sed -i "/^abc/d" a.txt
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findstr /bv "abc" a.txt>temp
findstr .* temp>a.txt
del temp
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set fso=createobject("scripting.filesystemobject")
l=split(fso.opentextfile("a.txt",1).readall(),vbcrlf)
set t=fso.createtextfile("a.txt",true)
for each ll in l
if instr(ll,"abc")<>1 then
t.writeline ll
next
t.close
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findstr /v /b "abc" a.txt >a.txt.tmp
move /y a.txt.tmp a.txt
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