Install Apache Php Mysql On Amazon Linux Install' title='Install Apache Php Mysql On Amazon Linux Install' />Hadoop 2.Installing on Ubuntu 1.Single Node Cluster.Hadoop on Ubuntu 1.In this chapter, well install a single node Hadoop cluster backed by the Hadoop Distributed File System on Ubuntu.Installing Java. Hadoop framework is written in Java Update the source list.In this tutorial I will describe how you can upgrade OpenSSL on RHEL and CentOS systems.OpenSSL is an open source tools for using the Secure Socket Layer.The Perfect Server Debian 9 Stretch with Apache, BIND, Dovecot, PureFTPD and ISPConfig 3.This article will help you to install PHP 7, Apache 2.MySQL 5. 6 on CentOS RHEL 7.Install Apache Php Mysql On Amazon Linux Install' title='Install Apache Php Mysql On Amazon Linux Install' />The Open.JDK project is the default version of Java.Ubuntu repository.Open. JDK Runtime Environment Iced.Tea 2. 5. 3 7u. Open.JDK 6. 4 Bit Server VM build 2.Adding a dedicated Hadoop user.Adding group hadoop GID 1.Adding user hduser.Adding new user hduser 1.Creating home directory homehduser.Copying files from etcskel.Enter new UNIX password.Retype new UNIX password.Changing the user information for hduser.Enter the new value, or press ENTER for the default.Full Name. Room Number.Work Phone. Home Phone.Is the information correct Yn Y.Installing SSHssh has two main components ssh The command we use to connect to remote machines the client.The daemon that is running on the server and allows clients to connect to the server.The ssh is pre enabled on Linux, but in order to start sshd daemon, we need to install ssh first.Use this command to do that.This will install ssh on our machine.If we get something similar to the following, we can think it is setup properly.Create and Setup SSH Certificates.Hadoop requires SSH access to manage its nodes, i.For our single node setup of Hadoop, we therefore need to configure SSH access to localhost.So, we need to have SSH up and running on our machine and configured it to allow SSH public key authentication.Hadoop uses SSH to access its nodes which would normally require the user to enter a password.However, this requirement can be eliminated by creating and setting up SSH certificates using the following commands.If asked for a filename just leave it blank and press the enter key to continue.P. Generating publicprivate rsa key pair.Enter file in which to save the key homehduser.Created directory homehduser.Your identification has been saved in homehduser.Your public key has been saved in homehduser.The key fingerprint is.The keys randomart image is.RSA 2. 04. 8. E. S.O. O o. HOME. sshidrsa.HOME. sshauthorizedkeys.The second command adds the newly created key to the list of authorized keys so that Hadoop can use ssh without prompting for a password.We can check if ssh works.The authenticity of host localhost 1.ECDSA key fingerprint is e.Are you sure you want to continue connecting yesno Warning Permanently added localhost ECDSA to the list of known hosts.Welcome to Ubuntu 1.LTS GNULinux 3. We want to move the Hadoop installation to the usrlocalhadoop directory using the following command.This incident will be reported.Oops. We got. hduser is not in the sudoers file.This incident will be reported.This error can be resolved by logging in as a root user, and then add hduser to sudo.Adding user hduser to group sudo.Adding user hduser to group sudo.Now, the hduser has root priviledge, we can move the Hadoop installation to the usrlocalhadoop directory without any problem.R hduser hadoop usrlocalhadoop.Setup Configuration Files.The following files will have to be modified to complete the Hadoop setup.Before editing the.Java has been installed to set the JAVAHOME environment variable using the following command.There is only one alternative in link group java providing usrbinjava usrlibjvmjava 7 openjdk amd.Nothing to configure.Now we can append the following to the end of.HADOOP VARIABLES START.JAVAHOMEusrlibjvmjava 7 openjdk amd.HADOOPINSTALLusrlocalhadoop.PATHPATH HADOOPINSTALLbin.PATHPATH HADOOPINSTALLsbin.HADOOPMAPREDHOMEHADOOPINSTALL.HADOOPCOMMONHOMEHADOOPINSTALL.HADOOPHDFSHOMEHADOOPINSTALL.YARNHOMEHADOOPINSTALL.HADOOPCOMMONLIBNATIVEDIRHADOOPINSTALLlibnative.HADOOPOPTS Djava.HADOOPINSTALLlib.HADOOP VARIABLES END.JAVAHOME should be set as the path just before the.Virtual. Box javac version.Virtual. Box which javac.Virtual. Box readlink f usrbinjavac.We need to set JAVAHOME by modifying hadoop env.JAVAHOMEusrlibjvmjava 7 openjdk amd.Adding the above statement in the hadoop env.JAVAHOME variable will be available to Hadoop whenever it is started up.The usrlocalhadoopetchadoopcore site.Hadoop uses when starting up.This file can be used to override the default settings that Hadoop starts with.Open the file and enter the following in between the lt configuration lt configuration tag.A base for other temporary directories.The name of the default file system.A URI whose. scheme and authority determine the File.System implementation.The. uris scheme determines the config property fs.SCHEME. impl naming.File. System implementation class.The uris authority is used to.By default, the usrlocalhadoopetchadoop folder contains usrlocalhadoopetchadoopmapred site.The mapred site. Map.Reduce. We need to.The host and port that the Map.Reduce job tracker runs.If local, then jobs are run in process as a single map.The usrlocalhadoopetchadoophdfs site.It is used to specify the directories which will be used as the namenode and the datanode on that host.Before editing this file, we need to create two directories which will contain the namenode and the datanode for this Hadoop installation.This can be done using the following commands.R hduser hadoop usrlocalhadoopstore.Open the file and enter the following content in between the lt configuration lt configuration tag.Default block replication.The actual number of replications can be specified when the file is created.The default is used if replication is not specified in create time.Format the New Hadoop Filesystem.Now, the Hadoop file system needs to be formatted so that we can start to use it.The format command should be issued with write permission since it creates current directory under usrlocalhadoopstorehdfsnamenode folder.DEPRECATED Use of this script to execute hdfs command is deprecated.Instead use the hdfs command for it.INFO namenode. Name.Node STARTUPMSG. STARTUPMSG Starting Name.Node. STARTUPMSG host laptop1.STARTUPMSG args format.STARTUPMSG version 2.STARTUPMSG classpath usrlocalhadoopetchadoop.STARTUPMSG java 1.INFO namenode. Name.Node registered UNIX signal handlers for TERM, HUP, INT.INFO namenode. Name.Node create. Name.Node format. 