update-alternatives creates, removes, maintains and displays information about the symbolic links comprising the Debian alternatives system. It is possible for several programs fulfilling the same or similar functions to be installed on a single sys‐ tem at the same time.
What is update-alternatives — Install?
When each package providing a file with a particular functionality is installed, changed or removed, alternatives is called to update information about that file in the alternatives system. alternatives is usually called from the %post or %pre scripts in RPM packages.
How do I get rid of update-alternatives?
1 Answer. Do sudo update-alternatives –remove-all gccc .
What does update alternative format mean?
When each package providing a file with a particular functionality is installed, changed or removed, update-alternatives is called to update information about that file in the alternatives system. update-alternatives is usually called from the postinst (configure) or prerm (install) scripts in Debian packages.
How do I update my alternatives?
Assuming one has installed a JDK in /opt/java/jdk1.8.0_144 then:
- Install the alternative for javac $ sudo update-alternatives –install /usr/bin/javac javac /opt/java/jdk1.8.0_144/bin/javac 1.
- Check / update the alternatives config: $ sudo update-alternatives –config javac.
How do I install Update-alternatives in Linux?
To provide alternatives on your system, follow these steps:
- Copy your scripts into the /usr/local/bin directory.
- Make the scripts executable: tux > sudo chmod +x /usr/local/bin/foo-{2,3}
- Run update-alternatives for both scripts: …
- Check the master link:
What is Update-alternatives command?
update-alternatives creates, removes, maintains and displays information about the symbolic links comprising the Debian alternatives system. It is possible for several programs fulfilling the same or similar functions to be installed on a single sys‐ tem at the same time.
What is priority in Update-alternatives?
From man update-alternatives : Each alternative has a priority associated with it. When a link group is in automatic mode, the alternatives pointed to by members of the group will be those which have the highest priority. It can be any integer, even negative (see example in manpage).
What is ETC alternatives in Linux?
/etc/alternatives is a directory that is used in keeping track of the alternatives currently in use, by a tool called update-alternatives .
How do I install alternatives to Ubuntu?
How To Install And Switch Between Alternative Java Versions
- Check whether your Ubuntu is 32-bit or 64-bit file /sbin/init.
- Use the following command to extract the downloaded file sudo tar -xvf <your file name>.tar.gz.
- Step 5. Open /etc/profile file. …
- Now reload the environment . / etc/profile.
What is the command in Linux?
Common Linux Commands
| Command | Description |
|---|---|
| ls [options] | List directory contents. |
| man [command] | Display the help information for the specified command. |
| mkdir [options] directory | Create a new directory. |
| mv [options] source destination | Rename or move file(s) or directories. |
How do I switch PIP to pip3?
Solution 1. If your pip is pointing to pip2 , locate where is the pip “binary”. So just change the shebang from #!/usr/bin/python2 to #!/usr/bin/python3 . Now pip is pointing to pip3 .
How do I change Java alternatives in Linux?
B. 6. Setting the default JDK with the alternatives Utility
- Become the root user. The alternatives utility needs to be run with root privileges. …
- Set java . Run the following command: /usr/sbin/alternatives –config java. …
- Set javac . Enter this command: /usr/sbin/alternatives –config javac. …
- Extra Step: Set java_sdk_1.