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ip addr 查看IP
ifconfig
ip -s link show ens33 查看网卡流量
ip route 查看路由
route -n
ping -c 3 192.168.1.1
tracepath 8.8.8.8 –n
traceroute 8.8.8.8
ss –lnt 查看本地监听的TCP端口
[root@sky ~]# ss -lnt State Recv-Q Send-Q Local Address:Port Peer Address:Port LISTEN 0 100 127.0.0.1:25 *:* LISTEN 0 128 *:60927 *:* LISTEN 0 128 *:111 *:* LISTEN 0 128 *:22 *:* LISTEN 0 128 127.0.0.1:631 *:* LISTEN 0 100 ::1:25 :::* LISTEN 0 128 :::39912 :::* LISTEN 0 128 :::111 :::* LISTEN 0 128 :::80 :::* LISTEN 0 128 :::22 :::* LISTEN 0 128 ::1:631 :::* LISTEN 0 128 :::23 :::* [root@sky ~]# netstat -anpt Active Internet connections (servers and established) Proto Recv-Q Send-Q Local Address Foreign Address State PID/Program name tcp 0 0 127.0.0.1:25 0.0.0.0:* LISTEN 2127/master tcp 0 0 0.0.0.0:60927 0.0.0.0:* LISTEN 1637/rpc.statd tcp 0 0 0.0.0.0:111 0.0.0.0:* LISTEN 1295/rpcbind tcp 0 0 0.0.0.0:22 0.0.0.0:* LISTEN 1108/sshd tcp 0 0 127.0.0.1:631 0.0.0.0:* LISTEN 2646/cupsd tcp6 0 0 ::1:25 :::* LISTEN 2127/master tcp6 0 0 :::39912 :::* LISTEN 1637/rpc.statd tcp6 0 0 :::111 :::* LISTEN 1295/rpcbind tcp6 0 0 :::80 :::* LISTEN 5006/httpd tcp6 0 0 :::22 :::* LISTEN 1108/sshd tcp6 0 0 ::1:631 :::* LISTEN 2646/cupsd tcp6 0 0 :::23 :::* LISTEN 1/systemd tcp6 0 157 192.168.1.128:23 192.168.1.101:51008 ESTABLISHED 1/systemd
nmcli配置网络 （nmcli和networkmanager配置网络）
显示所有连接
[root@sky ~]# nmcli connection show 名称 UUID 类型 设备 eth0 8071cc7b-d407-4dea-a41e-16f7d2e75ee9 802-3-ethernet ens33
nmcli connection show eth0 查看网络设备信息
[root@sky ~]# nmcli connection show eth0 connection.id: eth0 connection.uuid: 8071cc7b-d407-4dea-a41e-16f7d2e75ee9 connection.interface-name: -- connection.type: 802-3-ethernet connection.autoconnect: yes connection.timestamp: 1448718817 connection.read-only: no connection.permissions: connection.zone: -- connection.master: -- connection.slave-type: -- connection.secondaries: connection.gateway-ping-timeout: 0 802-3-ethernet.port: -- 802-3-ethernet.speed: 0 802-3-ethernet.duplex: -- 802-3-ethernet.auto-negotiate: yes 802-3-ethernet.mac-address: 00:0C:29:25:CD:BF 802-3-ethernet.cloned-mac-address: -- 802-3-ethernet.mac-address-blacklist: 802-3-ethernet.mtu: 自动 802-3-ethernet.s390-subchannels: 802-3-ethernet.s390-nettype: -- 802-3-ethernet.s390-options: ipv4.method: manual ipv4.dns: 8.8.8.8, 8.8.4.4 ipv4.dns-search: ipv4.addresses: { ip = 192.168.1.128/24, gw = 192.168.1.1 } ipv4.routes: ipv4.ignore-auto-routes: no ipv4.ignore-auto-dns: no ipv4.dhcp-client-id: -- ipv4.dhcp-send-hostname: yes ipv4.dhcp-hostname: -- ipv4.never-default: no ipv4.may-fail: yes ipv6.method: ignore ipv6.dns: ipv6.dns-search: ipv6.addresses: ipv6.routes: ipv6.ignore-auto-routes: no ipv6.ignore-auto-dns: no ipv6.never-default: no ipv6.may-fail: yes ipv6.ip6-privacy: -1 (未知) ipv6.dhcp-hostname: -- GENERAL.名称: eth0 GENERAL.UUID: 8071cc7b-d407-4dea-a41e-16f7d2e75ee9 GENERAL.设备: ens33 GENERAL.状态: 已激活 GENERAL.默认: 是 GENERAL.DEFAULT6: 否 GENERAL.VPN: 否 GENERAL.ZONE: -- GENERAL.DBUS-PATH: /org/freedesktop/NetworkManager/ActiveConnection/1 GENERAL.CON-PATH: /org/freedesktop/NetworkManager/Settings/0 GENERAL.SPEC 对象: -- GENERAL.MASTER-PATH: -- IP4.地址[1]: ip = 192.168.1.128/24, gw = 192.168.1.1 IP4.DNS[1]: 8.8.8.8 IP4.DNS[2]: 8.8.4.4 IP6.地址[1]: ip = fe80::20c:29ff:fe25:cdbf/64, gw = :: [root@sky ~]#
[root@sky ~]# cd /etc/sysconfig/
[root@sky sysconfig]# cat grub GRUB_TIMEOUT=5 GRUB_DISTRIBUTOR="$(sed ‘s, release .*$,,g‘ /etc/system-release)" GRUB_DEFAULT=saved GRUB_DISABLE_SUBMENU=true GRUB_TERMINAL_OUTPUT="console" GRUB_CMDLINE_LINUX="rd.lvm.lv=rhel/root crashkernel=auto rd.lvm.lv=rhel/swap vconsole.font=latarcyrheb-sun16 net.ifnames=0 biosdevname=0 vconsole.keymap=us rhgb quiet" GRUB_DISABLE_RECOVERY="true" [root@sky sysconfig]# grub2-mkconfig -o /boot/grub2/grub.cfg
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原文地址：http://www.cnblogs.com/skyfly0772/p/5003572.html
