Suppose you have the same utility in two different places in your filesystem, one installed by a package you don’t really need since you have just installed the same files from source (but in a different directory). You promptly uninstall the packaged version, but when you try to run the utility, you get something like this:
bash: /usr/bin/utility: No such file or directory
The shell is still looking to find the old version!
To refresh the memory of bash, just run the command:
and after that, when you rerun the utility, the new version will appear.
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