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

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

CodePudding user response：

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

CodePudding user response：

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