You can't delete lines from a file. You can copy a file while doing modifications to what is copied. So after opening the two files,

  1. While the source hasn't been exhausted,
    1. Read a line from the source.
    2. If line contains '1.0' or such a line was already found,
      1. Print the line to the destination.

As a one-liner: 

perl -ne"print if $f ||= /1\.0/" infile >outfile

[download]

or in-place: 

perl -i.bak -ne"print if $f ||= /1\.0/" file

[download]

Update: The above were for the Windows Command shell. Below are adaptations for bash: 

perl -ne'print if $f ||= /1\.0/' infile >outfile

[download]

or in-place: 

perl -i~ -ne'print if $f ||= /1\.0/' file

[download]

In reply to Re: Delete strings by ikegami
in thread Delete strings by sandy1028

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