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I need to upgrade Gradle in my Linux Mint box. After installing the latest version, I changed the symbolic link with a command something like 

ln -s /usr/bin/gradle /alternatives/bin/gradle
ln -s /alternatives/bin/gradle /usr/lib/gradle/6.1/bin

That change didn't alter the link at all. Then, I remember that I need to use 

update-alternatives --config

to modify the link. After the change, I can't see the gradle path with

which gradle

What I shall do to resolve the problem with the following information? 

abc@linux-mint ~ $ find -L /usr/bin -mindepth 15
find: ‘/usr/bin/gradle’: Too many levels of symbolic links
find: File system loop detected; ‘/usr/bin/X11’ is part of the same file system loop as ‘/usr/bin’.

And 

oem@oem-270s ~ $ ls -l /usr/lib/gradle/6.1/bin
total 4
lrwxrwxrwx 1 root root   24 Jan 30 15:05 gradle -> /etc/alternatives/gradle
-rwxr-xr-x 1 root root 2932 Jan 31  1980 gradle.bat
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    What is the output of ls -l /usr/lib/gradle/6.1/bin? It is likely that you have created a loop.
    – icarus
    Feb 3, 2020 at 20:06
  • @icarus You likely is correct. I might mistype a command to get a cycle link. I add the output to my post.
    – vic
    Feb 3, 2020 at 22:21
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    xkcd.com/981
    – user1133275
    Feb 3, 2020 at 22:33
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    So you have /usr/lib/gradle/6.1/bin/gradle which is a link to /etc/alternatives/gradle which is a link to /usr/bin/gradle which is probably a link to /etc/alternatives/gradle which is a link to /usr/bin/gradle which is probably a link to ... I think you got the two filenames to the ln command the wrong way around. I suggest reinstalling the latest gradle and then ln -s /usr/lib/gradle/6.1/bin/gradle /etc/alternatives/gradle
    – icarus
    Feb 4, 2020 at 0:04
  • I have reinstalled the latest version of Gradle and the situation hasn't changed. I believe that I shouldn't use ln, which is the cause in the first place, but update-alternatives. I, however, don't know how to reconstruct the links.
    – vic
    Feb 4, 2020 at 18:18

1 Answer 1

Reset to default
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I solved this problem by removing all versions of Gradle installments and reinstalled the 6.1 version.

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