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RHEL 7 system. I have an output file that looks like

eDTG=20210210-1540
Sent     74004956
Completed     72185529 (97.54%)
Lost     18119427 (2.46%)
QPS, SERVFAIL QPS     60122 2905
eDTG=20210210-1601

I've been using sed to change the spacing to tabs for saving as a csv. Now it turns out we need to break the QPS line to 2 separate lines to look like this (note the numbers split between the lines)

eDTG=20210210-1540
Sent     74004956
Completed     72185529 (97.54%)
Lost     18119427 (2.46%)
QPS     60122
SERVFAIL QPS     2905    
eDTG=20210210-1601

I can do this with

awk '/QPS/ {printf "QPS\t%s\nSERVFAIL QPS\t%s",$4,$5}' output.txt

But gawk -i inplace is not available so i have the issue with writing to another file. Well of course it only printed the matched line if i didn't put in the ; {print} option. And then it writes the old line as well. I know there has to be a better way to do this than creating the second file and then copying it back to the first filename (cutting the QPS, ...). I would appreciate any help you can give.

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    gawk -i inplace also use temporary file for the inplace job and sed -i as well – αғsнιη Feb 11 at 20:27
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    awk '/^QPS,/ {printf "QPS\t%s\nSERVFAIL QPS\t%s\n",$4,$5;next} 1' output.txt > output.txt.1 && mv output.txt.1 output.txt – Uncle Billy Feb 11 at 20:30
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sed could help you more.

sed -E -i 's/^QPS,[[:space:]]+SERVFAIL QPS[[:space:]]+([[:digit:]]+)[[:space:]]([[:digit:]]+$)/QPS\t \1\nSERVFAIL QPS\t \2/' file.txt

the -i flags make the sobstitution in place.

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  • Your substitution is not tab separated as OP needs. – schrodigerscatcuriosity Feb 11 at 23:38
  • gnu-sed says: Space characters: in the ‘C’ locale, this is tab, newline, vertical tab, form feed, carriage return, and space. – YetAnotherUser Feb 11 at 23:46
  • The substitution is not a regular expresion. – schrodigerscatcuriosity Feb 11 at 23:50
  • Yes ur right. I've edited – YetAnotherUser Feb 11 at 23:55
  • As pointed out in a comment under the question, the -i option does indeed use a temporary file, which OP doesn't seem to like. However, it is unlikely that there is a tool that can perform this task without temporary storage. – berndbausch Feb 12 at 0:02

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