[gmx-users] erorr while using grep command

Tsjerk Wassenaar tsjerkw at gmail.com
Sun Apr 17 13:30:14 CEST 2011

Hi Sajad,

The error seems quite explicit. The input file to grep does not exist.
Are you in the right directory? Are you mixing op O and 0?

Also, please note that this has nothing to do with gromacs. This is
just your basic linux and this mailing list is the wrong place for
such questions. Furthermore, to omit TPO, you need to run grep -v
'TPO' 10L5.pdb > No-TPO.pdb

Hope it helps,


On Sun, Apr 17, 2011 at 12:09 PM, Sajad Ahrari <sajadahrari at yahoo.com> wrote:
> hello every one!
> I am trying to omit TPO(witch stands for phospho-tyrosine) from my pdb file
> by executing the command"grep TPO 10L5.pdb > TPO.pdb". but i am being facing
> with this erorr"grep: 10L5.pdb: No such file or directory" can any one help?
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Tsjerk A. Wassenaar, Ph.D.

post-doctoral researcher
Molecular Dynamics Group
* Groningen Institute for Biomolecular Research and Biotechnology
* Zernike Institute for Advanced Materials
University of Groningen
The Netherlands

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