how to paste a line instead of a string across many files

user_5919561 0
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I have 1000 files with txt format, I want to

I want to replace the first line of each file which is "PUT KEYWORDS HERE" with my keywords which is "XYZ LET DDMIN=0.0 SCFCRT=1.D-10"

any idea

bash
2 Answers

sed -i "/PUT KEYWORDS HERE/c\XYZ LET DDMIN=0.0 SCFCRT=1.D-10" path/to/file/*.txt

Admin1

Try this

#!/bin/bash

files=$(ls -lA ./path | grep -v "total" | awk {'print $NF'})

for file in ${files[*]}
do
    sed -i -e '1s/PUT KEYWORDS HERE/XYZ LET DDMIN=0.0 SCFCRT=1.D-10/' ./path/$file
done
user_38197380
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