CODEWITHSUNDEEP
shellcommand
GHC
GHC

Reputation: 3

Is there a better way to run a repeat command in terminal?

I need to run a repeat command with the different filename to get the header. However, I need to run each file.

dfits *.fit | grep MSBTITLE

Is there any command I can run several files and show the filename and the header I need?

Upvotes: 0

Views: 42

Answers (1)

user1934428
user1934428

Reputation: 22225

grep does not know the filename, so you see only the matching lines, but not which file they come from originally. I would in your case write an explicit loop:

for file in *.fit
do
  if titleline=$(dfits $file|grep MSBTITLE)
  then
    echo $file : $titleline 
  fi
done

Since dfits already obscures the file name in its output, we store the output from grep into a variable, and if there is a match, output this line together with the file name.

Upvotes: 1

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