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 yesterday
Ogrish ManOgrish Man
5201415
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 yesterday
Ogrish ManOgrish Man
5201415
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
yesterday
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 yesterday
Ogrish ManOgrish Man
5201415
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 yesterday
Ogrish ManOgrish Man
5201415
asked yesterday
Ogrish ManOgrish Man
5201415
asked yesterday
Ogrish ManOgrish Man
5201415
asked yesterday
Ogrish ManOgrish Man
5201415
asked yesterday
Ogrish ManOgrish Man
5201415
5201415
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
yesterday
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
yesterday
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
yesterday
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
yesterday
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 yesterday
don_crisstidon_crissti
50k15132161
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
yesterday
add a comment |
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1 Answer
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active
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1 Answer
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active
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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 yesterday
don_crisstidon_crissti
50k15132161
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
yesterday
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 yesterday
don_crisstidon_crissti
50k15132161
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
yesterday
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 yesterday
don_crisstidon_crissti
50k15132161
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 yesterday
don_crisstidon_crissti
50k15132161
answered yesterday
don_crisstidon_crissti
50k15132161
answered yesterday
don_crisstidon_crissti
50k15132161
answered yesterday
don_crisstidon_crissti
50k15132161
50k15132161
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
yesterday
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
yesterday
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
yesterday
... or (with GNU sed)
{G;H;z;x;} if you need the hold space to be returned to its initial - empty - state after– steeldriver
yesterday
add a comment |
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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
yesterday