Comments on: Unix Sed Tutorial: Append, Insert, Replace, and Count File Lines

By: arvind

arvind — Thu, 12 Jan 2012 13:49:11 +0000

I want to add “something else” after “something” , so i use the below code.
sed ‘
/something/ a\
something else
‘ test.txt
This will just list the contents,but how do i write this new line to the file. I mean the same file and not to a new file.

By: mary

mary — Fri, 29 Jul 2011 21:14:06 +0000

I want to change the first line of a csv file into lower case. How to do that. thanks

By: David Liontooth

David Liontooth — Sat, 18 Jun 2011 15:28:04 +0000

Balaji -- they all work in scripts; see here for instance

By: David Liontooth

David Liontooth — Sat, 18 Jun 2011 15:26:07 +0000

Thanks! I nominate for the best set of sed instructions on the Internet.

By: Balaji

Balaji — Fri, 06 May 2011 09:25:19 +0000

Very nice tutorial…
But how to write these sed commands in a script… do they work only in command-line?

By: Anonymous

Anonymous — Wed, 01 Dec 2010 09:19:23 +0000

@ Blast

cat file2>> file1 should work fine

By: frankhuang

frankhuang — Wed, 17 Nov 2010 08:25:05 +0000

To balast:
for f in `ls file[2-4].txt` ; do
cat file1.txt $f > newfile
cp newfile $f
done

To Manish:
sed ‘s/127\\\.0/192\\\.168/g’ filename
works

By: Manish

Manish — Thu, 04 Nov 2010 14:53:56 +0000

How I can escape Back slashes in sed. I want to change the pattern or string
from
allow ^127\.0\.0\.1$
to
allow ^192\.168\.1\.10$

Thank You,
Manish

By: Balast

Balast — Sat, 03 Jul 2010 18:29:59 +0000

Hi,

How to insert content of file1 on the top of the file2, file3, file4, etc in same directory ?

By: Ramesh Natarajan

Ramesh Natarajan — Fri, 11 Dec 2009 00:02:17 +0000

@linuxindetails,

Thanks for clarifying how the option -i works on Debian.