bash 如何同时grep和cut
声明：本页面是StackOverFlow热门问题的中英对照翻译，遵循CC BY-SA 4.0协议，如果您需要使用它，必须同样遵循CC BY-SA许可，注明原文地址和作者信息，同时你必须将它归于原作者（不是我）：StackOverFlow
原文地址: http://stackoverflow.com/questions/6416057/
Warning: these are provided under cc-by-sa 4.0 license. You are free to use/share it, But you must attribute it to the original authors (not me):
StackOverFlow
How to grep and cut at the same time
提问by Johnathon
Having trouble with grepping and cutting at the same time
I have a file test.txt.
Inside the file is this syntax
在同时进行 grepping 和 cut 时遇到问题，我有一个文件test.txt. 文件里面是这个语法
File: blah.txt Location: /home/john/Documents/play/blah.txt
File: testing.txt Location /home/john
My command is ./delete -r (filename), say filename is blah.txt.
我的命令是./delete -r (filename)，说文件名是blah.txt.
How would i search test.txtfor blah.txtand cut the /home/john/Documents/play/blah.txtout and put it in a variable
如何将我搜索test.txt了blah.txt和切/home/john/Documents/play/blah.txt出，并把它放在一个变量
回答by Blagovest Buyukliev
grep -P "^File: blah\.txt Location: .+" test.txt | cut -d: -f3
回答by dimba
Prefer always to involse as less as possible external command for your task.
最好总是为您的任务使用尽可能少的外部命令。
You can achive what you want using singleawkcommand:
您可以使用单个awk命令实现您想要的：
awk '/^File: blah.txt/ { print }' test.txt
回答by Loukan ElKadi
Try this one ;)
试试这个 ;)
filename=$(grep 'blah.txt' test.txt | grep -oP 'Location:.*' | grep -oP '[^ ]+$')
./delete $filename
