Using grep number as variable is not working

Asked Aug 29 '22 at 16:03

Active Aug 29 '22 at 16:03

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I want to grep a number of file in the current directory on linux.

E = $( grep -F "TOTEN" OUTCAR | tail -1 | awk '{printf "%12.9f \n",$5}')

When I run the script, it keeps telling me the command is not found. I tried many ways to solve it by searching online but it did't work.

asked Aug 29 '22 at 16:03

MathJacky

Remove spaces around `=` first – dimich Aug 29 '22 at 16:09
`grep | awk` is an anti-pattern. Instead of `grep -F "TOTEN" OUTCAR | tail -1 | awk '{printf "%12.9f \n",$5}'`, just write `awk '/TOTEN/{k=sprintf("%12.9f",$5)} END{print k}' OUTCAR` – William Pursell Aug 29 '22 at 17:13

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