sed append/insert

[sandeep t]

I have a file which looks like this:

<components>
<folder name="bin"/>
<components>

and I would like to add one line as shown below:

<components>
<folder name="bin"/>
<components>
<component name="Server" />

How can I do it using sed?

[hexcode]

you can do that with echo "line you want to add " >> filetoadd
but with sed you can add this way
The "a" command appends a line after the range or pattern. This example will add a line after every line with "WORD:"

#!/bin/sh
sed '
/WORD/ a\
Add this line after every line with WORD
'

[sandeep t]

First, I don't have just 3 lines in my files, its 100 lines file and I just showed few lines here. So the first method shouldn't work.
The second one will append the line with every line with WORD. I don't want that also. I just want to add a line after a line containing <components>, but that line containing component should be after "<folder name=bin>"
Please see the 2 files again

[hexcode]

you didn't explained that before, but here is your solution

sed '/<folder name=bin>/ {
N
/<components>/ {
a\
Add this line after
}
}' file