[SOLVED] append text with sed

tripialos · 11-04-2014, 09:04 AM

Hi guys

I want to append a space to each line of a file that matches a specific pattern. For example:

Code:

this is test line
Another line
third line
Another test line
last line

I want to add a space to the lines that begin with the word "Another" so the text will transfrom to

Code:

this is test line
 Another line
third line
 Another test line
last line

Any ideas how you can do this with sed?

bstaletic · 11-04-2014, 09:25 AM

Original file (let's call it test):

Code:

cat test
this is test line
Another line
third line
Another test line
last line

Command

Code:

cat test | sed s/Another/\ Another/

otputs:

Code:

this is test line
 Another line
third line
 Another test line
last line

So redircting the output of that command to a file (let's call it test.new) looks like:

Code:

cat test | sed s/Another/\ Another/ > test.new

And finally test.new looks like:

Code:

cat test.new

this is test line
 Another line
third line
 Another test line
last line

tripialos · 11-04-2014, 09:38 AM

Quote:

Originally Posted by bstaletic

Original file (let's call it test):

Code:

cat test
this is test line
Another line
third line
Another test line
last line

Command

Code:

cat test | sed s/Another/\ Another/

otputs:

Code:

this is test line
 Another line
third line
 Another test line
last line

So redircting the output of that command to a file (let's call it test.new) looks like:

Code:

cat test | sed s/Another/\ Another/ > test.new

And finally test.new looks like:

Code:

cat test.new

this is test line
 Another line
third line
 Another test line
last line

YEap you are right. I was thinking about this method but i was afraid tha the whole line would be replaced...which apparently it didnt.

Well next time i should try first.

Thanks :-D

schneidz · 11-04-2014, 09:47 AM

Quote:

Originally Posted by tripialos

...
Well next time i should try first.

Thanks :-D

thats the exact reason i didnt reply to your post. it seemed like a homework question and you showed no effort.

szboardstretcher · 11-04-2014, 10:19 AM

Quote:

Originally Posted by tripialos

Well next time i should try first.

In reality, if you don't learn to do that soon, your degree/diploma will be pointless.

Also, there are about a million examples of this available from a simple internet search, yet you had to sign up at a forum and ask the question directly. That isn't showing much ambition on your part.

Learn to research issues, and use the documentation and manuals available to you. Learning how to learn, and educating yourself constantly, is the most important step in your education.

tripialos · 11-12-2014, 04:24 AM

Quote:

Originally Posted by schneidz

thats the exact reason i didnt reply to your post. it seemed like a homework question and you showed no effort.

Hey

This is not a homework. I actually tried alot of methods and ways and placed alot of efford but none of them worked.

After 10 hours on the keyboard:
Some times the answear is right in front of you but you cant see it.
Some times the answear is more simple than you think it is.

tripialos · 11-12-2014, 04:33 AM

Quote:

Originally Posted by szboardstretcher

In reality, if you don't learn to do that soon, your degree/diploma will be pointless.

Also, there are about a million examples of this available from a simple internet search, yet you had to sign up at a forum and ask the question directly. That isn't showing much ambition on your part.

Learn to research issues, and use the documentation and manuals available to you. Learning how to learn, and educating yourself constantly, is the most important step in your education.

Hi m8.

Thanks for you advises.

I finised my degree and my masters long time ago. Best thing i earned was not the titles but "how to learn".

I have subscribed long time ago on this forum also as a donador hence this is not actually the reason i subscribed here.

Indeed there were loads of examples on the net but when you "false" understood a certain basic fact in your head then all solutions will look false in your eyes.

Personally "i am discovering the world" almost everyday (meaning i learn something obvius which puzzle up things i had in my mind) which i am happy for.

As previusly stated, my mistake was that i took for granted those solutions wont work.

Again thanks for your advises :-)

all the best