to clean all files what start with the shart sing # use this: sed -e '/^#/d' /path/file.txt > /tmp/output.txt than to delete blank lines use this command: sed '/^$/d' /tmp/output.txt > /tmp/output2.txt

http://www.student.northpark.edu/pemente/sed/sed1line.txt

how to clean certains line from a file?

to clean all files what start with the shart sing # use this: sed -e '/^#/d' /path/file.txt > /tmp/output.txt than to delete blank lines use this command: sed '/^$/d' /tmp/output.txt > /tmp/output2.txt 07.12.13

http://www.student.northpark.edu/pemente/sed/sed1line.txt

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