Cloud Applications

China Telecom's optical fiber household has cut off the former ADSL cat. because China Telecom's wireless cat is used, my wireless route is useless for the moment. My dedicated PC must also use a wireless network card, because it is a dual system,

First, you need to know two special devices:/dev/null: recycle bin, bottomless directory/dev/zero: generate character & amp; Oslash; test disk write capacity timeddif/dev/zeroof/test. dbfbs8kcount300000 because/dev // zero is a pseudo device, it

Today, a user asked me a question: he wants to delete all Chinese characters in a script. This problem makes me a little hard at once. if I delete one or two Chinese characters in the script, it is my first time to match all Chinese characters. So I

CentOS version 6.2 has been released and can now be used in the production environment. the new kernel version can also make better use of hardware. I wrote a script to initialize the system environment. now, you can modify the script as needed. The

After the SVN server is started, the SVN repository is created. this SVN repository is generally run on the server and runs on linux. In my blog, the server is the local machine (127.0.0.1), and the client is also the local machine. The following is

Ubuntu has switched to Unity, but I am not used to Unity. On the contrary, I like Gnome3 very much. In fact, on Ubuntu, Unity and Gnome3 can coexist completely. However, since Unity is not used and it still needs to be updated, simply delete it. I

Git has been used for some time. from the first day of using git, we plan to gradually discard svn. all functions of svn can be done by git, and git is doing better. besides, git has many other features that svn cannot meet. what is the reason for

I. usage of make in linux objective: to master the usage of make and to program on Linux. Environment: Linux system preparation: prepare three files: file1.c, file2.c, and file2.hfile1. c: # include & lt; stdio. h & gt; # include & quot; file2.h &

Install Samba and install sambasudoapt-getinstallsamba. The first step is to create a shared directory. for example, to create/home/username/share, create the folder first (this username is your username, I wrote this for ease of understanding.

Pom. xml: 1 & lt; dependency & gt; 2 & lt; groupId & gt; javax. servlet & lt;/groupId & gt; 3 & lt; artifactId & gt; javax. servlet-api & lt;/artifactId & gt; 4 & lt; version & gt; 3.0.1 & lt;/version pom. xml:   1 2 Javax. servlet 3

Couldnotretrievemirrorlisthttp: // inclulist.centos.org /? Release5 & amp; archi386 & amp; repoaddonserror error: [root@servermysql-5.0.56] # yuminstallgccLoadedplu CentOS yum when "cocould not retrieve into list http://mirrorlist.centos.org /?

Apache startup error: httpd: Startup & amp; #39; sfullyqualifieddomainname [root@serverhttpd-2.2.4] #/usr/local/apache/bin/apachectlstarthttpd: Couldn apache startup error: httpd: cocould not reliably determine the server's fully qualified domain

& Amp; #65279; & amp; #65279; uinq is short for unique. I. description: checks and deletes the repeated rows and columns in a text file. syntax: uniq [-cdu] [-f & lt; Column & gt;] [-s & lt; character position & gt;] [-w & lt; character Location &

In linux, crontab files are often maintained using the crontab command to submit scheduled jobs. Before introducing the crontab command, let's take a look at the format and meaning of each field in each entry in the crontab file. Each crontab entry

Due to Nginx's outstanding performance, more and more web servers use Nginx. Although nginx is great, what if it crashes? We 'd better write a script for monitoring. If nginx fails, the system restarts automatically. Of course, before giving the

WebDAV (Web-basedDistributedAuthoringandVersioning) is a communication protocol based on HTTP1.1. It adds some extensions for HTTP1.1 (that is, some new methods are added in addition to several HTTP standard methods such as GET, POST, and HEAD), so

When hadoop is used, the startup fails, and therearestoppedjobs appears at the restart. the solution is as follows: 1. query the current jobs: $ jobs $ jobs2 and end jobs: $ kill % id $ kill % idid is the number of the job listed in 1. 3. activate

1. display cpu quantity: hp-unix: ioscan-Cprocessor | grepprocessor | wc-lSolais: psrinfo-v | grep & quot; Statusofprocessor & quot; | wc-llinux: cat/proc/cpuinfo | grepprocessor... 1. display the number of CPUs: Hp-unix: ioscan-C processor | grep

Linux kernel version 3.2.0 (uname-r can be viewed) Ubuntu version 10.04 (view the method of http://www.cnblogs.com/zero1665/archive/2010/05/24/1742962.html) through http://www.kernel.org/download the internal kernel unzip to a certain version, I

Sometimes I am also troubled by this problem. I don't know whether I don't understand or whether the world is changing too fast. Even Linux introduces the concept of expiration. Set a time. if the time has reached, some things will happen. For