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  1. #!/bin/bash
  2. s="<file-min-size>10830</file-min-size>
  3.       <rotate-log>true</rotate-log>
  4. <file-min-size>25600</file-min-size>
  5.       <rotate-log>true</rotate-log>
  6. <file-min-size>32300</file-min-size>
  7.       <rotate-log>true</rotate-log>
  8. <file-min-size>13456</file-min-size>
  9.       <rotate-log>true</rotate-log>"
  10.  
  11. sed '/<\/rotate-log>/{:A;n;s#</rotate-log># insertvalue</rotate-log>#;bA}' <<< "$s"
Success #stdin #stdout 0s 4308KB
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<file-min-size>10830</file-min-size>
      <rotate-log>true</rotate-log>
<file-min-size>25600</file-min-size>
      <rotate-log>true insertvalue</rotate-log>
<file-min-size>32300</file-min-size>
      <rotate-log>true insertvalue</rotate-log>
<file-min-size>13456</file-min-size>
      <rotate-log>true insertvalue</rotate-log>
https://ideone.com/222dxO
language:
Bash (bash 5.0.3)
created:
5 years ago
visibility:
public

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