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Recently installed in Ubuntu16.04 python3.5 and the system comes with the python2.7.13, summarize the different versions of the switching problem. Alias: Aliases BASHRC: Personal Profile First, modify the Python version (for users)To modify a Python version for a particular user, simply create one (alias) in its home directory alias . Open the user's ~/.bashrc file and add the new alias information to modify the Python version that is used by default.Alias python= '/usr/bin/pyt

the TAR.GZ package you downloaded by default3. Set the system default JDKJDK8sudo update-java-alternatives-s java-8-oracleIf the JDK7 is installed and the JDK8 is installed, to switch between the two, you can:JDK8 Switch to Jdk7sudo update-java-alternatives-s java-7-oracleJDK7 Switch to Jdk8sudo update-java-alternatives-s java-8-oracle4. Test whether the JDK was

ubuntu 16.04本身是自带python的，他本身是自带2.X和3.X,两个版本，默认的是2.X。这里记录一下如果在版本间切换以及如何把python版本切换到3.X下的方法。1. See the version of Python installed in Ubuntu and the Python version currently in useLs/usr/bin/python*python--version2. Set Update-alternatives to toggle Python versionShow python in place of version informationUpdate-alternatives--list pythonShow after executionUpdate-alternatives:error:no

First install sun1.6, here I install the directory is/usr/java/jdk1.6.0_45 Then set the profile file/etc/profile (add the file at the end of the file) sudo vim/etc/profile Export java_home=/usr/java/jdk1.6.0_45 export jre_home=/usr/java/jdk1.6.0_45/jre export classpath=.: $JAVA _home/lib/dt.jar: $JAVA _home/lib/tools.jar export path= $PATH: $JAVA _home/bin Source/etc/profile Then install openjdk1.7, you can install it in Software Center, and then execute the following command after installat

Tags: ons file permissions maintenance Ali awt install Oracle ISP download systemDeepin System Manual Installation Oracle Jdk8 detailed tutorialsDownload the JDK archive from Oracle website and extract the files using sudo tar-zxf jdk***, which I placed under the HOME/DIY/JAVA/JDK path.JDK file path:/home/diy/java/jdk/jdk1.8.0_152JDK environment variable ConfigurationModifying a configuration filesudo vi/etc/profileAfter entering, knock on I, then you can edit the content.Add content at the end

tar.gz package for the corresponding JDK, and put it in:/var/cache/oracle-jdk7-installer (JDK7)/var/cache/oracle-jdk8-installer (JDK8)Below, and then install the installer once. Installer will use the TAR.GZ package you downloaded by default3. Set the system default JDKJDk7sudo update-java-alternatives-s java-7-oracleJDK8sudo update-java-alternatives-s java-8-oracleIf the JDK7 is installed and the JDK8 is

. After the installation is complete, verify that[Email protected] ~]# java-"1.6.0_37"1.13. 9) (rhel-1.13. 9.4. el5_11-23.25-b01, Mixed mode)4. The path to the default installation via Yum is/usr/lib/jvm[Email protected] ~]# cd/usr/lib/Jvm[[email protected] jvm]# lltotal -drwxr-xr-x3Root root4096Jan A -: onjava-1.6.0-openjdk-1.6.0.37. x86_64lrwxrwxrwx1Root root +Jan A -: onJRE-/etc/alternatives/jrelrwxrwxrwx1Root root -Jan A -: onjre-1.6.0/etc/

It has been installed several times before, but each time you need to install again and have to re-search the tutorial, to record their own to avoid forgetting.Install JDK DownloadDownload: Click to open the link, I downloaded the filename is jdk-8u66-linux-x64.tar.gzUnzip the installationI'm going to install it under/opt/jvm/.First extract, TAR-ZXVF jdk-8u66-linux-x64.tar.gz, get jdk1.8.0_66Rename and move to/OPT/JVM,mv jdk1.8.0_66/jdk1.8/ mv jdk1.8.0_66//opt/jvm/Setting Environment Variablese

~]$ sudo rm-rf/usr/lib/jdk/jdk1.8.0_11/#删除[Randy@localhost ~]$ LS/USR/LIB/JDKBin Javafx-src.zip Mans Thirdpartylicensereadme-javafx.txtCOPYRIGHT JRE readme.html THIRDPARTYLICENSEREADME.txtDB Lib ReleaseInclude LICENSE Src.zip[Randy@localhost ~]$ 2. Configure Environment variables [Randy@localhost ~]$ sudo vim/etc/profileInsert on last line: #JAVA EnvironmentExport JAVA_HOME=/USR/LIB/JDKExport JRE_HOME=/USR/LIB/JDK/JREExport path= $JAVA _home/bin: $JRE _home/bin: $PATHExport classpath= $C

