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- # How about learning about whereis and which using whatis?
- ```bash
- $ whatis which
- which (1) - shows the full path of (shell) commands
- $ whatis whereis
- whereis (1) - locate the binary, source, and manual page files for a command
- Basically, whereis searches for "possibly useful" files, while which only searches for executables.
- ```
- I rarely use whereis. On the other hand, which is very useful, specially in scripts. which is the answer for the following question: Where does this command come from?
- ```bash
- $ which ls
- /bin/ls
- $ whereis ls
- ls: /bin/ls /usr/share/man/man1p/ls.1p.bz2 /usr/share/man/man1/ls.1.bz2
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