baijian’s gists

baijian / php.ini-precision

Last active December 20, 2015 06:39

	the number of significant digits displayed in floating point numbers.
	precision = 14\|12

	当float超过14\|12位时会自动用科学计数法表示，所以需要用$num = springf("%.0f", $number)


	microtime()=>return a string
	microtime(true)=>return a float

	echo sprintf("$.0f", $microtime() * 1000000)

baijian / ssh connect

Last active December 19, 2015 18:19

	ssh connect slow:
	change /etc/ssh/ssh_config to add
	GSSAPIAuthentication no

	run a shell in every 3 miniutes
	/3 * * * /bin/bash /path/to/shell/script



	sudp cp /usr/share/application/empathy.desktop eclipse.desktop

baijian / android-learning

Created July 7, 2013 08:13

some summary of developing android.....

baijian / gist:5464990

Last active December 16, 2015 16:40

mysqldump

	命令导出数据库表or数据:

	>mysqldump -u用戶名 -p密码 -d 數據库名表名脚本名;

	导出数据库所有表结构
	>mysqldump -uroot -password -d dbname > db.sql

	导出数据库table表接口
	>mysqldump -uroot -ppassword -d dbname table > table.sql

baijian / login to the server without passcode

Last active December 16, 2015 11:39

when want to login without password, pay attention to the authority of directory and file

	>client

	ssh-keygen,一直Enter,得到一对rsa的公钥私钥对.

	scp id_rsa.pub user@server.com:~/

	>server

	确保/root权限为750

baijian / team develop

Last active December 16, 2015 01:38

develop project using vagrant

	### Install virtualbo
	https://www.virtualbox.org/wiki/Downloads

	### Install vagrant
	http://downloads.vagrantup.com/

	###
	```
	> vagrant init
	this command just generate a Vagrantfile, this file describe the kind of machine and

baijian / install cgit

Last active December 15, 2015 23:09

	```
	sudo apt-get install build-essential autoconf automake \
	libtool libfcgi-dev spawn-fcgi \
	libssl-dev nginx git-core
	```
	###fcgiwrap
	```
	git clone https://github.com/gnosek/fcgiwrap.git
	cd fcgiwrap/
	autoreconf -i

baijian / crontab problems

Created January 29, 2013 09:40

	>> crontab -e
	* * * * * env > ~/env.tmp

	bash shell
	>>env > ~/env.tmp2

	compare two file: evn.tmp and env.tmp2, you will know why your job can run through shell but can't run through cron.

baijian / Project Object Model

Last active December 11, 2015 09:58

	===
	pom.xml file is essentially the project's metadata file
	that describes the various aspects of the project.
	It describes the project's name, group, version,
	dependecies, and many other things.
	===
	Ok, as we have create a project with maven and
	import it into eclipse, when we develop the project
	we want to use a jar file in our local repository(for example jzmq.jar),
	so we add the jar file into our local repository first,

baijian / create a project with maven

Last active December 11, 2015 08:59

maven is a good thing to manage java project...

	before we start to create a project using maven,
	maybe we should set a proxy.....
	we can use maven archetype plugin to help us to
	create a maven project , you can see archtype
	as a existing template.

	>>mvn archetype:generate
	then terminal will prompt you to choose a number(choose a template),
	because there are a lot of choices, so you can use filter to
	filter some like input "quick", then you can see

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