On 20 Feb 2004 22:53:20 -0800, hallian wrote:
> hello -
>
> I have a file with 100 lines of text. I know my line number which
> needs to be replaced too. Say I need to replace line 70 with "I hate
> winters." I have tried "sed" but no luck.... any ideas with sed or
> any syntax..?
>
> line_number=70
> replace_line_with="I hate winters"


Here is a dirty untested kludge.

fn_2_chg=filename_here

head -69 $fn_2_chg > top # get the first 69 lines
echo "I hate winters" >> top # append my new line
_max=`wc -l < $fn_2_chg` # get number of lines in a file
_ln-`expr $_max - 71` # get remaining line count
tail -$_ln >> top # append those lines to the top file.

On Sat, 21 Feb 2004 07:21:46 +0000, Bit Twister wrote:

> On 20 Feb 2004 22:53:20 -0800, hallian wrote:
>> hello -
>>
>> I have a file with 100 lines of text. I know my line number which
>> needs to be replaced too. Say I need to replace line 70 with "I hate
>> winters." I have tried "sed" but no luck.... any ideas with sed or
>> any syntax..?
>>
>> line_number=70
>> replace_line_with="I hate winters"
>
>
> Here is a dirty untested kludge.
>
> fn_2_chg=filename_here
>
> head -69 $fn_2_chg > top # get the first 69 lines
> echo "I hate winters" >> top # append my new line
> _max=`wc -l < $fn_2_chg` # get number of lines in a file
> _ln-`expr $_max - 71` # get remaining line count
> tail -$_ln >> top # append those lines to the top file.

If you're going to do it that way, then replace the last three lines with

tail +71 $fn_2_chg >> top

On 20 Feb 2004 22:53:20 -0800, hallian wrote:
>
>
> hello -
>
> I have a file with 100 lines of text. I know my line number which
> needs to be replaced too. Say I need to replace line 70 with "I hate
> winters." I have tried "sed" but no luck.... any ideas with sed or
> any syntax..?
>
> line_number=70
> replace_line_with="I hate winters"
>
> thanks

Be easier to use ed for this.

ed filename

70c
replacement text
..
wq

Or from the commandline:

echo -e "70c\nreplacement text\n.\nwq" | ed -s filename

or in a script:

ed -s filename < 70c
replacement text
..
wq
YYY

(YYY can be any unique string)


AC

--
ed(1) Check out the original tutorials by Brian W.
Kernighan at the Ed Home Page http://tinyurl.com/2aa6g

"hallian" wrote in message
news:a98477d4.0402202253.53da68f@posting.google.co m

> I have a file with 100 lines of text. I know my line number which
> needs to be replaced too. Say I need to replace line 70 with "I hate
> winters." I have tried "sed" but no luck.... any ideas with sed or
> any syntax..?
>
> line_number=70
> replace_line_with="I hate winters"

sed ' 70s/.*/\"I hate winters.\"/ ' filename > new_filename


tony

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On Sat, 21 Feb 2004 09:58:26 +0000, Alan Connor wrote:

> On 20 Feb 2004 22:53:20 -0800, hallian wrote:
>>
>>
>> hello -
>>
>> I have a file with 100 lines of text. I know my line number which
>> needs to be replaced too. Say I need to replace line 70 with "I hate
>> winters." I have tried "sed" but no luck.... any ideas with sed or
>> any syntax..?
>>
>> line_number=70
>> replace_line_with="I hate winters"
>>
>> thanks
>
> Be easier to use ed for this.
>
> ed filename
>
> 70c
> replacement text
> .
> wq
>
> Or from the commandline:
>
> echo -e "70c\nreplacement text\n.\nwq" | ed -s filename
>
> or in a script:
>
> ed -s filename < > 70c
> replacement text
> .
> wq
> YYY
>
> (YYY can be any unique string)
>
>
> AC

What color is the sky in your universe, in which the above is
easier than sed -i -e '70s/^.*$/I hate winters/' filename ?

I wrote in message news:403736cb_4@corp.newsgroups.com

> sed ' 70s/.*/\"I hate winters.\"/ ' filename > new_filename

sed ' 70s/.*/"I hate winters."/ ' filename > new_filename

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hallian@hotmail.com (hallian) writes:

> hello -
>
> I have a file with 100 lines of text. I know my line number which
> needs to be replaced too. Say I need to replace line 70 with "I hate
> winters." I have tried "sed" but no luck.... any ideas with sed or
> any syntax..?


Very simple. Your sed script file;

70 c\
I hate winters


$ sed -f script input


HTH


>
> line_number=70
> replace_line_with="I hate winters"
>
> thanks

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