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 1 hour ago
Ogrish Man
5171415
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 1 hour ago
Ogrish Man
5171415
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
1 hour ago
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 1 hour ago
Ogrish Man
5171415
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 1 hour ago
Ogrish Man
5171415
asked 1 hour ago
Ogrish Man
5171415
asked 1 hour ago
Ogrish Man
5171415
asked 1 hour ago
Ogrish Man
5171415
asked 1 hour ago
Ogrish Man
5171415
5171415
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
1 hour ago
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
1 hour ago
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
1 hour ago
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
1 hour ago
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 1 hour ago
don_crissti
49.9k15132161
... or (with GNU sed){G;H;z;x;}if you need the hold space to be returned to its initial - empty - state after
– steeldriver
40 mins ago
add a comment |
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1 Answer
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1 Answer
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active
oldest
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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 1 hour ago
don_crissti
49.9k15132161
... or (with GNU sed){G;H;z;x;}if you need the hold space to be returned to its initial - empty - state after
– steeldriver
40 mins ago
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 1 hour ago
don_crissti
49.9k15132161
... or (with GNU sed){G;H;z;x;}if you need the hold space to be returned to its initial - empty - state after
– steeldriver
40 mins ago
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 1 hour ago
don_crissti
49.9k15132161
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 1 hour ago
don_crissti
49.9k15132161
answered 1 hour ago
don_crissti
49.9k15132161
answered 1 hour ago
don_crissti
49.9k15132161
answered 1 hour ago
don_crissti
49.9k15132161
49.9k15132161
... or (with GNU sed){G;H;z;x;}if you need the hold space to be returned to its initial - empty - state after
– steeldriver
40 mins ago
add a comment |
... or (with GNU sed){G;H;z;x;}if you need the hold space to be returned to its initial - empty - state after
– steeldriver
40 mins ago
... or (with GNU sed)
{G;H;z;x;} if you need the hold space to be returned to its initial - empty - state after– steeldriver
40 mins ago
... or (with GNU sed)
{G;H;z;x;} if you need the hold space to be returned to its initial - empty - state after– steeldriver
40 mins ago
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
1 hour ago