Where are the rm, mkdir, tar, and the normal Unix command in the cygwin bash shell?!!!

[Manal Helal]

Hi

Can anyone help me with the installation of thr full utilities of cygwin. I

1. downloaded the setup.exe
2. Choose to install by downloading from the internet
3. and choose all modules to be installed in the curr package

in one installation I get all the unix command available, and in the 
second installation, I don't get rm, mkdire, and tar, and other unix 
commands running  ?!

How can I fix this problem,

Thanks in advance

Manal


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