .ssh]# cat /etc/resolv.conf
# Generated by NetworkManager
nameserver 192.168.122.1
study log