I didn't see how hash can do it. About the check, I test if the first word after the first semicolon match another word in the same file. Example : 
S_FER_SCAM1_ARRESTO;ARRESTO;ST;0;ST;1;0;TS;0;0
S_FER_SCAM1_ARRESTO;ARRESTO;SU LI IR ST;0;SU LI IR ST;1;0;TS;0;0

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here S_FER_SCAM1_ARRESTO match

In reply to Re^2: How to check lines that start with the same word then delete one of them by agnes00
in thread How to check lines that start with the same word then delete one of them by agnes00

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