问题
I need to find a line in a file that starts with an a and the last word in the line ends with an e.
How can I do it with a tool like grep?
回答1:
Just say this:
grep '^a.*e$' file
This means: look for those lines starting (^) with a, then 0 or more characters and finally and e at the end of the line ($).
Test
$ cat a
hello
and thisfinishes with e
foo
$ grep '^a.*e$' a
and thisfinishes with e
回答2:
Simple answer : use grep.
grep -E "^a.*e$" filename
the ^ indicates the beggining of the line
the $ marks the end of the line
the .* means any character (the .) repeated from zero to any number of times (the *).
Many topics have already answered this questions, like this one.
If you want to know more of searching, you could look more in depth into REGEX.
来源：https://stackoverflow.com/questions/28899349/find-lines-starting-with-one-specific-character-and-ending-with-another-one