Question

我有一个看起来像这样的文本文件：

2017-02-28 18:58:00 (UTC) ServerName: PROBLEM [2018994] bla bla bla bleh bli blu blo [30393](High|Ack: No)
2017-02-28 18:58:00 (UTC) Server Name 2: PROBLEM [2018f34] doo ba di ba doo [32393](High|Ack: Yes)
2017-02-28 18:58:00 (UTC) ServerName 3: PROBLEM [9865994] Link is down [30393](High|Ack: No)

我想过滤此文件，只获取每行的错误消息。根据我提供的示例，输出将是：

bla bla bla bleh bli blu blo
doo ba di ba doo
Link is down

一件重要的事情：服务器名称有时可以包含空格。我已经尝试了几个小时的sed，awk，grep，cut，它让我发疯了。任何线索？

Answer 1

awk 解决方案（针对静态输入格式）：

awk -F'[][]' '{ print $3 }' file

输出：

 bla bla bla bleh bli blu blo 
 doo ba di ba doo 
 Link is down

-F'[][]' - 将[和]视为字段分隔符

Answer 2

动态内容的Perl，假设格式始终相同

perl -lne 'print $& if /]\K.*(?=\[)/' file

输入

2017-02-28 18:58:00 (UTC) ServerName: PROBLEM [2018994] bla bla bla bleh bli blu blo [30393](High|Ack: No)
2017-02-28 18:58:00 (UTC) Server Name 2: PROBLEM [2018f34] doo ba di ba doo [32393](High|Ack: Yes)
2017-02-28 18:58:00 (UTC) ServerName 3: PROBLEM [9865994] Link is down [30393](High|Ack: No)
2017-02-28 18:58:00 (UTC) ServerName 3: PROBLEM [9865994] 2017-02-28 18:58:00 (UTC) ServerName 3: PROBLEM [9865994] Link is down [30393](High|Ack: No) [30393](High|Ack: No)

输出

 bla bla bla bleh bli blu blo
 doo ba di ba doo
 Link is down
 2017-02-28 18:58:00 (UTC) ServerName 3: PROBLEM [9865994] Link is down [30393](High|Ack: No)

Answer 3

sed 's/[^]]*.\(.*\)\[.*/\1/' file

Answer 4

使用my_total = Byte.objects.count()

sed

控制台中的文本操作

4 个答案: