hackerrank alternatives

In Ubuntu, if you have more than one Java version installed (sometimes some software installs itself), how can you easily switch? In addition to the common settings environment variables, today learned a new way to switch:Update-alternatives--config JavaUpdate-alternatives--config JavacAlso, how to install your own Java version:sudo update-alternatives--install/u

When you install Debian Linux, the installation process may also provide you with multiple Python versions available, so there will be multiple Python executable binaries in the system. You can use the LS command to see that Python binaries are available in your system as follows. $ ls/usr/bin/python* /usr/bin/python /usr/bin/python2 /usr/bin/python2.7 /usr/bin/python3 / usr/bin/python3.4 /usr/bin/python3.4m /usr/bin/python3m Perform the following command to view the default Python vers

If there is more than one Java version installed (sometimes some software installed itself), how to easily switch it. In addition to the common settings environment variables, today learned a new way to switch:Update-alternatives--config JavaUpdate-alternatives--config JavacAlso, how to install your own Java version:sudo update-alternatives--install/usr/bin/java

kinds of links: Hard link (hard link) and soft link (also known as symbolic link, that is, soft link or symbolic link). Links for Linux systems to solve the shared use of files, but also brings the hidden file path, increase the security of permissions and save storage, and other benefits. If an inode number corresponds to multiple file names, these files are referred to as hard links. In other words, a hard link is one file that uses multiple aliases (the following figure hard link is an alias

You can use the LS command to see that Python binaries are available in your system as follows. $ ls/usr/bin/python* /usr/bin/python/usr/bin/python2/usr/bin/python2.7/usr/bin/python3/usr/bin/python3.4/ usr/bin/python3.4m/usr/bin/python3m Perform the following command to view the default Python version information: $ python--version python 2.7.8 1. Modify Python version based on User: To modify the Python version for a particular user, simply create an alias (alias) und

Tags: des style http color java using OS StrongRecently need to do JSP project, deployed in Ubuntu, the weekend time to configure the Nginx + PHP + mysql + phpmyadmin + tomcat environment, from the Windows C # turn around, how much some do not adapt, estimated to go the whole stack direction. By the way, the introduction of the configuration method, complete under the console. 1.1 Common Start Terminal Ctrl+alt+t Using the root user Sudo–sh View process

Programmer recruitment-strength is everythingGuideThe admission of Wall Street programmers will not simply focus on the high degree of graduation students. It focuses on personal strength. Excellent programmers are generally self-taught, and many of them may be college students. The world's banking industry needs 0.5 million of technical staff, as the number of employees reduced needs to replace 10% each year. JP Morgan has 40 thousand technicians who need to hire thousands of people each year t

interesting thing about the Hackerrank site is that the challenges they offer are highly correlated with AI technology--not only a cool development direction, but also a good platform for high-ranking programmers. The Hackerrank website has the combinator of Y and Svangel and other companies as sponsors. In a word, friends who have confidence in their personal level must not be missed.Codewars obviously fo

The process of compiling Android source code refer to the Android website:1, download the Android source code step: https://source.android.com/source/downloading.html2, compile the Android source code step: https://source.android.com/source/building-running.htmlHere are some of the problems I have encountered:1. JDK-related error when Compile Android Source:Error 1:target release 1.5 conflicts with default source release 1.7 Workaround: Best use JDK for 1.6.0.45 version error 2:[ Out/target/com

environment variables, not to list them one by one)Ubuntu may have a default JDK, such as openjdk. If openjdk is available, we need to perform the following work to make JDK installed by default. 3. Configure JDK software: Code:Sudo Update-alternatives -- install/usr/bin/javac/usr/local/jdk1.6.0 _ 31/bin/javac 1071Sudo Update-alternatives -- install/usr/bin/Java/usr/local/jdk1.6.0 _ 31/bin/Java 1071Update-

of sun? Google found that the original RedHat is far less troublesome than the win system. There is an alternative system (Alternatives System) mechanism in RedHat to abstract the locations and trademarks of different software or different versions of the same software, so as to eliminate the need to replace the environment. Update-alternatives is the implementation of this mechanism. Therefore, you can us

Finally, the complete implementation of C ++ 11 GCC 4.8.1. Upgrade your system. The following steps install gcc4.8.1 with content from: http://askubuntu.com/questions/312620/how-do-i-install-gcc-4-8-1-on-ubuntu-13-04 First install a software apt-get install python-software-properties Then sudo add-apt-repository ppa:ubuntu-toolchain-r/testsudo apt-get updatesudo update-alternatives --remove-all gcc sudo update-al