如何根据给定的模式将linux中的文本文件从文件底部拆分到顶部

Question

How to split (it doesn't matter what command) a text file in Linux from the bottom of the file to the top based on a given pattern.

If I have the file:

111
aaa
222
aaa
333
aaa

The output should be

1st file
    333
    aaa

2nd file
    222
    aaa

3rd file
    111
    aaa

Thank you.

Answer 1

Reverse the file with tac and then run it through csplit . The -k option means that you don't need to know the number of splits in advance.

tac file | csplit -s -k - "/aaa/+1" "{99}"