/index.html Download Java SE 6 Update 33, A jdk-6u33-linux-i586.bin-format file, about 68 MB. STEP 2: Install JDK 6 1. Add execution permissions for jdk-6u33-linux-i586.bin Chmod u + x/usr/lib/jvm/java/jdk-6u33-linux-i586.bin 2. Execute the jdk-6u33-linux-i586.bin and unpack the related files of JDK 6 to the directory of JDK 1.6.0 _ 33. /Jdk-6u33-linux-i586.bin 3. Copy jdk1.6.0 _ 33 to/usr/lib. Mkdir-p/usr/lib/jvm/ Cp-r jdk1.6.0 _ 33/usr/lib/jvm/jdk1.6.0 _ 33 4. Install JDK 6 There are many exec

Install jdk1.7 tomcat7 mysql5.6 on CentOS 6.0 1. pre To facilitate the management of installed software, you need to create a dedicated directoryCd ~ Mkdirdata # diskcddatamkdirsoftware # software installation location mkdirtar_box # tar package storage location 2. setup jdk Use wget to install jdk. Select jdk 7 as the installation source. #cd/data/software #wget--no-cookies--no-check-certificate--header"Cookie:gpw_e24=http%3A%2F%2Fwww.oracle.com%2F;oraclelicense=accept-securebackup-cookie""htt

Jdkhttp: // response Jdk http://download.Oracle.com/otn-pub/java/jdk/7/jdk-7-linux-i586.tar.gz. I installed jdk in/opt/java, so the following code is executed in the Terminal window: Sudo mkdir/opt/java Sudo tarzxvf jdk-7-linux-i586.tar.gz-C/opt/java 1. Open/etc/environment in the editor. Gedit/etc/environment 2. Modify the file PATH = "/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/usr/games: usr/games: $ {JAVA_HOME}/bin" JAVA_HOME =/opt/java/jdk1.7.0 JRE_HOME =$ {JAVA_HOME}/jre

] ~]# Yum install JAVA-1.7.0-OPENJDKafter the installation is complete, the default installation directory is :/usr/lib/jvm/java-1.7.0-openjdk-1.7.0.75.x86_643. setting environment variables[Email protected] ~]# Vi/etc/profileAdd the following content:#set Java EnvironmentJava_home=/usr/lib/jvm/java-1.7.0-openjdk-1.7.0.75.x86_64Jre_home= $JAVA _home/jreClass_path=.: $JAVA _home/lib/dt.jar: $JAVA _home/lib/tools.jar: $JRE _home/libPath= $PATH: $JAVA _home/bin: $JRE _home/binExport Java_home jre_

Step 1: Download jdk-7-linux-i586.tar.gz [Plain] View plaincopy Http://download.oracle.com/otn-pub/java/jdk/7/jdk-7-linux-i586.tar.gz wget-c (Note: If the download fails, we recommend that you use thunder to download it and copy it to the Linux system .)Step 2: unzip and install [Plain] View plaincopy Sudo tar zxvf./jdk-7-linux-i586.tar.gz-C/usr/lib/jvm Cd/usr/lib/jvm Sudo mv jdk1.7.0/java-7-sun Step 3: Modify Environment Variables [Plain] View plaincopy Vim ~ /. Bashrc Add:[Plain]

Much has been said about how ungodly expensive Windows Vista is going to be, but what is it really worth? While software is rarely priced based on what it actually Does , I figured I 'd take a unique approach toward figuring out the real value of Vista, with a feature-by-feature analysis of how much the upgrades are worth to the user. are there other ways to get the same features? How Much Do alternatives cost? Here's my blow by blow Analysis of Vist

following lines to the file: Java_home = opt/jdk1.6.0 _ 07Classpath = $ java_home/lib :.Path = $ path: $ java_home/binExport java_home classpath path Save and exit. Run the following command: [Root @ localhost etc] source/etc/profile This allows the configuration to take effect without restarting the computer. 3) change the default JVMNow you need to run the alternatives command to instruct fedora to recognize Sun's JVM. [Root @ localhost

Plaincopy sudo update-alternatives--install/usr/bin/java Java/usr/lib/jvm/java-7-sun/bin/java 300 sudo update-alternatives--install/usr/bin/javac Javac/usr/lib/jvm/java-7-sun/bin/javac 300 sudo update-alternatives--install/usr/bin/jar Jar/usr/lib/jvm/java-7-sun/bin/jar 300 sudo update-alternatives