1

So, I am trying to insert b.b00 --- after modules= and before jumpstart.gz in a file on Linux, but can't seem to figure out how to actually do it. I did look at other answers in the forum and apparently none of them have any effects. My file name is boot.cfg and its content is as follows:

bootstate=0
timeout=5
kernelopt=runweasel
modules=jumstart.gz --- useropts.gz --- features.gz --- qeden.v00 ---tpm.v00
build=3.322.2
updated=0

What I am looking for is as follows:

bootstate=0
timeout=5
kernelopt=runweasel
modules=b.b00 --- jumstart.gz --- useropts.gz --- features.gz --- qeden.v00 ---tpm.v00
build=3.322.2
updated=0

So, basically add b.b00 --- after modules and before jumpstart.gz.

Some commands I tried were:

sed -i '/\[modules=\]/a b.b00 ---' boot.cfg
sed -i '/^jumpstart.gz.*/i b.b00 ---' boot.cfg

None of these commands seem to have any effect on the file. Could anyone please point me in the right direction. I appreciate the help!

Improve this question

2 Answers 2

Reset to default
1

As far as I can tell, you really only need to insert b.b00 --- after modules= and doing so will already ensure that it comes before jumstart.gz. So, you were almost there, but for some reason you added extra [ and ] to your sed command and, since those characters don't appear in the file, that's why the command did nothing. Try this instead:

sed 's/modules=/modules=b.b00 --- /' grub.cfg

Once you've confirmed that works as expected, add the -i to edit the file in place:

sed -i 's/modules=/modules=b.b00 --- /' grub.cfg

If you only want to do this on lines matching modules= and containing jumpstart.gz, try this:

sed '/jumstart.gz/s/modules=/modules=b.b00 --- /' grub.cfg

And, again, to make it edit the file, use -i:

sed -i '/jumstart.gz/s/modules=/modules=b.b00 --- /' grub.cfg
Improve this answer
1
  • Solved it! Thank you for the clear explanation as well! Commented Nov 22, 2022 at 17:04
0

If you use this sentence it should work:

sed -i 's/modules=/modules=b.b00 --- /g' boot.cfg

modules= would be replaced with modules=b.b00 --- keeping the rest of the content in the same way

Improve this answer

You must log in to answer this question.

Start asking to get answers

Find the answer to your question by asking.

Ask question

Explore related questions

See similar questions with these tags.