1. WARN util.Native. Code. Loader Unable to load native hadoop library for your platform.Formatting using clusterid CID e.INFO namenode. FSNamesystem No Key.Provider found. 1.INFO namenode. FSNamesystem fs.Lock is fair true.INFO blockmanagement.Datanode. Manager dfs.INFO blockmanagement.Datanode. Manager dfs.INFO blockmanagement.Block. Manager dfs.INFO blockmanagement.Block. Manager The block deletion will start around 2.Apr 1. 8 1. 4 4. INFO util.GSet Computing capacity for map Blocks. Angry Birds Star Wars 2 Pc Crack on this page. Map. 1. 50. 41. INFO util.GSet VM type 6. INFO util.GSet 2. MB 1. 7. 8 MB.INFO util. GSet capacity 22.INFO blockmanagement.Block. Manager dfs.INFO blockmanagement.Block. Manager default.Replication 1. INFO blockmanagement.Block. Manager max.Replication 5. INFO blockmanagement.Block. Manager min.Replication 1. INFO blockmanagement.Block. Manager max.Replication. Streams 2.INFO blockmanagement.Block. Manager should.Check. For. Enough.Racks false. 1. INFO blockmanagement.Block. Manager replication.Recheck. Interval 3.INFO blockmanagement.Block. Manager encrypt.Data. Transfer false.INFO blockmanagement.Block. Manager max.Num. Blocks. To. Log 1.INFO namenode. FSNamesystem fs.Owner hduser auth SIMPLE.INFO namenode. FSNamesystem supergroup supergroup.INFO namenode. FSNamesystem is.Permission. Enabled true.INFO namenode. FSNamesystem HA Enabled false.INFO namenode. FSNamesystem Append Enabled true.INFO util. GSet Computing capacity for map INode.Map. 1. 50. 41. INFO util.GSet VM type 6. INFO util.GSet 1. MB 8. 9 MB.INFO util. GSet capacity 22.INFO namenode. Name.Node Caching file names occuring more than 1.INFO util. GSet Computing capacity for map cached.Blocks. 1. 50. 41.INFO util. GSet VM type 6.INFO util. GSet 0.MB 2. 2 MB. 1. 50.Apache Tips Tricks Hide apache software version.Applies apache 1.Required apache module included in core.Scope global server configuration.Type security. Description How to hide the apache software version to remote requests.Useful to not disclose un needed information.As shown in Discover the web server software and version of a remote server anyone can find our valuable information from our apache server banner.What version are we runningToo many information This will not protect in any way from real vulnerabilities if they exist, but it will at least make their life harder.This will also not stop more complex fingerprinting programs to detect some information on the web server, but at least we should not make their life easier.I will talk in this post about setting two apache directives Server.Tokens and Server.Signature and how they can be used.Basically to provide only a minimal amount of information we will set this in the main config to Server.Tokens Product. Only.Server. Signature Off.Thats it For a more detailed describtion check out the rest of the post.Server. Tokens. This directive controls whether Server response header field which is sent back to clients includes a description of the generic OS type of the server as well as information about compiled in modules.Full Server. Tokens Full.So if your Linux distribution has not overwritten this, then you will be presenting all the possible information to the world.For example RHEL will set this to Server.Tokens OS, while Debian will not set anything leaving it to default Full.Possible values Server.Tokens Setting. Server Banner Header.Product. Only. Server Apache.Major. Server Apache2.Minor. Server Apache2.Minimal. Server Apache2.OSServer Apache2.DebianFull or not specified default.Server Apache2. Debian PHP5.Open. SSL0. 9. 8b.Starting with apache version 2.Server. Signature directive described bellow.Server. Signature.This directive allows the configuration of a trailing footer line under server generated documents error messages, modproxy ftp directory listings, etc.Server. Signature Off, but some particular Linux distributions might enable this.For example Debian package enables Server.Signature on the default vhost.Off can be overwritten on vhosts or directory level.So you might want to be sure that this is not the case.Possible values. Off default suppresses the footer line.On adds a line with the server version number and Server.Name of the serving virtual host.After version 2. 0.Server. Tokens directive.EMail includes all the information set with ON and additionally creates a mailto reference to the Server.Admin. Note setting the directives shown to provide minimal information will not make your server more secure.If you have vulnerable versions you should upgrade them as soon as possible.Still, there are many worms that will check this banner and if they find something they like for example a vulnerable modssl they will launch the attack.But there are also many such worms that will not check anything and just try to exploit any server Also there are other complex fingerprinting applications that can find out various information about your web server even with these directives set to minimum But even in this case there are many advantages and they will not be able to get such accurate information as presented in the apache banner.Conclusion if you want to provide minimum information about your system set this in your main apache config Server.Tokens Product. Only.Server. Signature Off.Some. Web. Server for ex.Apache. Go to. Main page of all my Apache Tips Tricks.
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