查看“Linux cmd”的源代码


=== change ip ===

/etc/network/interfaces
sudo /etc/init.d/network-manager restart
service network-manager restart


route add default gw 10.124.8.1
netstat -rn    看下路由
route del default gw 
route add -net 192.168.0.0/24 gw 192.168.0.1

vnc can not copy
1.vncconfig          ---real vnc
2.autocutsel -s PRIMARY -fork     ----- tite vnc

vncserver config
https://www.digitalocean.com/community/tutorials/how-to-install-and-configure-vnc-remote-access-for-the-gnome-desktop-on-centos-7
sudo systemctl restart vncserver@:5.service

=== FGREP ===
fgrep -R "RPD RPD" *

=== SED ===
sed -i 's/60.10.13.61/60.10.13.66/g' /etc/dhcp/dhcpd.conf

=== awk ===
sudo virsh list | grep running | grep -v grep | awk '{print $2}'   ---- awk  将第二列输出
 awk '{print $2}' | sudo xargs kill -9  ----- xargs 将管道输出作为参数传入
=== netstat ===
netstat -tulpn
=== iptables ===
 iptables -L -n -t nat
./iptables.sh 172.25.13.51 192.168.125.195
sudo iptables -t nat -I PREROUTING -p tcp -d 10.74.54.210 --dport 8190 -j DNAT --to-destination 60.10.13.215:8190
delete ip table all
sudo iptables -F -t nat

[root@smartphy-deployment install]# iptables -P INPUT ACCEPT
[root@smartphy-deployment install]# iptables -P FORWARD ACCEPT
[root@smartphy-deployment install]# iptables -t nat -A POSTROUTING -s 192.168.125.0/24 -o ens192 -j
MASQUERADE -------------源地址转换

sudo iptables -I FORWARD -m state -d 192.168.125.0/24 --state NEW,RELATED,ESTABLISHED -j ACCEPT 转发包
sudo iptables -t nat -I PREROUTING -p tcp -d $1 --dport 8190 -j DNAT --to-destination $2:8190--------目的地址转换
删除nat某一条
sudo iptables -t nat -D PREROUTING  6

sudo iptables -t nat -L --line-number -n | more
=== debug 8190 port ===
nc -s 60.10.13.43 -v 100.1.1.1 8190 ----------向100.1.1.1 8190 模拟发包
sudo tcpdump -i enp4s0f1.608 -n port 8190

no ip route 60.10.13.60 255.255.255.255