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Editorial Team
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Asked: 2026-05-20T18:02:29+00:00

I have a file which has blank lines but the following sed command is

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I have a file which has blank lines but the following sed command is not working:

sed -e 's/#.*//' -e '/^END/ d' -e '/^>/ d' -e '/^$*/ d' auto.txt > a.txt

It works but when I add the blank line thing it removes everything and i get empty file

Sample

auto.txt

>#begin wildfire_pdm_x10
#wildfire_test server pdml x10 mode=PDM_MDHTASM clean_cache
proe_wfpdmo_wsabar_pdmactions+PDM_MDHTASM+wfpdmo_wsabar_pdmactions.txt@proe.wfpdmo_wsabar_pdmactions
END
#wildfire_test server pdml x10 mode=PDM_MDTTB clean_cache
proe_wfpdmo_wstbar_pdmactions+PDM_MDTTB+wfpdmo_wstbar_pdmactions.txt@proe.wfpdmo_wstbar_pdmactions
END

output needed

a.txt

proe_wfpdmo_wsabar_pdmactions+PDM_MDHTASM+wfpdmo_wsabar_pdmactions.txt@proe.wfpdmo_wsabar_pdmactions

proe_wfpdmo_wstbar_pdmactions+PDM_MDTTB+wfpdmo_wstbar_pdmactions.txt@proe.wfpdmo_wstbar_pdmactions
proe_wfpdmo_pdm_matfnc_b+PDM_MTLFNC+wfpdmo_pdm_matfnc_b.txt@proe.wfpdmo_pdm_matfnc_b
proe_wfpdmo_proe_resparam+PDM_PARM+wfpdmo_proe_resparam.txt@proe.wfpdmo_proe_resparam
proe_wfpdmo_proe_restrparam+PDM_PARM+wfpdmo_proe_restrparam.txt@proe.wfpdmo_proe_restrparam
proe_wfpdmo_proe_restrparam_b+PDM_PARM+wfpdmo_proe_restrparam_b.txt@proe.wfpdmo_proe_restrparam_b
proe_wfpdmo_proe_restrparam_b+PDM_PARM+wfpdmo_proe_restrparam_b_2.txt@proe.wfpdmo_proe_restrparam_b
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1 Answer

  1. Editorial Team

    you can use awk

    $ awk 'NF && !/^(>|END)/ && !/#.*/' file
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