一些小参考

$ mkdir learngit$ cd learngit$ pwd/root/learngit$ git init

xxxxxxxxxx$ git add readme.txt$ git commit -m "wrote a readme file"(""内的为本次更改的说明)

xxxxxxxxxx$ git status

xxxxxxxxxx$ git diff readme.txt 

xxxxxxxxxx$ git log$ git reflog(更强大)

xxxxxxxxxx$ git reset --hard (version number or HEAD^)

xxxxxxxxxx$ git checkout -- readme.txt

xxxxxxxxxx$ git reset HEAD readme.txt$ git checkout -- readme.txt

xxxxxxxxxx$ git rm test.txt

xxxxxxxxxx$ ssh-keygen -t rsa -C "youremail@example.com"#在/root/User/.ssh/id_rsa.pub

xxxxxxxxxx$ git remote add origin git@github.com:url

xxxxxxxxxx$ git push <远程主机名> <本地分支名>:<远程分支名>(本地==远程可以不用谢、写远程)$ git push origin(push all)

xxxxxxxxxx$ git remote rm origin

xxxxxxxxxx$ git clone git@github.com:michaelliao/gitskills.git

xxxxxxxxxx$ git branch dev

xxxxxxxxxx$ git checkout dev$ git switch master

xxxxxxxxxx$ git merge dev$ git merge --no-ff -m "merge with no-ff" dev(合并分支并且提交一个commiit)

xxxxxxxxxx$ git branch

xxxxxxxxxx$ git stash

xxxxxxxxxx$ git stash pop

xxxxxxxxxx$ git pull <远程主机名> <远程分支名>:<本地分支名>$ git pull origin(拉取全部)$ git pull origin master:brantest

<style type="text/css">h1 {color:red;}p {color:blue;}</style>

​x<img src="planets.gif" width="145" height="126" alt="Planets" usemap="#planetmap">​<map name="planetmap">  <area shape="rect" coords="0,0,82,126" alt="Sun" href="sun.htm">  <area shape="circle" coords="90,58,3" alt="Mercury" href="mercur.htm">  <area shape="circle" coords="124,58,8" alt="Venus" href="venus.htm"></map>

xxxxxxxxxx<h4>单元格跨两列:</h4><table border="1">  <caption>Monthly savings</caption>(表格标题)<tr>  <th>Name</th>(表格头)  <th colspan="2">Telephone</th></tr><tr>  <td>Bill Gates</td>(表格内容)  <td>555 77 854</td>  <td>555 77 855</td></tr></table>​<h4>单元格跨两行:</h4><table border="1"><tr>  <th>First Name:</th>  <td>Bill Gates</td></tr><tr>  <th rowspan="2">Telephone:</th>  <td>555 77 854</td></tr><tr>  <td>555 77 855</td></tr></table>

xxxxxxxxxx<ul><li>Coffee</li><li>Milk</li></ul>

xxxxxxxxxx<ol><li>Coffee</li><li>Milk</li></ol>

xxxxxxxxxx<dl>  <dt>Math</dt>  <dd>Calculas</dd>  <dd>Linear Algebra</dd>  <dt>CS</dt>  <dd>Data Structure</dd>  <dd>Computer Networking</dd></dl>

xxxxxxxxxx<div style="color:#0000FF">  <h3>这是一个在 div 元素中的标题。</h3>  <p>这是一个在 div 元素中的文本。</p></div>

xxxxxxxxxx<div id="container" style="width:500px">​<div id="header" style="background-color:#FFA500;"><h1 style="margin-bottom:0;">主要的网页标题</h1></div>​<div id="menu" style="background-color:#FFD700;height:200px;width:100px;float:left;"><b>菜单</b><br>HTML<br>CSS<br>JavaScript</div>​<div id="content" style="background-color:#EEEEEE;height:200px;width:400px;float:left;">内容在这里</div>​<div id="footer" style="background-color:#FFA500;clear:both;text-align:center;">脚</div>​</div>

xxxxxxxxxx<script>document.write("Hello World!")</script><noscript>抱歉，你的浏览器不支持 JavaScript!</noscript>

xxxxxxxxxx<canvas id="myCanvas" width="200" height="100" style="border:1px solid #c3c3c3;"></canvas>

xxxxxxxxxx<script>在js代码里面画画var c=document.getElementById("myCanvas");var ctx=c.getContext("2d");ctx.fillStyle="#FF0000";ctx.fillRect(0,0,150,75);//路径ctx.moveTo(0,0);ctx.lineTo(200,100);ctx.stroke();ctx.arc(95,50,40,0,2*Math.PI);//圆  // 创建渐变var grd=ctx.createLinearGradient(0,0,200,0);grd.addColorStop(0,"red");grd.addColorStop(1,"white"); // 填充渐变ctx.fillStyle=grd;ctx.fillRect(10,10,150,80);</script>

