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: $JAVA _home/bin
Source/etc/profile
Then install openjdk1.7, you can install it in Software Center, and then execute the following command after installat
Tags: ons file permissions maintenance Ali awt install Oracle ISP download systemDeepin System Manual Installation Oracle Jdk8 detailed tutorialsDownload the JDK archive from Oracle website and extract the files using sudo tar-zxf jdk***, which I placed under the HOME/DIY/JAVA/JDK path.JDK file path:/home/diy/java/jdk/jdk1.8.0_152JDK environment variable ConfigurationModifying a configuration filesudo vi/etc/profileAfter entering, knock on I, then you can edit the content.Add content at the end
1. Install NVIDIA Drive./nvidia-linux-x86_64-384.69.runNvidia-smi success indicates driver OK2. Installing CudaDpkg-i Cuda-repo-ubuntu1404-8-0-local-ga2_8.0.61-1_amd64.debApt-get UpdateApt-get Install CudaInstall PATCH2 (can also not be installed) Dpkg-i Cuda-repo-ubuntu1404-8-0-local-cublas-performance-update_8.0.61-1_amd64.deb3. Reduce the GCC version to less than 5.0 (ubuntu-14 not required because it is already gcc-4.8.4,ubuntu-16)sudo apt-get install g++-4.9sudo update-
,Then enter in the above type to search: Additional drivers Open "Additional drivers--additional Driver" and select the NVIDIA driver that matches your graphics card, and here I amUsing Nvidia binary drivers (375)Then choose Apply Changes, where the installation may fail, at which point you can continue to choose to apply the changes, install multiple timesWhen the installation is complete, select restart4. GCC down versionCUDA8.0 does not support GCC 5.0 and above compilers, and the system come
Ubuntu 14 Installation Jdk7: Official website Download: http://www.oracle.com/technetwork/java/javase/downloads/jdk7-downloads-1880260.htmlSelect Accept license and choose the JDK download that suits your model.1. unzip the downloaded JDK file: [email protected]:~$ lsWorkspace public template video picture document download music Desktop[Email protected]:~$ cd Download$ sudo mkdir/usr/lib/jvm$ sudo tar-zxvf jdk-7u55-linux-i586.tar.gz-c/USR/LIB/JVM2. Configure environment variables belowCommand
:OpenJDKSourceBundleldapjdk.x86_64:TheMozillaLDAPJavaSDK
2. Select a version to installWe install the 1.7 version here
1
[[emailprotected]~]#yuminstalljava-1.7.0-openjdk
After 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
1
[[emailprotected]~]#vi/etc/profile
Add the following content:
123456
#setjavaenvir
Phenomenon:---------------------------------[ERROR] Failure executing Javac, but could not parse the error:Javac:invalid Target release:1.8Usage:javac Use-help for a list of possible option---------------------------------The survey found that:[Email protected] ~]# java-versionOPENJDK Version "1.8.0_65"OpenJDK Runtime Environment (build 1.8.0_65-b17)OpenJDK 64-bit Server VM (build 25.65-b01, Mixed mode)[Email protected] ~]# javac-versionJavac 1.7.0_111that is, Java is inconsistent with the Javac
First, install the Java SE JKDA, download Http://www.oracle.com/technetwork/java/javase/downloads/index.html?ssSourceSiteId=ocomen Select the latest version, the current latest version 1.8.0. Download jdk-8u45-linux-x64.tar.gz.B, unzip the download package, add environment variables.$ sudo vim ~/.BASHRCAdd at the end of the documentExport Java_home=/home/jeremy/jdk1.8.0export jre_home=${java_home}/jre export classpath=.:${java_home}/lib:${ Jre_home}/lib export Path=${java_home}/bin: $PATH It
-cookie "" http://download.oracle.com/otn-pub/java/jdk/8u111-b14/ jdk-8u111-linux-i586.tar.gz "# tar Xzf jdk-8u111-linux-i586.tar.gzNote: If Above wget command does not work for your watch this example video to download Java source archive using terminal.Install Java with alternativesAfter extracting archive file with Alternatives command to install it. Alternatives command is available in the chkconfig pac
Compile the Android 4.4.2 source code
In the previous article, I shared with you the process of downloading the android 4.4.2 source code in the sky (see the whole process of downloading the android4.4.2 source code (with the downloaded source code). Now I will write down the compilation notes.
