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Edit file content at the specific line.

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# 1  
Old 03-18-2011
Edit file content at the specific line.
How to edit file content at the specific line? For example at below

The things to edit --> This is line 2. And it is below line 1.

Code:
This is line 1.       
This is line 2.     # i want to append some words at this row line. How?
This is line 3.

# 2  
Old 03-18-2011
Hi alvin0618,

Something like:
Code:
awk '{
if($0~"This is line 1") {
print; getline; print $0,"<<Words I have added>>" 
}
else 
print $0
}' inputfile
This is line 1.       
This is line 2.      <<Words I have added>>
This is line 3.

Regards
# 3  
Old 03-18-2011
Quote:
Originally Posted by cgkmal
Hi alvin0618,

Something like:
Code:
awk '{
if($0~"This is line 1") {
print; getline; print $0,"<<Words I have added>>" 
}
else 
print $0
}' inputfile
This is line 1.       
This is line 2.      <<Words I have added>>
This is line 3.

Regards
Hi, cgkmal. Thanks for the reply.

I follow the code you provide
the system prompts this errors
Code:
awk: syntax error near line 1
awk: illegal statement near line 1
awk: syntax error near line 4
awk: bailing out near line 4

# 4  
Old 03-18-2011
Through sed..
Code:
sed 's/line 2/& Append words here../' inputfile > outfile
or
sed '/line 1/{N;s/$/& Append words here/}' inputfile > outfile

# 5  
Old 03-18-2011
Quote:
Originally Posted by alvin0618
Hi, cgkmal. Thanks for the reply.

I follow the code you provide
the system prompts this errors
Code:
awk: syntax error near line 1
awk: illegal statement near line 1
awk: syntax error near line 4
awk: bailing out near line 4

alvin, please try directly with echo".." instead of a file and see if error appear, if so, in what position, like this:
Code:
echo "This is line 1.       
This is line 2.     
This is line 3." | awk '{if($0~"This is line 1") {print $0; getline; print $0,"<<Words I have added>>"} else print $0}'
This is line 1.       
This is line 2.      <<Words I have added>>
This is line 3.

Regards
# 6  
Old 03-18-2011
Add "anyword" at the end of line 2 :

Code:
# cat tst
a1111,222 2222,333333,22222 22,555555 555
b1111,2222222,333333,444444 4444444,55555
a1111,222 2222,333333,22222 22,555555 555
a1111,222 2222,333333,22222 22,555555 555
a1111,222 2222,333333,22222 22,555555 555
#

then
Code:
# printf "2s/.*/& anyword/\nw\nq\n" | ed -s tst

or
Code:
# printf "2s/$/ anyword/\nw\nq\n" | ed -s tst

will give

Code:
# cat tst
a1111,222 2222,333333,22222 22,555555 555
b1111,2222222,333333,444444 4444444,55555 anyword
a1111,222 2222,333333,22222 22,555555 555
a1111,222 2222,333333,22222 22,555555 555
a1111,222 2222,333333,22222 22,555555 555
#

Last edited by ctsgnb; 03-18-2011 at 05:49 AM..
# 7  
Old 03-18-2011
Quote:
Originally Posted by michaelrozar17
Through sed..
Code:
sed 's/line 2/& Append words here../' inputfile > outfile
or
sed '/line 1/{N;s/$/& Append words here/}' inputfile > outfile

Hi, ichaelrozar17
Thanks for the reply. It works perfectly.
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