How to use the a and i command in Gnu sed to add a newline character using n?
In below example, I can use the literal newline characters to add an empty line before and after 3. Is it possible to use n instead? I'm using Gnu sed 4.5.
root@u1804:~# seq 5 | sed -r -e '/3/{i
> ' -e 'a
> ' -e '}'
1
2
3
4
5
root@u1804:~#
sed
asked Jan 6 at 23:34
Ogrish ManOgrish Man
5771416
add a comment |
In below example, I can use the literal newline characters to add an empty line before and after 3. Is it possible to use n instead? I'm using Gnu sed 4.5.
root@u1804:~# seq 5 | sed -r -e '/3/{i
> ' -e 'a
> ' -e '}'
1
2
3
4
5
root@u1804:~#
sed
asked Jan 6 at 23:34
Ogrish ManOgrish Man
5771416
Haha, sorry to bother you again. I'm learning sed right now and I just want to make the command a little bit cleaner. If I can use n instead of a literal newline, I can write the command in a single line, which will make it easy to type and read.
– Ogrish Man
Jan 6 at 23:38
add a comment |
In below example, I can use the literal newline characters to add an empty line before and after 3. Is it possible to use n instead? I'm using Gnu sed 4.5.
root@u1804:~# seq 5 | sed -r -e '/3/{i
> ' -e 'a
> ' -e '}'
1
2
3
4
5
root@u1804:~#
sed
asked Jan 6 at 23:34
Ogrish ManOgrish Man
5771416
In below example, I can use the literal newline characters to add an empty line before and after 3. Is it possible to use n instead? I'm using Gnu sed 4.5.
root@u1804:~# seq 5 | sed -r -e '/3/{i
> ' -e 'a
> ' -e '}'
1
2
3
4
5
root@u1804:~#
sed
sed
asked Jan 6 at 23:34
Ogrish ManOgrish Man
5771416
asked Jan 6 at 23:34
Ogrish ManOgrish Man
5771416
asked Jan 6 at 23:34
Ogrish ManOgrish Man
5771416
asked Jan 6 at 23:34
Ogrish ManOgrish Man
5771416
asked Jan 6 at 23:34
Ogrish ManOgrish Man
5771416
5771416
Haha, sorry to bother you again. I'm learning sed right now and I just want to make the command a little bit cleaner. If I can use n instead of a literal newline, I can write the command in a single line, which will make it easy to type and read.
– Ogrish Man
Jan 6 at 23:38
add a comment |
Haha, sorry to bother you again. I'm learning sed right now and I just want to make the command a little bit cleaner. If I can use n instead of a literal newline, I can write the command in a single line, which will make it easy to type and read.
– Ogrish Man
Jan 6 at 23:38
Haha, sorry to bother you again. I'm learning sed right now and I just want to make the command a little bit cleaner. If I can use n instead of a literal newline, I can write the command in a single line, which will make it easy to type and read.
– Ogrish Man
Jan 6 at 23:38
Haha, sorry to bother you again. I'm learning sed right now and I just want to make the command a little bit cleaner. If I can use n instead of a literal newline, I can write the command in a single line, which will make it easy to type and read.
