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  1. #!/bin/bash
  2. s='Blah-1233455
  3. Affx-74537382
  4. Some line here
  5. Affx-4374575
  6. End of text 123456778.'
  7.  
  8. sed -E 's/^Affx(-[0-9]+)/rs\1/' <<< "$s"
Success #stdin #stdout 0.01s 5444KB
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stdin
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Standard input is empty
stdout
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Blah-1233455
rs-74537382
Some line here
rs-4374575
End of text 123456778.
https://ideone.com/tkeYlk
language:
Bash (bash 5.0.3)
created:
3 years ago
visibility:
secret

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