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Top Forums UNIX for Dummies Questions & Answers how to print out consecutive two line from a text file Post 302540187 by Ygor on Wednesday 20th of July 2011 01:39:54 AM
Old 07-20-2011
Try...
Code:
awk '{a[NR]=$0}END{for(i=1;i<NR;i++)if(a[i]&&a[i+1]&&!a[i-1]&&!a[i+2])print a[i] ORS a[i+1] ORS}' file1

 

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END(7)							  PostgreSQL 9.2.7 Documentation						    END(7)

NAME
END - commit the current transaction SYNOPSIS
END [ WORK | TRANSACTION ] DESCRIPTION
END commits the current transaction. All changes made by the transaction become visible to others and are guaranteed to be durable if a crash occurs. This command is a PostgreSQL extension that is equivalent to COMMIT(7). PARAMETERS
WORK, TRANSACTION Optional key words. They have no effect. NOTES
Use ROLLBACK(7) to abort a transaction. Issuing END when not inside a transaction does no harm, but it will provoke a warning message. EXAMPLES
To commit the current transaction and make all changes permanent: END; COMPATIBILITY
END is a PostgreSQL extension that provides functionality equivalent to COMMIT(7), which is specified in the SQL standard. SEE ALSO
BEGIN(7), COMMIT(7), ROLLBACK(7) PostgreSQL 9.2.7 2014-02-17 END(7)
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