Delete multiple lines between blank lines containing two patterns


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# 1  
Delete multiple lines between blank lines containing two patterns

Hi all,

I'm looking for a way (sed or awk) to delete multiple lines between blank lines containing two patterns ex:

Code:
user: alpha
parameter_1 = 15
parameter_2 = 1
parameter_3 = 0

user: alpha
parameter_1 = 15
parameter_2 = 1
parameter_3 = 0

user: alpha
parameter_1 = 16
parameter_2 = 0
parameter_3 = 1

user: beta
parameter_1 = 15
parameter_2 = 1
parameter_3 = 0

.

I want to delete the paragraph containing the same user and the same parameter_1, in the exemple: user=alpha and parameter_1=15 . The expected result should be:
Code:
user: alpha
parameter_1 = 15
parameter_2 = 1
parameter_3 = 0

user: alpha
parameter_1 = 16
parameter_2 = 0
parameter_3 = 1

user: beta
parameter_1 = 15
parameter_2 = 1
parameter_3 = 0

.

# 2  
Do you want to delete duplicate "records"?
If so:
Code:
awk '!a[$0]++' RS= myFile

# 3  
Use this if differences in parameter_2 and parameter_3 are to be ignored:
Code:
awk '!a[$1,$2]++' FS="\n" RS= ORS="\n\n" file

# 4  
Quote:
Originally Posted by RudiC
Use this if differences in parameter_2 and parameter_3 are to be ignored:
Code:
awk '!a[$1,$2]++' FS="\n" RS= ORS="\n\n" file

Exactly what i was looking for.

Thanks for all the solutions
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