linux - grep如何在指定行的基础上 向上查找 包含特定字符的行

Answer 1

Do you know why no one answered you?
Don’t you know how to use pipes?
......|grep -A......|grep -B......
Of course, you need to completely implement the function you mentioned, perl/awk, but obviously You need to be very familiar with regular expressions and related grammar to write it yourself. You may not be able to figure it out for a while.
Regular tool learning order (increasing complexity):
grep/egrep/fgrep/ack ->
sed/ed/vim ->
awk/perl