Operation and Maintenance
Linux Operation and Maintenance
Detailed explanation of how to use Linux alternatives command to replace the version of selected software
Detailed explanation of how to use Linux alternatives command to replace the version of selected software
The following editor will bring you an article on how to use the alternatives command of Linux to replace the selected software version. The editor thinks it’s pretty good, so I’ll share it with you now and give it as a reference. Let's follow the editor and take a look.
When I installed search engine Elasticsearch last week, I was asked to install a newer java version. I chose java 1.8.0 , after successfully installing java, use java -version and find that the version used is still 1.6.0.
Instructions:
install means installation
link is a symbolic link
name is the identifier
path is the path to the executable file
1: Let’s first look at the current java version
2: Use Linux alternatives command to install java 1.8.0
1. First use alternatives to view the current situation What java versions are there in the system?
alternatives --config java
2. Use the alternatives command to install java 1.8.0
alternatives --install /usr/bin/java java /usr/local/java/jre1.8.0_131/bin/java 4Explanation:
/usr/bin/java is the path of the java command, use which java to view, the corresponding parameter java corresponding parameter3. Use alternatives --config java to check whether the installation of java 1.8.0 is successful
3: Select the java version
alternatives --config The result seen by java is the same as the result of 2(3). Pay attention to the last sentence in English: Enter to keep theFour: Use java -version to view the selected version
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