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For this kind of tasks, you may have to consider what to do if the search pattern occurs again before the offset.

awk -v offset=60 ' /two/ {x[NR + offset]} NR in x {delete x[NR]; $0 = "replaced"} {print}' 

Would make sure a line is replaced whenever the line 60 rows above contained two.

For this kind of tasks, you may have to consider what to do if the search pattern occurs again before the offset.

awk -v offset=60 ' /two/ {x[NR + offset]} NR in x {delete x[NR]; $0 = "MODIFIED"} {print}' 

Would make sure a line is replaced whenever the line 60 rows above contained two.

For this kind of tasks, you may have to consider what to do if the search pattern occurs again before the offset.

awk -v offset=60 '/two/ {x[NR+offset]}; NR in x {delete x[NR]; $0 = "replaced"} 1' 

Would make sure a line is replaced whenever the line 60 rows above contained two.

For this kind of tasks, you may have to consider what to do if the search pattern occurs again before the offset.

awk -v offset=60 ' /two/ {x[NR + offset]} NR in x {delete x[NR]; $0 = "replaced"} {print}' 

Would make sure a line is replaced whenever the line 60 rows above contained two.

For this kind of tasks, you may have to consider what to do if the search pattern occurs again before the offset.

awk -v offset=60 '/two/ {x[NR+offset]}; NR in x {delete x[NR]; $0 = "replaced"}' 

Would make sure a line is replaced whenever the line 60 rows above contained two.

For this kind of tasks, you may have to consider what to do if the search pattern occurs again before the offset.

awk -v offset=60 '/two/ {x[NR+offset]}; NR in x {delete x[NR]; $0 = "replaced"} 1' 

Would make sure a line is replaced whenever the line 60 rows above contained two.