Installing the JDK
The master branch of Android in the Android Open Source Project (AOSP) requires Java 7. On Ubuntu, use OpenJDK.
Java 7: For the latest version of Android
$ sudo apt-get update$ sudo
Build a Python development environment in Ubuntu 13.10:
Step 1 install JDK (to install eclipse ide)
Decompress the installation package and set JDK.
The update-alternatives -- install option feature adds a new set of system command links.
Tar-zxvf jdk-7u45-linux-x64.tar.gzSudo mkdir-p/usr/lib/jvmSudo mv./jdk1.7.0 _ 45/usr/lib/jvm/jdk1.7.0Sudo update-alternatives -- install "/usr/bin/java" "java" "/usr/lib/j
Practical Android skills: Switch JDK under Ubuntu
After Android L, we recommend that you use JDK 7 to compile the program. This is a natural development rule, just like compiling Android 1.6 4 years ago and using JDK 5.
Multi-version JDK can coexist. You only need to use the update-alternatives tool to switch between them at any time. The following describes how to install openjdk and oracle jdk (cannot cope with sun) and switch the version.1. Install
at the end of the open file?
12345
# export Java env export java_home= /usr/local/java/jdk1 .7.0 export jre_home= /usr/local/java/jdk1 .7.0 /jre export classpath=.:%java_home% /lib/dt .jar:%java_home% /lib/tools .jar export path= $JAVA _home /bin : $JRE _home /bin : $PATH
Save the exit and enter the following command to make it effective?
1
source~/.bash_profile
4. Configure the default JDK (this step can be omitted
Finally, you can upgrade your system by implementing C ++ 11 GCC4.8.1. The following steps can be performed to install GCC4.8.1, sudoadd-apt-repositoryppa: ubuntu-toolchain-r/testsudoupdate-alternatives -- remove-allgccsudoupdate-alternatives -- remove
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,
Su
downloaded cannot be installed.
Original
Go to the directory where you downloadedthe JRE package, and change the permissions so the file is executable. Forexample:
$ CD/tmp
$ Chmod A + x jre-6u25-linux-x64-rpm.bin
Translation
Go to the JRE directory you downloaded and change the directory permissions so that they can be authorized to other users.
$ CD/tmp
$ Chmod A + x jre-6u25-linux-x64-rpm.bin
Original
Extract and run the RPM file. For example:
$ Sudo./jre-6u25-linux-x64-rpm.bin
The RPM IN
openjdk. To set the JDK we installed as the default JDK version, perform the following work.Run the Code:[Plain] View plaincopy
Sudo Update-alternatives -- install/usr/bin/Java/usr/lib/JVM/Java-7-sun/bin/Java 300
Sudo Update-alternatives -- install/usr/bin/javac/usr/lib/JVM/Java-7-sun/bin/javac 300
Sudo Update-alternatives -- install/usr/bin/Jar/usr/lib/JVM/
I encountered this error. I saw the solution in a Foreign Forum and successfully solved the problem. I hope to help others.
Error:Build/CORE/product_config.mk: 229: Warning: adding test OTA keyHost Java: clearsilver (Out/host/common/obj/java_libraries/Clearsilver_intermediates/classes)Unrecognized option: 9999999Make: *** [out/host/common/obj/java_libraries/Clearsilver_intermediates/javalib. jar] Error 41
Cause:According to the error message, it is probably a Java Virtual Machine problem. Some p
The content source of this page is from Internet, which doesn't represent Alibaba Cloud's opinion;
products and services mentioned on that page don't have any relationship with Alibaba Cloud. If the
content of the page makes you feel confusing, please write us an email, we will handle the problem
within 5 days after receiving your email.
If you find any instances of plagiarism from the community, please send an email to:
info-contact@alibabacloud.com
and provide relevant evidence. A staff member will contact you within 5 working days.