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sed fails to remove newline character
2019 Community Moderator ElectionHow to remove multiple blank lines from a file?Why the inconsistency with using cat vs. echo piped to this sed command?Remove backslash + newline sequencesHow can I make sed not append a newline character?Remove the exact same matching lines with sedArray from piped commands failsusing sed to modify all files in a directory and name the outputs accordinglysed behaves strange on android tabletHow to create a folder from a string in a file?Scripting id3 tags with id3v2 and sed
I've been using sed for quite some time but here is a quirk I came around with, which I am not able to resolve.
Let me explain my problem with the actual case.
Scene#1
printf "ls" | xclip -selection clipboard
echo "ls" | xclip -selection clipboard
In the first command, I pipe printf output to xclip so that it gets copied to the clipboard. Now, printf, unlike echo does not insert a new line at the end by default. So, if I paste this content into terminal, the ls command that is copied does not automatically run.
In the second, there is a new line at the end, so pasting the clipboard content also results in the running of the command in the clipboard.
This is undesirable for me. So, I wanted to remove the newline using sed, but it failed, as explained in the scene below.
Scene#2
echo "ls" | sed -r 's/n//g' | xclip -selection clipboard
The content in the clipboard still contains new-line. When I paste it into terminal, the command automatically runs.
I also tried removing carriage return character r. But nada. It seems I am missing something very crucial/basic here.
sed newlines
edited Jan 25 '15 at 0:00
Gilles
541k12810951611
asked Jan 24 '15 at 23:52
shivamsshivams
2,94111426
add a comment |
I've been using sed for quite some time but here is a quirk I came around with, which I am not able to resolve.
Let me explain my problem with the actual case.
Scene#1
printf "ls" | xclip -selection clipboard
echo "ls" | xclip -selection clipboard
In the first command, I pipe printf output to xclip so that it gets copied to the clipboard. Now, printf, unlike echo does not insert a new line at the end by default. So, if I paste this content into terminal, the ls command that is copied does not automatically run.
In the second, there is a new line at the end, so pasting the clipboard content also results in the running of the command in the clipboard.
This is undesirable for me. So, I wanted to remove the newline using sed, but it failed, as explained in the scene below.
Scene#2
echo "ls" | sed -r 's/n//g' | xclip -selection clipboard
The content in the clipboard still contains new-line. When I paste it into terminal, the command automatically runs.
I also tried removing carriage return character r. But nada. It seems I am missing something very crucial/basic here.
sed newlines
edited Jan 25 '15 at 0:00
Gilles
541k12810951611
asked Jan 24 '15 at 23:52
shivamsshivams
2,94111426
add a comment |
I've been using sed for quite some time but here is a quirk I came around with, which I am not able to resolve.
Let me explain my problem with the actual case.
Scene#1
printf "ls" | xclip -selection clipboard
echo "ls" | xclip -selection clipboard
In the first command, I pipe printf output to xclip so that it gets copied to the clipboard. Now, printf, unlike echo does not insert a new line at the end by default. So, if I paste this content into terminal, the ls command that is copied does not automatically run.
In the second, there is a new line at the end, so pasting the clipboard content also results in the running of the command in the clipboard.
This is undesirable for me. So, I wanted to remove the newline using sed, but it failed, as explained in the scene below.
Scene#2
echo "ls" | sed -r 's/n//g' | xclip -selection clipboard
The content in the clipboard still contains new-line. When I paste it into terminal, the command automatically runs.
I also tried removing carriage return character r. But nada. It seems I am missing something very crucial/basic here.
sed newlines
edited Jan 25 '15 at 0:00
Gilles
541k12810951611
asked Jan 24 '15 at 23:52
shivamsshivams
2,94111426
I've been using sed for quite some time but here is a quirk I came around with, which I am not able to resolve.
Let me explain my problem with the actual case.
Scene#1
printf "ls" | xclip -selection clipboard
echo "ls" | xclip -selection clipboard
In the first command, I pipe printf output to xclip so that it gets copied to the clipboard. Now, printf, unlike echo does not insert a new line at the end by default. So, if I paste this content into terminal, the ls command that is copied does not automatically run.
