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Permissions: $chmod777 Jdk-6u45-linux-x64.bin Perform installation: $sudo./jdk-6u33-linux-x64.bin $sudo ./jdk-6u33-linux-x64.bin3.3 Configuring the JDK Open environment variable file $sudo gedit/etc/enviroment Add the following environment variables to save and exit: 1 path=$PATH: $JAVA _home/bin2 classpath= ".: $JAVA _home/bin"3 java_home= "/usr/ Lib/jvm/jdk1.6.0_45 " Association JDK6 $sudoUpdate-

Install the JDK with CentOS today and find that when the installation is complete, enter the Java command to verify if the installation is successful.Usage:gij [OPTION] ... CLASS [ARGS] ...To invoke Class.main, orGij-jar [OPTION] ... Jarfile [ARGS] ...To execute a JAR fileTry ' gij--help ' for more information.Feel very strange, how to appear gij, in the online search error occurred because the Linux system is not the default point to the JDK version of the installation, so, to view the next[ema

-alternatives -- install/usr/bin/Java/usr/lib/JVM/jdk1.6.0 _ 38/bin/Java 300Sudo Update-alternatives -- install/usr/bin/javac/usr/lib/JVM/jdk1.6.0 _ 38/bin/javac 300Sudo Update-alternatives -- install/usr/bin/Jar/usr/lib/JVM/jdk1.6.0 _ 38/bin/jar 300 After the three commands are executed, resources on the Internet can be automatically switched to jdk1.6.0 _ 38, b

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]

=/usr/local/java/jdk1.7.0 _ 09PATH = $ PATH: $ HOME/bin: $ JAVA_HOME/binJRE_HOME =/usr/local/java/jre1.7.0 _ 09PATH = $ PATH: $ HOME/bin: $ JRE_HOME/binExport JAVA_HOMEExport JRE_HOMEExport PATH Save and close gedit, and then enter the following command: Sudo update-alternatives -- install "/usr/bin/java" "java" "/usr/local/java/jre1.7.0 _ 09/bin/java" 1Sudo update-alternatives -- install "/usr/bin/java

Configure JDK 1.8.0 _ 25 in Ubuntu 14.04 and switch the version. Configure jdk 1.8.0 _ 25 in Ubuntu 14.04. You can switch the version to jdk. Decompress: Sudo mkdir/usr/lib/jvm Sudo tar zxvf/home/user name/Downloads/jdk-8u25-linux-i586.tar.gz-C/usr/lib/jvm Modify the environment variable: // The environment variable is not configured after the test. After the configuration, the following command cannot be used to switch the version. Test method: Hadoop-2.6.0 with jdk1.8.25 compilation will be wr

the Alternatives command to install JAVA After the installation package is decompressed, you can use the alternatives command for installation. The alternatives command encapsulates chkconfig. cd /opt/jdk1.8.0_72/alternatives --install /usr/bin/java java /opt/jdk1.8.0_72/bin/java 2alternatives --config javaThere are 3

to the logon page and enter your username and password registered on the Oracle website. Step 3: Install Oracle JDK(1) create a java directory$ Sudo mkdir-p/usr/local/javaCopy the jdk-6u45-linux-x64.bin you downloaded to the/usr/local/java directory$ Cd/usr/local/java$ Sudo cp/home/bkjia/Downloads/jdk-6u45-linux-x64.bin. (2) decompress the binfile$ Sudo chmod + x jdk-6u45-linux-x64.bin$ Sudo./jdk-6u45-linux-x64.bin$ Sudo rm-rf jdk-6u45-linux-x64.bin Step 4: configure the JDK(1) Configure JAVA_H

-dev:i386 3. downgrade the gcc/g ++ version (the default gcc/g ++ version of Ubuntu is a little high) # sudo apt-get install gcc-4.4 # sudo apt-get install g++-4.4 #sudo update-alternatives –install /usr/bin/gcc gcc /usr/bin/gcc-4.4 40 #sudo update-alternatives –install /usr/bin/g++ g++ /usr/bin/g++-4.4 40 #sudo update-alternatives –install /usr/bin/gcc gcc /usr/

Install Oracle JDK 14.04 on Ubuntu 1.8 LTS (1) download JDK Http://www.oracle.com/technetwork/cn/java/javase/downloads/index.html (2) Extract (3) create a jvm File (4) Move to/usr/lib/jvm (Note: If there is no jvm file, running this statement will automatically create the jvm file, but it will only put all the files in jdk1.8.0 _ 25 into the jvm, instead of placing the jdk1.8.0 _ 25 and its files in the jvm file, the two are different) (5) set JDK Environment Variables (Also in ~ /. Bashrc

you have not logged on, the system will go to the logon page and enter your username and password registered on the Oracle website.Step 3: Install Oracle JDK(1) create the java directory $ sudo mkdir-p/usr/local/java copy the jdk-6u45-linux-x64.bin you downloaded to the/usr/local/java directory $ cd/usr/local/java $ sudo cp/ home/dennis/Downloads/jdk-6u45-linux-x64.bin.(2) unzip the binfile $ sudo chmod + x jdk-6u45-linux-x64.bin $ sudo./jdk-6u45-linux-x64.bin $ sudo rm-rf jdk-6u45-linux-x64.bi

