zhangchenchen

## remote forward ##

iptables -t nat -A PREROUTING -d LocalIP -p tcp --dport PortNumber -j DNAT --to-destination DestinationIP:Port

iptables -t nat -A POSTROUTING -d estinationIP -p tcp --dport PortNumber -j SNAT --to-source LocalIP

## local forward ##

 iptables -t nat -A PREROUTING -p tcp --dport 80 -j REDIRECT --to-ports 8080
 

zhangchenchen

salt '*' cmd.run 'mkdir ~/.ssh && chmod 700 ~/.ssh'
salt-cp '*' ~/.ssh/id_rsa.pub ~/.ssh/temp.pub
salt '*' cmd.run 'cat ~/.ssh/temp.pub >> ~/.ssh/authorized_keys && rm -f ~/.ssh/temp.pub'

zhangchenchen

tmux shortcuts & cheatsheet

start new:

tmux

start new with session name:

tmux new -s myname

zhangchenchen

    :s/vivian/sky/ 替换当前行第一个 vivian 为 sky

　　:s/vivian/sky/g 替换当前行所有 vivian 为 sky

　　:n,$s/vivian/sky/ 替换第 n 行开始到最后一行中每一行的第一个 vivian 为 sky

　　:n,$s/vivian/sky/g 替换第 n 行开始到最后一行中每一行所有 vivian 为 sky

　　n 为数字，若 n 为 .，表示从当前行开始到最后一行

zhangchenchen

sed -i "s/oldString/newString/g"  `grep oldString -rl /etc`

#  -i substitute in place

zhangchenchen

grep -rnw '/path/to/somewhere/' -e "pattern"
-r or -R is recursive,
-n is line number, and
-w stands match the whole word.
-l (lower-case L) can be added to just give the file name of matching files.
Along with these, --exclude or --include parameter could be used for efficient searching. Something like below:
grep --include=\*.{c,h} -rnw '/path/to/somewhere/' -e "pattern"
This will only search through the files which have .c or .h extensions. 

zhangchenchen

download file:   scp test.py  user@192.168.0.231:/e:/
download dir:  scp -r /opt/test  user@192.168.0.231:/e:/

upload file: scp  user@192.168.0.231:/e:/test.py /opt/test
upload dir: scp -r user@192.168.0.231:/e:/test/ /opt/test

zhangchenchen

#!/usr/bin/env python
# -*- coding: utf-8 -*-

import sys, re
import requests
import Queue
import threading

class Proxy():
    def __init__(self, proxy_url, target_url, ver_keyword, timeout):