garystafford

###############################################################################
# Helpful Docker commands and code snippets
###############################################################################

### CONTAINERS ###
docker stop $(docker ps -a -q) #stop ALL containers
docker rm -f $(docker ps -a -q) # remove ALL containers
docker rm -f $(sudo docker ps --before="container_id_here" -q) # can also filter

# exec into container

ewenchou

1. Create a service file like dash_sniffer.service
2. Put it in /lib/systemd/system/
3. Reload systemd using command: systemctl daemon-reload
4. Enable auto start using command: systemctl enable dash_sniffer.service

DmitrySoshnikov

# "Understanding Python's closures".
#
# Tested in Python 3.1.2
#
# General points:
#
#    1. Closured lexical environments are stored
#       in the property __closure__ of a function
#
#    2. If a function does not use free variables

mayank-io

-- Running this snippet creates a function. This function can then be executed
-- in this manner:
--          SELECT truncate_tables('postgres');

CREATE OR REPLACE FUNCTION truncate_tables(_username text)
  RETURNS void AS
$func$
BEGIN
   RAISE NOTICE '%', 
   -- EXECUTE  -- dangerous, test before you execute!

laixintao

------------------------------commit------------------------------
$ git status                                    # 检查文件当前的状态
$ git add [文件名]                               # 追踪新的文件
$ git diff --cached                             # 若要看已经暂存起来的文件和上次提交时的快照之间的差异
$ git commit -m "Story 182: Fix benchmark"      # 用一行命令提交更新
$ git commit -a -m 'added new benchmarks'       # 跳过add命令直接提交
$ git rm --cached log.log                       # 从git仓库中删除不小心追踪的文件（用于gitignore之前追踪的文件）                   
$ git mv file_from file_to                      # 移动文件/重命名文件

------------------------------branch------------------------------

riobard

# My ISP-provided fiber optical modem broadcasts a line of a poem every ten seconds. Here's the tcpdump of the complete poem.
# The optical modem is made by Shanghai Nokia-Bell Co.,Ltd and its model number is G-140W-UD. It's provided by my ISP, China Unicom in Shenzhen.

$ tcpdump -i vlan10 ether proto 0x8300
15:59:00.720301 00:00:00:00:00:12 (oui Ethernet) > Broadcast, ethertype Unknown (0x8300), length 72: 
	0x0000:  0000 0000 e4ea 8386 d93c 5468 6520 6461  .........<The.da
	0x0010:  7920 4920 6c6f 7374 206d 7920 7665 7279  y.I.lost.my.very
	0x0020:  2066 6972 7374 2074 6f6f 7468 2c00 0000  .first.tooth,...
	0x0030:  0000 0000 0000 0000 0000                 ..........
15:59:10.740778 00:00:00:00:00:12 (oui Ethernet) > Broadcast, ethertype Unknown (0x8300), length 72: 

Jiezhi

# Setting the prefix from C-b to C-a
set -g prefix C-a

# Free the original Ctrl-b prefix keybinding
unbind C-b

#setting the delay between prefix and command
set -sg escape-time 1

# Ensure that we can send Ctrl-A to other apps

bonsaiviking

" Vim indent file
" Language:		Lua
" Maintainer:		Daniel Miller <daniel@bonsaiviking.com>
" Original Author:	Daniel Miller <daniel@bonsaiviking.com>
" Last Change:		2014 Feb 6

" Only load this indent file when no other was loaded.
if exists("b:did_indent")
  finish
endif

toast38coza

# start / stop / restart / status
systemctl start test
systemctl stop test
systemctl restart test
systemctl status test

# logs use journalctl: 

# tail the logs for unit `django`
journalctl -f -u django

lgyanf

# -*- coding: utf-8 -*-

import collections
import yaml

from rest_framework import fields

"""
Convert rest_framework.fields classes to Swagger data types according to http://swagger.io/specification/
Return 'string' by default.