Cloud Applications

Ubuntu DNS server configuration server IP: 10.68.19.61 Operating system: Ubuntu13.04DNS program: Bind9 test domain name: mycloud.com destination IP: 10.68.19.134 configuration step 1. install the BIND9 package [plain] & lt; spanstyle & quot;

Linux files are sorted by column to get top-related awk target: Data in Hive, sorted by the total traffic size of users in each category. now we need to retrieve the top10.Hive of each category and use orderbycategoryId and trafficdesc to sort the

Linux Bash environment variable command execution order 1 execute command in relative/absolute PATH 2 find this command by alias execute 3 execute command built in bash 4 search first through the $ PATH variable order command to execute loginshell

Linux ssh login Permanentlyadded (RSA) tothelistofknownhosts to solve the problem of using the user name + password to log on to the following problems: 1 [root @ www] # sshadmin@xxx.xxx.xxx.xxx2Theauthenticityofhost & amp; #39; in xxx linux, ssh

/Var/spool/clientmqueue analysis and massive file deletion processing many files exist in the/var/spool/clientmqueue directory of a server. the ls has to be executed for a long time and has been checked online, record: cause: a user in the system

In CentOS, sudo is installed in CentOS by default. However, before configuration, only the root user can use sudo. Therefore, you need to make a slight modification to add the current user to the sudoers list. 1. the sudo user list is stored in

An error occurred while initializing the month string. after logging on to the system, ls-l always prompts that an error occurred while initializing the month string. the solution is as follows: sudovi/var/lib/locales/supported. d/local # modify the

A brief introduction to Linux software installation: For Windows users, software installation is really not knowledgeable. the software will be installed after "Next" or "change path. But it's not that easy in Linux. There are three main methods for

Linux shell comparison operator description example file comparison operator-efilename if filename exists, it is true [-e/var/log/syslog]-dfilename if filename is a directory, it is true [-d/tmp/mydir]-ffil... linux shell comparison operator

Show the line number when viewing the file in linux [root @ 1-minetc] # cat-nrsyslog.conf // show all lines (including empty lines) [root @ 1-minetc] # cat-brsyslog.conf // display all row numbers (but not empty rows) or :... in linux, the row

Java code #! /Bin/bash # memcachedInitfileforstartingandstopping # chkconfig: 358030 # description: memcachedstartupscript # Sourcefunctionli example of a service Java code #! /Bin/bash # memcached Init file for starting and stopping # chkconfig: 35

Configure mailserver in linux 1. configure yum installation tool ① enter the yum Directory [root @ bj ~] # Cd/etc/yum. repos. d ② configure yum. repo [root@bjyum.repos.d] # cprhel-debuginfo.repoyum.repo convert yum. modify repo to the following

Vim replacement operations are often used: % s/oldstring/newstring/g and: % s/oldstring/newstring/gc to replace the oldstring in vim with newstring. Today, when marking samples, I searched for more vim replacement operations and sorted them as

Introduction to linux performance optimization 4: log isolation in the file system 1. the ext3 file system adds the log function on the basis of ext2 to ensure data consistency like a database. Ext2: write block before, and then write inode! Ext3:

The difference between solaris and linux commands is that although solaris and linux are both unix kernels, many commands are still different. I collected their differences online and shared them. 1) Check the open port Linux: netstat-atnSolaris:

In linux (centos6), you can adjust the size of the Mount partition and install centos6. we recommend that you use auto-recommended partitions. in this case, the/home partition is too large. Target:/home is 20 GB, and the remaining value is added to

First, apt-getupdate is required, and then apt-getinstallsquid is installed to configure and enable vi/usr/local/squid/etc/squid. conf3.1 change listener Port http_port90903.2 change access control http_accessallow... to configure squid3, you must

Linux hard disk detection badblocks function description: check the damaged blocks in the disk device. Syntax: badblocks [-svw] [-B & lt; block size & gt;] [-o & lt; output file & gt;] [disk device] [number of disk blocks] [start Block]

Nginx log cutting Generation 1. nginx log cutting # crontab-e5923 ***/usr/local/sbin/logcron. sh/dev/null2 & gt; & amp; 1 [root @ count ~] # Cat/usr/local/sbin/logcron. sh1 .#! /Bin/bash2.log Nginx log cut Generation 1. nginx log cutting # crontab-e5

Ubuntu12.04vimgedit Chinese garbled characters to solve the problem of adding Chinese character encoding: $ sudovim/var/lib/locales/supported. d/local # add the following Chinese character set zh_CN.GBKGBKzh_CN.GB2312GB2312zh_CN.GB18030GB18030 to