Tommy Nguyen tuannvm

You've launched a revolutionary service not long ago, and were busy improving it for the last couple of months. When you finally decided that the service is perfect, you remembered that you created a feedbacks page long time ago, which you never checked out since then. Now that you have nothing left to do, you would like to have a look at what the community thinks of your service.

Unfortunately it looks like the feedbacks page is far from perfect: each feedback is displayed as a one-line string, and if it's too long there's no way to see what it is about. Naturally, this horrible bug should be fixed. Implement a function that, given a feedback and the size of the screen, splits the feedback into lines so that:

each token (i.e. sequence of non-whitespace characters) belongs to one of the lines entirely; each line is at most size characters long; no line has trailing or leading spaces; each line should have the maximum possible length, assuming that all lines before it were also the longest possible. Example

Everything about Docker!

Bash cheatsheet

Bash cheatsheet
Wait until something works

http://stackoverflow.com/questions/2432764/change-the-uri-url-for-a-remote-git-repository

git remote set-url origin git://new.url.here

unstage file

git reset HEAD <file>
git checkout -- <file>

Ansible cheatsheet

var output = fs.createWriteStream('/where/to/save'+filename);
    output.write(buffer);
    output.end();

	import os
	import re

	BASEPATH = 'root/devops/tasks'
	courses = []
	lastLine = []

	folders = os.listdir(BASEPATH)

	for folder in folders:

	#!/bin/bash
	root=/root/devops/tasks
	find $root -type f -name 'README.txt' > $root/file.txt
	echo "" > $root/subjects.txt

	while read line; do
	sed -n '/\-\-\-/,/\-\-\-/{/\-\-\-/b;/\-\-\-/b;p}' "$line" >> $root/subjects.txt
	done < $root/file.txt

	sed -i '/^\s*$/d' $root/subjects.txt

	- Receive feed: test1.vivatv.vn:80 (rtmp)
	- Wowza ACP: test2.vivatv.vn:8443 (http)
	- Feed output: test3.vivatv.vn:8080 (http)


	bắn feed:
	https://i.imgur.com/tvhRZb9.jpg

	Link play:
	http://test3.vivatv.vn:8080/vivatv-open/<stream key>_aac/playlist.m3u8

	#### For Dev1 first ####

	#### announce an 30 mins maintenance ####

	####backup postgre 9.1 db (about 10 mins)########
	su - postgres
	pg_dumpall > <backup-db>.sql

	####install postgre 9.4 (about 1 mins)####
	wget http://yum.postgresql.org/9.4/redhat/rhel-6-x86_64/pgdg-centos94-9.4-2.noarch.rpm