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This article mainly shows you "how to use sed or awk to deal with the last line of a file", the content is easy to understand, clear, hope to help you solve your doubts, the following let the editor lead you to study and learn "how to use sed or awk to deal with the last line of a file" this article.

There is the following text:

Abcd 1234 fds

2011 550

1023 832er 1231

After the request is processed, it is as follows:

Abcd 1234 fds

2011 550

Total1:1023 total2:832er 12end

It is judged that if it is the last line of the text, add the second column total1:, and the third column total2:, before the first column, subtract the next two characters and add end.

It is realized by sed and awk respectively.

Sed:

The code is as follows:

Echo 'abcd 1234 fds

2011 550

1023 832er 1231' | sed-r'$s / ([^] *) () ([^] *) () (..). * $/ total1:\ 1\ 2total:\ 3\ 4\ 5endbelt'

Abcd 1234 fds

2011 550

Total1:1023 total:832er 12end

Awk:

The code is as follows:

Awk'NR > 1 {print a} {adept0} END {$1 = "total1:" $1th gensub 2 = "total2:" $2X end gensub (/.. $/, "print", $0)} 'file

Awk 'BEGIN {getline a} {print a} {print astata 0} END {$1 = "total1:" $1x * * 2 = "total2:" $2 * $/, "end", 1); print}'

Awk'{if (! getline line) {print "total1:" $1 "total2:" $2 "" gensub (/.. $/, "end")} else {print line?$0 RS line:$0}}'

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