Step 1: Download the JDK of tar.gz, Run the sudo tar zxvf./jdk's name.tar.gz-C and the path you want to specify. Step 2: Modify JDK Permissions Sudo chmod 766-r your JDK path Step 3: Press CTRL + ALT + T to open the terminal Step 4: Enter sudo gedit/etc/profile, the system will pop up the profile text file, and add the following code at the end # Set Java environmentExport java_home = Your JDK pathExport jre_home =$ {java_home}/JREExport classpath =. :$ {java_home}/lib: 4 {jre_home}/libExport pa

1. Check the version and installed version Dev03 @ dev03 :~ $ Ls/usr/bin/GCC * /Usr/bin/GCC/usr/bin/gcc-4.5/usr/bin/gcc-4.6 If some versions are missing, install them directly: Sudo apt-Get install gcc-4.5 g ++-4.5 Sudo apt-Get install gcc-4.4 g ++-4.4 2. view the G ++ GCC version. G ++-V gcc-V 3. When the environment requires a specific version of GCC g ++, select sudo update-alternatives --install /usr/bin/gcc gcc /usr/bin/gcc-4.5 40sudo update

CC and GCC in Linux Zhou yinhui In Linux, CC will be seen later, and GCC will be seen later, which is a bit messy. Are they the same thing? What is the difference? In two parts: First, if the scope of discussion is between UNIX and Linux, Then CC and GCC are not the same thing. CC from UNIXC LanguageCompiler, short for C compiler. GCC comes from the Linux world and is short for GNU Compiler Collection. Note that this is a set of compilers, not just C or C ++. Secondly, if t

Install JDK 1.6 in Ubuntu and set it as the default JDK. download the Liunx JDK in Windows, and I will download the jdk-6u43-linux-i586.bin2. upload JDK to Ubuntu3. manually install JDK through secureCRT (I installed JDK under/usr/local/bin/jdk1.6.0 _ 43): repair first... install JDK 1.6 in Ubuntu and set it to the default JDK 1. download the Liunx JDK in Windows, my jdk-6u43-linux-i586.bin2. upload JDK to Ubuntu3. manually install JDK through secureCRT (I installed under/usr/local/bin/jdk1.6.0

source/etc/profile for one time) Javac java = version confirmation // This setting applies to a single user Cd/home/{user's home directory} Vim. bashrc Add the following statement at the end of the bashrc file: Export JAVA_HOME =/usr/local/{jdk path} Export JRE_HOME =/usr/local/{jdk path}/jre Export PATH = $ JAVA_HOME/bin: $ JAVA_HOME/jre/bin: $ PATH Export CLASSPATH =.: $ JAVA_HOME/lib/tools. jar: $ JAVA_HOME/lib/dt. jar 2. install myeclipse Download the run file of myeclise for linux from the

1, first uninstall the server's own JDK package# java-version #查看服务器是否安装过jdkJava Version "1.6.0_17"OpenJDK Runtime Environment (IcedTea6 1.7.4) (rhel-1.21.b17.el6-i386)OpenJDK Client VM (build 14.0-b16, Mixed mode)# Rpm-qa |grep gcj #查看服务器安装的jdk软件包信息libgcj-4.4.4-13.el6.i686java-1.5.0-gcj-1.5.0.0-29.1.el6.i686# rpm-e java-1.5.0-gcj-1.5.0.0-29.1.el6.i686 #卸载软件包2, to the Sun's official website downloadHttp://www.oracle.com/technetwork/java/javase/downloads/jdk7-downloads-1880260.htmlSelect Accept L

After centos is installed, openjdk is used by default. We found that the image of the app verification code we developed is displayed incorrectly. We checked that the image interface is different from that of Sun JDK, we usually use Sun JDK for development in windows. Therefore, we must replace Sun JDK. Generally, we may need to delete open JDK. I checked it online and found a new method, use alternatives to convert the Java version. The specific meth

-0.b14.el6_7.x86_64/jre/lib/amd64/libjsoundalsa.so/usr/lib/jvm/java-1.8.0-openjdk-1.8.0.91-0.b14.el6_7.x86_64/jre/lib/amd64/libsplashscreen.so/usr/share/applications/java-1.8.0-openjdk-1.8.0.91-0.b14.el6_7.x86_64-policytool.desktop/usr/share/icons/hicolor/16x16/apps/java-1.8.0.png/usr/share/icons/hicolor/24x24/apps/java-1.8.0.png/usr/share/icons/hicolor/32x32/apps/java-1.8.0.png/usr/share/icons/hicolor/48x48/apps/java-1.8.0.png$ CD/USR/LIB/JVM$ llTotal Dosage 4lrwxrwxrwx. 1 root root 5 Month 16:

Ubuntu uses gcc of different versionsDifferent Versions of ubuntu have different gcc, such as ubuntu 10.04 default gcc version is gcc-4.4.1, ubuntu 10.10gcc default version is gcc-4.4.5.However, in actual use, we want to use other gcc compilers because of cross-compilation or other specific requirements. For example, if I want to use gcc-4.3 in ubuntu 10.10, what should I do?First open the new software manager, enter gcc in it, find the gcc-4.3 and g ++-4.3, and then select: Enter the following