sorting group of lines
- by benjamin button
I have a text file like below
iv_destination_code_10
TAP310_mapping_RATERUSG_iv_destination_code_10
RATERUSG.iv_destination_code_10 = WORK.maf_feature_info[53,6]
iv_destination_code_2
TAP310_mapping_RATERUSG_iv_destination_code_2
RATERUSG.iv_destination_code_2 = WORK.maf_feature_info[1,6]
iv_destination_code_3
TAP310_mapping_RATERUSG_iv_destination_code_3
RATERUSG.iv_destination_code_3 = WORK.maf_feature_info[7,6]
iv_destination_code_4
TAP310_mapping_RATERUSG_iv_destination_code_4
RATERUSG.iv_destination_code_4 = WORK.maf_feature_info[13,6]
iv_destination_code_5
TAP310_mapping_RATERUSG_iv_destination_code_5
RATERUSG.iv_destination_code_5 = WORK.maf_feature_info[19,6]
iv_destination_code_6
TAP310_mapping_RATERUSG_iv_destination_code_6
RATERUSG.iv_destination_code_6 = WORK.maf_feature_info[29,6]
iv_destination_code_7
TAP310_mapping_RATERUSG_iv_destination_code_7
RATERUSG.iv_destination_code_7 = WORK.maf_feature_info[35,6]
iv_destination_code_8
TAP310_mapping_RATERUSG_iv_destination_code_8
RATERUSG.iv_destination_code_8 = WORK.maf_feature_info[41,6]
iv_destination_code_9
TAP310_mapping_RATERUSG_iv_destination_code_9
RATERUSG.iv_destination_code_9 = WORK.maf_feature_info[47,6]
combination of three lines form a unit:
iv_destination_code_9
TAP310_mapping_RATERUSG_iv_destination_code_9
RATERUSG.iv_destination_code_9 = WORK.maf_feature_info[47,6]
is one unit.
iv_destination_code_9
9 indicates the number by which i have to sort
10
9
8....
i need a shell script/awk which will sort the units in a descending order.
how is it possible?