alias command not effective

[Thomas Wiedmann]

Hello,

After defining an alias, e. g.

  alias laf='ls -la' | grep -v "^d"

the subsequent attempt to use this alias an error message appeared:

laf
bash:: laf: command not found

although the previous alias definition was accpeted without an error 
message.

What may be the reason, that the use of an alias, defined, had not been 
accepted?
What has to be done to resolve this problem?

Thomas Wiedmann 



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