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  1. #!/bin/bash
  2. awk '$1 ~ /^[^A-Z]/ { $1 = $4 }1'
  3.  
Success #stdin #stdout 0s 4372KB
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stdin 
ID                Name          Gender        NID
Y12               Jim              M          C12
Y23               David            M          C23
234               Bob              M          C22
2b1               Lucy             F          C24
2bb               Lily             F          C25
stdout 
ID                Name          Gender        NID
Y12               Jim              M          C12
Y23               David            M          C23
C22 Bob M C22
C24 Lucy F C24
C25 Lily F C25
https://ideone.com/lo3AV0
language:
Bash (bash 5.0.3)
created:
4 years ago
visibility:
secret

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