sed 匹配pattern並輸出行號

https://stackoverflow.com/questions/10577256/numbering-lines-matching-the-pattern-using-sed

最簡單的命令是

sed - '/abc/=' tab.txt

8
12

這種只是輸出行號。

root@ubuntu:/home/koyaku# sed -n '/space/{=;p}' tab.txt
8
line space
12
two space
root@ubuntu:/home/koyaku#

這種會輸出行號還有對應行的內容

還有中簡單的辦法 grep -n “space” tab.txt

sed '/1,5!d/p' tab.txt

root@ubuntu:/home/koyaku# sed '1,3!d' tab.txt
Column1*Column2*Column3*Column4.Ah Major Heading
.Ah "Major Heading"
on the UNIX Operating System.
root@ubuntu:/home/koyaku#

 

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How to print particular line number by using sed command

August 8, 2014 by Sharad Chhetri 2 Comments

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This is a single line sed command to illustrate the example of , ” How to print particular line number by using sed command ” .
sed command are the ultimate stream line editor. Often we generally share sed related tips.

Given below is content of file called test. Absolute path is /tmp/test

This is a test
for sed command
to be performed
on test server
Hello World
How do you do

We are using two methods in this tutorial.
Method 1 : By using ‘d’ command i.e for delete
Method 2 : By using ‘p’ command i.e for print

SED : Using ‘d’ command for printing particular line number

Here we will use the regex ‘d’ with sed command, its meaning is delete.

Now from above content, we will print the line number 4 by using below given command

sed '4!d' /tmp/test

Below is the output :

sharad@linuxworld:~$ sed '4!d' /tmp/test 
on test server
sharad@linuxworld:~$

Syntax:
N = Line number
!d = Do not delete

sed 'N!d' /path/of/file

Using ‘d’ command to print range of line number by sed command

You can also define, the range of line number. For example, we want to print from line number 2 to 4.

sed '2,4 !d' /tmp/test

Below is the output :

sharad@linuxworld:~$ sed '2,4 !d' /tmp/test 
for sed command
to be performed
on test server
sharad@linuxworld:~$

Syntax:
NS = From Line number
NT = To Line number
!d = Do not delete

sed 'NF,NT !d' /path/of/file

 

參考文檔如下http://sharadchhetri.com/2014/08/08/print-particular-line-number-using-sed-command/