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
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
Ubuntu14.04 install JDK and ubuntu14.04jdk
Download from Sun's official website
Http://www.oracle.com/technetwork/java/javase/downloads/jdk7-downloads-1880260.html
Select accept license, and then select JDK download suitable for your model.
Decompress the file and modify the file name.
sudo mkdir /usr/lib/jvmsudo tar zxvf jdk-8u11-linux-i586.tar.gz -C /usr/lib/jvmcd /usr/lib/jvmsudomv jdk1.8.0_11 java
Add Environment Variables
sudo vim ~/.bashrc
Add the following content
export JAVA_HOME=/usr/li
original link: http://blog.csdn.net/yuxiangyunei/article/details/45365235Environment:Ubuntu:ubuntu-15.04-desktop-amd64vmware:vmware-workstation-full-11.1.0-2496824,1f04z-6d111-7z029-av0q4-3aeh8android:andro Id-5.1.0_r3One, Initializing a Build environmentOpen Terminal to enter the following command, open by: Ctrl+alt+tYou can also open the terminal by right-clicking the desktop. 1.Installing the JDK
$ sudo apt-get update
$ sudo apt-get install OPENJDK-7-JDKThe following has not been
Finally, the complete implementation of C ++ 11 GCC 4.8.1.
Upgrade your system.
The following steps can be performed to install GCC 4.8.1 in Ubuntu 13.04,
Sudo add-apt-repository ppa: ubuntu-toolchain-r/testSudo update-alternatives -- remove-all gccSudo update-alternatives -- remove-all g ++Sudo apt-get install gcc-4.8Sudo apt-get install g ++-4.8Sudo update-alternative
, add the following at the endExport Java_home=/usr/lib/jvm/java7Export JRE_HOME=${JAVA_HOME}/JREExport Classpath=.:${java_home}/lib:${jre_home}/libExport Path=${java_home}/bin: $PATH# Source/etc/profile #使配置文件立即生效Since there may be a default version of the JDK in the system, the following work will be done to set up our installed JDK as the default JDK version.Update-alternatives--install/usr/bin/java Java/usr/lib/jvm/java7/bin/java 300Update-
variables# Cp/etc/profile/etc/profile.bak #备份# Vi/etc/profile #编辑, add the following at the endExport Java_home=/usr/lib/jvm/java7Export JRE_HOME=${JAVA_HOME}/JREExport Classpath=.:${java_home}/lib:${jre_home}/libExport Path=${java_home}/bin: $PATH# Source/etc/profile #使配置文件立即生效Since there may be a default version of the JDK in the system, the following work will be done to set up our installed JDK as the default JDK version.Update-alternatives--inst
Moving Hadoop the next day. Construction Hadoop The environment also took two days to write the process of its own configuration here, I hope to help!I will use the text of all the resources are shared here, click to download, do not need to find a!There is a book on the inside of Hadoop technology. The first chapter describes the configuration process, but not specific ~---------------Installing the JDK-------------------------------1.Download jdk1.6.0_452. Unzip to opt directory and configure/
1. New JVM folder-Unzip# mkdir /usr/lib/JVM# tar2, set the environment variables, the last side of the/etc/profile file added:# vi /etc/profileexport java_home=/usr/lib/jvm/jdk1. 7 . 0_79export jre_home=${java_home}/jreexport CLASSPATH=.:${java_home}/lib:${jre_home}/ Libexport PATH=${java_home}/bin: $PATH3. Modify the system default JDK# update-alternatives--install /usr/bin/java java/usr/lib/jvm/jdk1. 7 - # Update-
installation of ECLIPSE-CDT failed.Start gnome-do,win+6. Chinese Input method,Apt-get Install IBUs ibus-clutter ibus-gtk ibus-gtk3 ibus-qt4Apt-get Install Ibus-googlepinyinThen set the IBUs frame7. After the installation is finished, you need to start ATD and CronUse Chkconfig to start some problems, but you can use it to display servicesUPDATE-RC.D cron defaults or specify sequence numberUPDATE-RC.D Cron Defaults 50 508 configuration can be compiled for Android Javajava_home=/usr/lib/jvm/jdk1.
From:http://www.cnblogs.com/plinx/archive/2013/06/01/3113106.html1, to the Sun's official website downloadhttp://www.oracle.com/technetwork/java/javase/downloads/jdk7-downloads-1880260.html Select Accept License and select the JDK download that fits your model.2, unzip the file, modify the filenamemkdir/usr/lib/tar zxvf jdk-7u21-linux-i586. Tar.gz-c/usr/lib/jvm$ cd/usr/lib/mv Jdk1. 7.0_21 java 3. Add Environment variablessudo vim ~/.BASHRCAdd the following:Export java_home=/usr/lib/jvm/JAVA
Installing the JDK ;java-version--View Versioncd/usr/local/src--Enter the directory of the installation packageTar zxvf jdk-7u79-linux-x64.tar.gz--decompression jdk;Mkdir-p/usr/lib/jvm--New Folder JVMMV jdk1.7.0_79/usr/lib/jvm/java7--Move the JDK unpacking package to the Java7 folder (Java is easy to name when moving)cp/etc/profile/etc/profile.bak--Backup to avoid a change in recoveryVi/etc/profile #编辑, add the following at the end of the save--:wq!Export java_home=/usr/lib/jvm/java7--Configurin
version of the JDK in the system, in order to set our installed JDK as the default version, do the followingUpdate-alternatives--install/usr/bin/java Java/usr/lib/jvm/java8/bin/java 300Update-alternatives--install/usr/bin/javac Javac/usr/lib/jvm/java8/bin/javac 300Update-alternatives--install/usr/bin/jar Jar/usr/lib/jvm/java8/bin/jar 300Update-
,Ten "Src/chrome_frame/tools/test/reference_build/chrome_win": None,"Src/chrome/tools/test/reference_build/chrome_mac": None,"Src/third_party/hunspell_dictionaries": None,13},"Safesync_url": "",15},16]Cache_dir = NoneTarget_os = [' Android ']4, Code synchronization:Performing glient Sync--force synchronization generally takes longer,Special Note:Please use a VPN gate that I use for an open source VPN Client (window platform) + ubuntu14.04 virtual machine.5. Installing the Java SDKsudo apt-get in
,Ten "Src/chrome_frame/tools/test/reference_build/chrome_win": None,"Src/chrome/tools/test/reference_build/chrome_mac": None,"Src/third_party/hunspell_dictionaries": None,13},"Safesync_url": "",15},16]Cache_dir = NoneTarget_os = [' Android ']4, Code synchronization:Performing glient Sync--force synchronization generally takes longer,Special Note:Please use a VPN gate that I use for an open source VPN Client (window platform) + ubuntu14.04 virtual machine.5. Installing the Java SDKsudo apt-get in
root, open up/etc/profile.
type/copy/paste: sudo gedit/etc/profile
Or
type/copy/paste: sudo nano/etc/profile
9 Scroll down to the end of thefile using your arrow keys and add the following lines below to the end of YOUR/ETC/PR Ofile File:
Type/copy/paste:java_home=/usr/local/java/jdk1.8.0_20jre_home=/usr/local/java/jre1.8.0_20Path= $PATH: $JRE _home/bin: $JAVA _home/binExport Java_homeExport Jre_homeExport PATH
Save the/etc/profile file and exi
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