The whereis command allow us to find where a binary it is stored. For example, to find the java binaries:
whereis java
Output:
java: /usr/bin/java /usr/include/java /usr/share/java /usr/lib/jvm/java-11-openjdk/bin/java
type
type command shows which command the shell executes:
type java
Output:
java is /usr/bin/java
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