– Ogrish Man
Jan 6 at 23:38
add a comment |
1 Answer
1
active
oldest
votes
If you use n it will work but you'll end up with two newlines before and after as the commands i and a already add a newline before and respectively after the pattern space is printed so
seq 5 | sed -e '3i\n' -e '3a\n'
prints
1
2
3
4
5
If, for some reason, you want it in one-line you can use multiple -expressions:
seq 5 | sed -e '3{i' -e '' -e 'a' -e '' -e '}'
though in this case it's easier/shorter to just use the hold space:
seq 5 | sed '3{G;H;x;}'
answered Jan 6 at 23:53
don_crisstidon_crissti
51.7k15141168
1
... or (with GNU sed){G;H;z;x;}if you need the hold space to be returned to its initial - empty - state after
– steeldriver
Jan 7 at 0:49
add a comment |
Your Answer
StackExchange.ready(function() {
var channelOptions = {
tags: "".split(" "),
id: "106"
};
initTagRenderer("".split(" "), "".split(" "), channelOptions);
StackExchange.using("externalEditor", function() {
// Have to fire editor after snippets, if snippets enabled
if (StackExchange.settings.snippets.snippetsEnabled) {
StackExchange.using("snippets", function() {
createEditor();
});
}
else {
createEditor();
}
});
function createEditor() {
StackExchange.prepareEditor({
heartbeatType: 'answer',
autoActivateHeartbeat: false,
convertImagesToLinks: false,
noModals: true,
showLowRepImageUploadWarning: true,
reputationToPostImages: null,
bindNavPrevention: true,
postfix: "",
imageUploader: {
brandingHtml: "Powered by u003ca class="icon-imgur-white" href="https://imgur.com/"u003eu003c/au003e",
contentPolicyHtml: "User contributions licensed under u003ca href="https://creativecommons.org/licenses/by-sa/3.0/"u003ecc by-sa 3.0 with attribution requiredu003c/au003e u003ca href="https://stackoverflow.com/legal/content-policy"u003e(content policy)u003c/au003e",
allowUrls: true
},
onDemand: true,
discardSelector: ".discard-answer"
,immediatelyShowMarkdownHelp:true
});
}
});
Sign up or log in
StackExchange.ready(function () {
StackExchange.helpers.onClickDraftSave('#login-link');
});
Sign up using Google
Sign up using Facebook
Sign up using Email and Password
Post as a guest
Required, but never shown
StackExchange.ready(
function () {
StackExchange.openid.initPostLogin('.new-post-login', 'https%3a%2f%2funix.stackexchange.com%2fquestions%2f492907%2fhow-to-use-the-a-and-i-command-in-gnu-sed-to-add-a-newline-character-using-n%23new-answer', 'question_page');
}
);
Post as a guest
Required, but never shown
1 Answer
1
active
oldest
votes
1 Answer
1
active
oldest
votes
active
oldest
votes
active
oldest
votes
If you use n it will work but you'll end up with two newlines before and after as the commands i and a already add a newline before and respectively after the pattern space is printed so
seq 5 | sed -e '3i\n' -e '3a\n'
prints
1
2
3
4
5
If, for some reason, you want it in one-line you can use multiple -expressions:
seq 5 | sed -e '3{i' -e '' -e 'a' -e '' -e '}'
though in this case it's easier/shorter to just use the hold space:
seq 5 | sed '3{G;H;x;}'
answered Jan 6 at 23:53
don_crisstidon_crissti
51.7k15141168
1
... or (with GNU sed){G;H;z;x;}if you need the hold space to be returned to its initial - empty - state after
– steeldriver
Jan 7 at 0:49
add a comment |
If you use n it will work but you'll end up with two newlines before and after as the commands i and a already add a newline before and respectively after the pattern space is printed so
seq 5 | sed -e '3i\n' -e '3a\n'
prints
1
2
3
4
5
If, for some reason, you want it in one-line you can use multiple -expressions:
seq 5 | sed -e '3{i' -e '' -e 'a' -e '' -e '}'
though in this case it's easier/shorter to just use the hold space:
seq 5 | sed '3{G;H;x;}'
answered Jan 6 at 23:53
don_crisstidon_crissti
51.7k15141168
1
... or (with GNU sed){G;H;z;x;}if you need the hold space to be returned to its initial - empty - state after
– steeldriver
Jan 7 at 0:49
add a comment |
