如何使用linux命令在文本文件中选择包含信息的行

Question

I just want to select certain info in separated rows in a text file. How do I deal with this? For selecting row, which contains "SUBSCRIBERIDENTIFIER" and another row contains "LATEST_OFFLINE_TIME"

My output to look like following:
SUBSCRIBERIDENTIFIER=23481XXXXXX02
LATEST_OFFLINE_TIME=20170330191209

Answer 1

$ awk '/'"SUBSCRIBERIDENTIFIER"'/,/'"LATEST_OFFLINE_TIME"'/' file.txt
SUBSCRIBERIDENTIFIER=1923UIO1U23I1O
LATEST_OFFLINE_TIME=128390812903810983019

Answer 2

$ awk '/SUBSCRIBERIDENTIFIER/,/LATEST_OFFLINE_TIME/' file.txt