Shulou(Shulou.com)06/03 Report--

Cloud Computing Learning Route course syllabus Courseware: tCentos6 Network Card problem:

Login history information

[root@robin ~] # last

[root@robin ~] # lastlog

[root@robin ~] # whoami current user identity

Root

[root@robin ~] # who i am original login user identity

Root pts/0 2015-12-02 14:56

Key login

[root@robin ~] # ssh-keygen generates key

[root@robin ~] # ls / root/.ssh/

Id_rsa id_rsa.pub known_hosts

Private key and public key record host information

[root@robin] # ssh-copy-id-I 172.16.110.20 or

[root@robin ~] # scp / root/.ssh/id_rsa.pub 172.16.110.20:/root/.ssh/authorized_keys

Prohibit password login

[root@robin ~] # vim / etc/ssh/sshd_config

PasswordAuthentication no

Log in

[root@robin ~] # ssh root@192.168.10.120

[root@robin ~] # ssh zhb@192.168.10.120

Remote copy

[root@test tmp] # scp / tmp/aa.txt 172.16.110.1:/tmp/

[root@robin ~] # scp / root/install.log 172.16.110.30:/tmp/

[root@robin ~] # scp 172.16.110.30:/tmp/aa.txt 172.16.110.40:/tmp/

Execute command remotely

[root@robin ~] # ssh 172.16.110.30 ls / root/

[root@robin ~] # ssh 172.16.110.30 useradd robin

Configuration file:

# vim / etc/sysconfig/network-s/ifcfg-eth0

DEVICE=eth0 device name

[NAME= "System eth0" device name] may not exist

BOOTPROTO=none Startup Protocol how to obtain ip address static, none = = > static access to dhcp dynamic

NM_CONTROLLED=no defaults to yes to turn off network-manager

ONBOOT=yes boot up

TYPE=Ethernet Ethernet Typ

HWADDR=00:0c:29:8e:a5:d3 mac address

IPADDR=172.16.80.252 ip address

NETMASK=255.255.0.0 mask

PREFIX = 24

NETWORK=172.16.0.0

GATEWAY=172.16.80.1 Gateway

Dns domain name server domain name resolution

Help documentation:

# vim / usr/share/doc/inits-9.03.38/sysconfig.txt

Gateway: the level (exit) of the network, which is generally set to the router

IP forwarding:

Temporary

Echo 1 > / proc/sys/net/ipv4/ip_forward

Permanent

Vim / etc/sysctl.conf modifies kernel parameters

Net.ipv4.ip_forward = 1

Sysctl-p / / effective immediately

Dns: domain name server, one of which is to resolve domain names to Ip addresses

Dns profile (client)

# vim / etc/resolv.conf

Nameserver 172.16.70.250

View mac

# arping 172.16.70.250

Scan ip

# nmap-v-sP 172.16.70.0Unix 24

Scan port

# nmap-v-A 172.16.70.0Univer 24

Restart the network service:

# systemctl restart network / / rhel7

# / etc/init.d/network restart / / rhel5/6

# service network restart / / rhel5/6

Set up a temporary default gateway:

Route Party # route add default gw 172.16.70.1 add default Gateway

Route del default gw 172.16.70.1 Delete default Gateway (rhel5/6) route add default gw 172.16.70.1 add default Gateway route del default gw 172.16.70.1 Delete default Gateway route-n View routing table full digital display

Add a static route:

Route add-net 10.18.45.0 natmask 255.255.255.0 gw 10.18.44.1

Delete a static route:

Route del-net 10.18.45.0 natmask 255.255.255.0 gw 10.18.44.1

Destination Gateway Genmask Flags Metric Ref Use Iface

Destination network gateway

Ip mode (rhel7)

Ip route (r) [list (l)]

Delete default route / gateway

Ip r d default

Delete static rout

Ip r d 10.18.40.0/24

Add default Gateway

Ip r a default via 10.18.44.1 dev (device) enp0s25 routing

Ip r a 10.18.45.0/24 via 10.18.44.1 dev enp0s25

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