xxxxxxxxxx<svg xmlns="http://www.w3.org/2000/svg" version="1.1" height="190">  <polygon points="100,10 40,180 190,60 10,60 160,180"  style="fill:lime;stroke:purple;stroke-width:5;fill-rule:evenodd;"></svg>

xxxxxxxxxx<p id="demo">点击按钮获取您当前坐标（可能需要比较长的时间获取）：</p><button onclick="getLocation()">点我</button><script>var x=document.getElementById("demo");function getLocation(){  if (navigator.geolocation)  {    navigator.geolocation.getCurrentPosition(showPosition);  }  else  {    x.innerHTML="该浏览器不支持获取地理位置。";  }}​function showPosition(position){  x.innerHTML="纬度: " + position.coords.latitude +   "<br>经度: " + position.coords.longitude; }function showError(error){  switch(error.code)   {    case error.PERMISSION_DENIED:      x.innerHTML="用户拒绝对获取地理位置的请求。"      break;    case error.POSITION_UNAVAILABLE:      x.innerHTML="位置信息是不可用的。"      break;    case error.TIMEOUT:      x.innerHTML="请求用户地理位置超时。"      break;    case error.UNKNOWN_ERROR:      x.innerHTML="未知错误。"      break;  }}</script>

xxxxxxxxxxdb.transaction(function (tx) {     tx.executeSql('CREATE TABLE IF NOT EXISTS LOGS (id unique, log)');});

xxxxxxxxxxvar i=0;​function timedCount(){    i=i+1;    postMessage(i);    setTimeout("timedCount()",500);}//递归timedCount();

xxxxxxxxxxvar w; function startWorker() {    if(typeof(Worker) !== "undefined") {      //创建workers        if(typeof(w) == "undefined") {            w = new Worker("demo_workers.js");        }      //有message传出来就执行,只要workers没有执行完毕,这里就不会停止        w.onmessage = function(event) {            document.getElementById("result").innerHTML = event.data;        };    } else {        document.getElementById("result").innerHTML = "抱歉，你的浏览器不支持 Web Workers...";    }} function stopWorker() {     w.terminate();    w = undefined;}

xxxxxxxxxxif(typeof(EventSource)!=="undefined"){    // 浏览器支持 Server-Sent    // 一些代码.....  var source=new EventSource("demo_sse.php");//根据php代码来建立EventSource  //根据传来的message来执行动作  source.onmessage=function(event)  {      document.getElementById("result").innerHTML+=event.data + "<br>";  };}else{    // 浏览器不支持 Server-Sent..}

xxxxxxxxxx<script>function clickCounter(){  if(typeof(Storage)!=="undefined")  {    if (sessionStorage.clickcount)    {      sessionStorage.clickcount=Number(sessionStorage.clickcount)+1;    }    else    {      sessionStorage.clickcount=1;    }    document.getElementById("result").innerHTML="在这个会话中你已经点击了该按钮 " + sessionStorage.clickcount + " 次 ";  }  else  {    document.getElementById("result").innerHTML="抱歉，您的浏览器不支持 web 存储";  }}</script><p><button onclick="clickCounter()" type="button">点我！</button></p><div id="result"></div>

cd /usr/bin./mysqld_safe &

xxxxxxxxxxINSERT INTO table_name ( field1, field2,...fieldN )                       VALUES                       ( value1, value2,...valueN );

xxxxxxxxxxSELECT column_name,column_nameFROM table_name[WHERE Clause][LIMIT N][ OFFSET M][WHERE condition1 [AND [OR]] condition2 ORDER BY field1 [ASC [DESC][默认 ASC]], [field2...] [ASC [DESC][默认 ASC]] {OR WHERE field1 LIKE condition1 [AND [OR]] filed2 = 'somevalue'}

xxxxxxxxxxUPDATE table_name SET field1=new-value1, field2=new-value2[WHERE Clause]

xxxxxxxxxxDELETE FROM table_name [WHERE Clause]

xxxxxxxxxxSELECT expression1, expression2, ... expression_nFROM tables[WHERE conditions]UNION [ALL | DISTINCT]SELECT expression1, expression2, ... expression_nFROM tables[WHERE conditions];

xxxxxxxxxxSELECT column_name, function(column_name)FROM table_nameWHERE column_name operator valueGROUP BY column_name;

xxxxxxxxxxSELECT (fields) FROM tableA nickname_for_tableA INNER JOIN tableB nickname_for_tableB ON (statement);