If you use n it will work but you'll end up with two newlines before and after as the commands i and a already add a newline before and respectively after the pattern space is printed so
seq 5 | sed -e '3i\n' -e '3a\n'
prints
1
2
3
4
5
If, for some reason, you want it in one-line you can use multiple -expressions:
seq 5 | sed -e '3{i' -e '' -e 'a' -e '' -e '}'
though in this case it's easier/shorter to just use the hold space:
seq 5 | sed '3{G;H;x;}'
answered Jan 6 at 23:53
don_crisstidon_crissti
51.7k15141168
If you use n it will work but you'll end up with two newlines before and after as the commands i and a already add a newline before and respectively after the pattern space is printed so
seq 5 | sed -e '3i\n' -e '3a\n'
prints
1
2
3
4
5
If, for some reason, you want it in one-line you can use multiple -expressions:
seq 5 | sed -e '3{i' -e '' -e 'a' -e '' -e '}'
though in this case it's easier/shorter to just use the hold space:
seq 5 | sed '3{G;H;x;}'
answered Jan 6 at 23:53
don_crisstidon_crissti
51.7k15141168
answered Jan 6 at 23:53
don_crisstidon_crissti
51.7k15141168
answered Jan 6 at 23:53
don_crisstidon_crissti
51.7k15141168
answered Jan 6 at 23:53
don_crisstidon_crissti
51.7k15141168
51.7k15141168
1
... or (with GNU sed){G;H;z;x;}if you need the hold space to be returned to its initial - empty - state after
– steeldriver
Jan 7 at 0:49
add a comment |
1
... or (with GNU sed){G;H;z;x;}if you need the hold space to be returned to its initial - empty - state after
– steeldriver
Jan 7 at 0:49
1
1
... or (with GNU sed)
{G;H;z;x;} if you need the hold space to be returned to its initial - empty - state after– steeldriver
Jan 7 at 0:49
... or (with GNU sed)
{G;H;z;x;} if you need the hold space to be returned to its initial - empty - state after– steeldriver
Jan 7 at 0:49
add a comment |
Thanks for contributing an answer to Unix & Linux Stack Exchange!
- Please be sure to answer the question. Provide details and share your research!
But avoid …
- Asking for help, clarification, or responding to other answers.
- Making statements based on opinion; back them up with references or personal experience.
To learn more, see our tips on writing great answers.
Sign up or log in
StackExchange.ready(function () {
StackExchange.helpers.onClickDraftSave('#login-link');
});
Sign up using Google
Sign up using Facebook
Sign up using Email and Password
Post as a guest
Required, but never shown
StackExchange.ready(
function () {
StackExchange.openid.initPostLogin('.new-post-login', 'https%3a%2f%2funix.stackexchange.com%2fquestions%2f492907%2fhow-to-use-the-a-and-i-command-in-gnu-sed-to-add-a-newline-character-using-n%23new-answer', 'question_page');
}
);
Post as a guest
Required, but never shown
Sign up or log in
StackExchange.ready(function () {
StackExchange.helpers.onClickDraftSave('#login-link');
});
Sign up using Google
Sign up using Facebook
Sign up using Email and Password
Post as a guest
Required, but never shown
Sign up or log in
StackExchange.ready(function () {
StackExchange.helpers.onClickDraftSave('#login-link');
});
Sign up using Google
Sign up using Facebook
Sign up using Email and Password
Post as a guest
Required, but never shown
Sign up or log in
StackExchange.ready(function () {
StackExchange.helpers.onClickDraftSave('#login-link');
});
Sign up using Google
Sign up using Facebook
Sign up using Email and Password
Sign up using Google
Sign up using Facebook
Sign up using Email and Password
Post as a guest
Required, but never shown
Required, but never shown
Required, but never shown
Required, but never shown
Required, but never shown
Required, but never shown
Required, but never shown
Required, but never shown
Required, but never shown
Haha, sorry to bother you again. I'm learning sed right now and I just want to make the command a little bit cleaner. If I can use n instead of a literal newline, I can write the command in a single line, which will make it easy to type and read.
– Ogrish Man
Jan 6 at 23:38