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
=== VNCServer ===
systemctl start vncserver@:5.service
systemctl enable 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
=== Fireware ===
telnet 10.74.54.208 37 |hexdump
0000000 7254 6979 676e 3120 2e30 3437 352e 2e34
0000010 3032 2e38 2e2e 0a0d 6f43 6e6e 6365 6574
0000020 2064 6f74 3120 2e30 3437 352e 2e34 3032
0000030 2e38 0a0d 7345 6163 6570 6320 6168 6172
0000040 7463 7265 6920 2073 5e27 275d 0d2e dd0a
Connection closed by foreign host.
0000050 1f22 003a                              
0000053

sudo firewall-cmd --permanent --add-port=37/tcp
sudo firewall-cmd --permanent --add-port=37/udp
sudo firewall-cmd --reload