whereis and which linux commands

 whereis command will locate source files and binaries,


To locate a binary file or if you have two version of a binary file installed ,you can find "which" one is currently used with this command.

Can we use which command to search for a file on a given directory? No,we can't. "which" searches only pre-defined directories shown by echo $PATH.

so in order to search a file on any directory,

find ~ -name "linux.txt"

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