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  1. #!/bin/bash
  2. s="alpha
  3. beta
  4. gamma"
  5.  
  6. #awk -v ln=1 '{print ln++  " "  $0 }'  <<< "$s"
  7. sed -n 'x;/^$/ s/^.*$/1/;G;h;s/^/      /;s/^ *\(......\)\n/\1  /p;g;s/\n.*$//;/^9*$/ s/^/0/;s/.9*$/x&/;h;s/^.*x//;y/0123456789/1234567890/;x;s/x.*$//;G;s/\n//;h' <<< "$s"
Success #stdin #stdout 0s 19632KB
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     1  alpha
     2  beta
     3  gamma
https://ideone.com/YHC3Ze
language:
Bash (bash 5.0.3)
created:
7 years ago
visibility:
secret

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