Using sed in a script

Viper_Scull · 2012-01-09 19:11:15

Hi. I would like towrite a script to search in a group of files for a pattern (in this case an specific word), and delete the lines containing that word.

Can anyone give me a hand?

thanks!

dodo3773 · 2012-01-09 19:21:59

If you are searching for something are you sure it is sed that you want to use? Could you give an example and provide a little more information into what you are trying to do?

Edit: I should have read the original post more carefully.

Last edited by dodo3773 (2012-01-09 19:33:21)

karol · 2012-01-09 19:22:30

# delete lines matching pattern
sed '/pattern/d'

Edit:

[karol@black foo1]$ cat a
foo
bar
baz
[karol@black foo1]$ cat b
foo bar baz
bar
foo
baz
[karol@black foo1]$ cat c
foo
bar
foo
baz
[karol@black foo1]$ sed -i '/foo/d' $(find . -type f)
[karol@black foo1]$ cat a b c
bar
baz
bar
baz
bar
baz

Last edited by karol (2012-01-09 19:30:48)

Viper_Scull · 2012-01-09 19:37:10

I thought sed would be the easiest way to do it. Maybe perl would do it as well..

The idea would be something like this

for file in path
read every line.
if line matches pattern then delete line

Edit: Karol i just saw your editing. Thank you, i think that's what i needed.

Last edited by Viper_Scull (2012-01-09 19:42:17)

falconindy · 2012-01-09 23:44:13

Please don't use find like that, it's not always going to do what you want.

find . -type f -exec sed -i '/foo/d' {} +

karol · 2012-01-09 23:48:26

falconindy wrote:

Please don't use find like that, it's not always going to do what you want.
find . -type f -exec sed -i '/foo/d' {} +

Of course you're right, "my way" didn't even look right, but I've missed a typo when trying to do it the correct way. Thanks.
Need ... more ... coffee ...

Viper_Scull · 2012-01-12 21:03:46

Is the sintaxis of

find . -type f -exec sed -i '/foo/d' {} +

correct? It won't work on my pc like that.

What's the + for?

Last edited by Viper_Scull (2012-01-12 21:04:41)

karol · 2012-01-12 23:53:46

Yes, this line works.
What do you mean by "It won't work on my pc like that"? Are you getting any errors?
You should of course replace 'foo' with the phrase you want to remove. What's the word you want to get rid of?

Viper_Scull · 2012-01-13 00:21:16

Never mind. It's working now. I wasnt getting any error earlier just the propmt didnt show up like if it was expecting more arguments.

Thanks for your help.

I'm trying to understand the script.
what's the brackets and the + for?

Last edited by Viper_Scull (2012-01-13 00:21:50)

karol · 2012-01-13 00:23:23

Viper_Scull wrote:

what's the brackets and the + for?

Which part of 'man find' seems unclear? :-)

Arch Linux

#1 2012-01-09 19:11:15

Using sed in a script

#2 2012-01-09 19:21:59

Re: Using sed in a script

#3 2012-01-09 19:22:30

Re: Using sed in a script

#4 2012-01-09 19:37:10

Re: Using sed in a script

#5 2012-01-09 23:44:13

Re: Using sed in a script

#6 2012-01-09 23:48:26

Re: Using sed in a script

#7 2012-01-12 21:03:46

Re: Using sed in a script

#8 2012-01-12 23:53:46

Re: Using sed in a script

#9 2012-01-13 00:21:16

Re: Using sed in a script

#10 2012-01-13 00:23:23

Re: Using sed in a script

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