Linux 第17天: (09月02日) 练习和作业
netstat -nt 查看网络连接
netstat -no 查看网络连接win
tasklist |findstr ??? 查看进程win
echo 50 > /proc/sys/net/ipv4/ip_default_ttl 改ttl值
ping -f 10.1.250.95 -s 65507 icmp攻击
echo 1 > /proc/sys/net/ipv4/icmp_echo_ignore_all 不回应ping
echo 1 > /proc/sys/net/ipv4/icmp_echo_ignore_broadcasts 不回应广播
arp 查看arp表
ip neigh 查看arp表
1 1
10 2
100 4
1000 8
10000 16
100000 32
1000000 64
10000000 128
bc
ibase=2
obase=10
2 输入十进制数
10 算出二进制数
let i=2#1000
echo $i
/etc/udev/rules.d/70-persistent-net.rules 网卡改名
/etc/sysconfig/network-scripts/ifcfg-eth0 网卡配置,含设备名
BOOTPROTO=none 或 DHCP
IPADDR=x.x.x.x
PREFIX=16
GATEWAY=
DNS1=
DNS2=
DNS3=
HWADDR改为MACADDR
chkconfig --list NetworkManager
service NetworkManager status
service NetworkManager restart
service NetworkManager stop 临时关闭
chkconfig NetworkManager off 永久关闭
systemctl status NetworkManager
systemctl stop NetworkManager
service network restart
ifconfig eth0 down 禁用网卡
ifconfig -a 查看所有网卡
route -n 查看路由
cat /etc/resolv.conf 查看dns
cp ifcfg-eth0 ifcfg-eth0:100 配置网卡别名,多个IP
bonding多个网卡一个IP实验
vim ifcfg-bond0 bonding
DEVICE=bond0
IPADDR=x.x.x.x
PREFIX=16
GATEWAY=x.x.x.x
DNS1=
BONDING_OPTS="miimon=100 mode=1"
vim ifcfg-eth0
DEVICE=etho
SLAVE=yes
MASTER=bond0
cat /proc/net/bonding/bond0
PC--R1--R2--PC2 实验
chkconfig NetworkManager off 永久关闭
service NetworkManager stop 临时关闭
vim /etc/sysconfig/network-scripts/ifcfg-eth0
DEVICE=eth0
IPADDR=192.168.0.1
PREFIX=24
vim /etc/sysconfig/network-scripts/ifcfg-eth1
DEVICE=eth1
IPADDR=10.0.0.1
PREFIX=8
service network restart
route add -net 172.16.0.0/16 gw 10.0.0.2 dev eth1
echo 1 > /proc/sys/net/ipv4/ip_forward
iptable -F
chkconfig NetworkManager off 永久关闭
service NetworkManager stop 临时关闭
vim /etc/sysconfig/network-scripts/ifcfg-eth0
DEVICE=eth0
IPADDR=172.16.0.1
PREFIX=16
vim /etc/sysconfig/network-scripts/ifcfg-eth1
DEVICE=eth1
IPADDR=10.0.0.2
PREFIX=8
service network restart
route add -net 192.168.0.0/24 gw 10.0.0.1 dev eth1
echo 1 > /proc/sys/net/ipv4/ip_forward
iptable -F
rpm -qa "kernel*"
yum -y install kernel-doc
cd /usr/share/doc/kernel-doc-2.6.32/Documentation/
cd networking
less bonding.txt
lsmod |grep binding
rmmod binding
ifconfig
ethtool -i eth0 查看网卡
dmesg |grep -i eth 查看网卡
lsmod |grep e1000
rmmod e1000 卸载网卡驱动
modprobe -r e1000 卸载网卡驱动
modprobe e1000 装载网卡驱动
service network restart
locate e1000.ko 查找驱动文件
/lib/modules/2.6.32-573.el6.x86_64/kernel/drivers/net/e1000/e1000.ko
/lib/modules/2.6.32-642.el6.x86_64/kernel/drivers/net/e1000/e1000.ko
uname -r
rpm -e kernel-2.6.32-573.e16.x86_64
路由
yum -y install quagga
cd /etc/quagga
ls
cp ospf.conf.sample ospfd.conf
service ospfd start
vtysh 思科类似配置
netstat -tunpl
route -n
netstat -r 查看路由表
ifconfig -s 查看连接
netstat -i 查看连接
watch -n 1 netstat -i
ping -f x.x.x.x
ping -a xxxx 通过IP查电脑名
ip link 查看网卡
ifup eth1 启用网卡
ifconfig eth1 up 启用网卡
ifconfig 查看网卡
ip addr 查看网卡
ip addr flush dev eth1 清除IP
ip addr add
ip addr del
service network restart
systemctl restart network
cd /etc/sysconfig/network-scripts/
cp cp ifcfg-eth0 ifcfg-eth1
vim /etc/sysconfi/network-scripts/route-eth1 路由配置文件
192.168.0.0/24 via 172.16.0.2
或者
ADDRESS1=192.168.0.0
NETMASK1=255.255.255.0
GATEWAY1=172.16.0.2
## route add -net 192.168.0.0/24 gw 172.16.0.2 dev/eth1