Delete a partiular line and 17 lines after that

Question

I have a report that pulls some information IP address and host name, etc. Some some servers have a heading like: NOTICE TO USERS (followed by about 17 lines of text information) when I cat the file, I do not need the NOTICE (and 17 more line after that on some servers). How can I get rid of it?

We expect the question's requirements to be more precise. Show some sample text and explain which lines you want to exclude. — glenn jackman, Apr 02 '18 at 15:43

Hauke Laging · Answer 1 · 2018-04-02T16:26:53.800

2

awk '/NOTICE TO USERS/ { lastdelline=NR+17 };
    lastdelline>0 && NR<=lastdelline { next; }; { print; }' inputfile

edited Apr 02 '18 at 16:26

answered Apr 02 '18 at 15:40

Hauke Laging

90,279

Why NR+5 and not NR+17? – codeforester Apr 02 '18 at 15:42
3

@codeforester 5 is "about" 17 :-) – nohillside Apr 02 '18 at 15:44
I tried the awk commnad, it did not take out any thing. The NOTICE TO USERS (followed by 17 lines) is a part of /etc/issue. My script does ssh from on server to a number of servers and gathers information like IP, host name ,etc. I am still trying to get rid off NOTICE TO USERS (followed by 17 lines) which appears on some servers. I appreciate any help. – tester787 Apr 02 '18 at 16:23
awk '/NOTICE TO USERS/ { lastdelline=NR+17 }; lastdelline>0 && NR<=lastdelline { next; }; { print; }' test.info – tester787 Apr 02 '18 at 16:43

score 1 · Accepted Answer · answered Apr 02 '18 at 18:10

1

You can use below sed command to achieve the same

sed '/NOTICE TO USERS/,+17d' filename

IF you want to delete the 17lines with NOTICE TO USERS line in same file means you can use -i option in sed command

sed -i '/NOTICE TO USERS/,+17d' filename

answered Apr 02 '18 at 18:10

Praveen Kumar BS

5,211

Delete a partiular line and 17 lines after that

2 Answers2