bash sed 和 grep 获取匹配的行号
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sed and grep get the line number for a match
提问by georgiana_e
I have a log file and i use sed to extract the lines between two strings which contains the word MATCH. I use sed to extract the lines and grep to only take the lines containing the word "MATCH". I would need the lines number in the log file where a match is found.
我有一个日志文件，我使用 sed 来提取包含单词 MATCH 的两个字符串之间的行。我使用 sed 提取行并使用 grep 只提取包含“MATCH”一词的行。我需要日志文件中找到匹配项的行号。
Date:...
TST STARTS
DISCARD str1
DISCARD str2
MATCH str3 //line 5
MATCH str4 //line 6
DISCARD str5
TST FINISHED
I use this command to extract the lines:
我使用此命令来提取行：
sed -n "/TST STARTS/,/TST FINISHED/p" log.txt | grep "MATCHED".
My output is:
我的输出是：
MATCH str3
MATCH str4
But I also need in the output the lines number:
但我还需要在输出中的行数：
line 5: MATCH str3
line 6: MATCH str4
回答by Mark Setchell
You could use:
你可以使用：
cat -n
to number the lines before you apply your sed, like this:
在应用 sed 之前对行进行编号，如下所示：
cat -n log.txt | sed -n "/TST STARTS/,/TST FINISHED/p" | grep "MATCHED"
Alternatively, you could replace cat -nwith a variant of nl:
或者，您可以替换cat -n为以下变体nl：
nl -n ln log.txt | sed ...
回答by fedorqui 'SO stop harming'
My first attempt wasn't keeping the line number, because the sedpart removes certain lines.
我的第一次尝试没有保留行号，因为该sed部分删除了某些行。
Everything can be done with this awk:
一切都可以用这个来完成awk：
$ awk '/TST STARTS/ {p=1} p && /MATCH/ {print "line "NR" --> "sed -n '/TST STARTS/,/TST FINISHED/ {
/MATCH/ {
=;p
}
}' log.txt
}; /TST FINISHED/ {p=0}' a
line 5 --> MATCH str3 //line 5
line 6 --> MATCH str4 //line 6
'/TST STARTS/ {p=1}sets a flagp=1so that from now on all lines will be taken into account.p && /MATCH/ {print "line "NR" --> "$0}if the flagpis active and the line containsMATCH, then it prints the info./TST FINISHED/ {p=0}turns the flag off when findingTST FINISHEDtext.
'/TST STARTS/ {p=1}设置一个标志，p=1以便从现在开始考虑所有行。p && /MATCH/ {print "line "NR" --> "$0}如果标志p处于活动状态并且该行包含MATCH，则它会打印信息。/TST FINISHED/ {p=0}查找TST FINISHED文本时关闭标志。
回答by NeronLeVelu
| sed "/^[0-9]/ {
N
s/^\(.*\)\n/line :/
}"
line number than the line content on next line
行号比下一行的行内容
##代码##for inclunding on same line (could be done in 1 sed but huge script and poor performance in this case, event with a recall from shell it's easier with a second sed). Could also be don with a previous numbering of line
包括在同一行上（可以在 1 个 sed 中完成，但在这种情况下，巨大的脚本和糟糕的性能，从 shell 召回事件，使用第二个 sed 更容易）。也可以使用先前编号的行
