Arch Linux

I'mGeorge

Member

Registered: 2011-03-23

Posts: 150

[SOLVED] shell script trouble

I need to insert some characters after a line that contains a certain word. Let's say my text file contains something like:

this
is
about
shell
programming

how can I insert the word "advanced" so it would be between about and shell, resulting in a text file that looks like

this
is
about
advanced
shell
programming

I'm not interested in a method that will insert advanced using the number of the proper line, I need to know how can I insert a word, on a new line referring to another string of characters.

Thanks for your time

Last edited by I'mGeorge (2011-06-17 05:27:33)

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I've first installed Arch in March

falconindy

Developer

From: New York, USA

Registered: 2009-10-22

Posts: 4,111

Website

Re: [SOLVED] shell script trouble

Use sed. Add the -i flag to edit "in place" or just redirect output to a new file.

$ cat file
this
is
about
shell
programming

$ sed '/^about$/aadvanced' file
this
is
about
advanced
shell
programming

$ sed '/^about$/iadvanced' file
this
is
advanced
about
shell
programming

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blog | ±github

egan

Member

From: Mountain View, CA

Registered: 2009-08-17

Posts: 273

Re: [SOLVED] shell script trouble

You can replace the word of interest with itself, a newline, and the inserted word.

< TEXT sed 's/about/about\nadvanced/'

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GitHub

I'mGeorge

Member

Registered: 2011-03-23

Posts: 150

Re: [SOLVED] shell script trouble

thanks a bunch, this is exactly what I was looking for

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I've first installed Arch in March