In the second, there is a new line at the end, so pasting the clipboard content also results in the running of the command in the clipboard.
This is undesirable for me. So, I wanted to remove the newline using sed, but it failed, as explained in the scene below.
Scene#2
echo "ls" | sed -r 's/n//g' | xclip -selection clipboard
The content in the clipboard still contains new-line. When I paste it into terminal, the command automatically runs.
I also tried removing carriage return character r. But nada. It seems I am missing something very crucial/basic here.
sed newlines
sed newlines
edited Jan 25 '15 at 0:00
Gilles
541k12810951611
asked Jan 24 '15 at 23:52
shivamsshivams
2,94111426
edited Jan 25 '15 at 0:00
Gilles
541k12810951611
asked Jan 24 '15 at 23:52
shivamsshivams
2,94111426
edited Jan 25 '15 at 0:00
Gilles
541k12810951611
edited Jan 25 '15 at 0:00
Gilles
541k12810951611
edited Jan 25 '15 at 0:00
Gilles
541k12810951611
541k12810951611
asked Jan 24 '15 at 23:52
shivamsshivams
2,94111426
asked Jan 24 '15 at 23:52
shivamsshivams
2,94111426
asked Jan 24 '15 at 23:52
shivamsshivams
2,94111426
2,94111426
add a comment |
add a comment |
4 Answers
4
active
oldest
votes
sed delimits on newlines - they are always removed on input and reinserted on output. There is never a newline character in a sed pattern space which did not occur as a result of an edit you have made.
Note: with the exception of GNU sed's -z mode...
Just use tr:
echo ls | tr -d \n | xclip -selection clipboard
Or, better yet, forget sed altogether:
printf ls | xclip -selection clipboard
answered Jan 25 '15 at 0:00
mikeservmikeserv
45.9k668160
add a comment |
Many text processing tools, including sed, operate on the content of the line, excluding the newline character. The first thing sed does when processing a line is to strip off the newline at the end, then it executes the commands in the script, and it adds a final newline when printing out. So you won't be able to remove the newline with sed.
To remove all the newlines, you can use tr instead:
echo "ls" | tr -d 'n' | xclip
edited Jan 25 '15 at 18:42
JJoao
7,3591928
answered Jan 25 '15 at 0:03
GillesGilles
541k12810951611
add a comment |
If you are just putting commands in the clipboard
echo -n "ls " | xclip -selection clipboard
If you additionally need to make more complex transformations,
echo "ls " | perl -pe 's/n//' | xclip -selection clipboard
answered Jan 25 '15 at 0:42
JJoaoJJoao
7,3591928
Hmm. Smooth solution. I guess it is perhaps time to move on to perl or python for regex.
– shivams
Jan 25 '15 at 0:49
2
@shivams -perlandpythonare both much slower thansedcan be when used correctly. Learning to use it correctly is the key, though.
– mikeserv
Jan 25 '15 at 1:26
@mikeserv - I agree; special for oneliner sed is wonderful. If the transformations are going to become more complex, then I prefer perl/python/gawk.
– JJoao
Jan 25 '15 at 12:35
@JJoa: Your preference is your own, butsedcan do far more than handle just your one-liners, and it can likely do so faster than any of those other tools you mention.
– mikeserv
Jan 25 '15 at 14:54
1
@mikeserv - once again, I agree with you. Some year ago I had a translation system EN-PT written in sed (20000 s/.../.../), generated by sed! And it worked! Later it became Perl, to have arrays, hashes, functions, packages and CPAN.
– JJoao
Jan 25 '15 at 21:10
add a comment |
You can replace newlines in sed by passing it the -z option.
sed -z 's/n/ /g'
Sed man page:
-z, --null-data separate lines by NUL characters
answered 4 hours ago
JSON C11JSON C11
1013
New contributor
JSON C11 is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
add a comment |
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4 Answers
4
active
oldest
votes
4 Answers
4
active
oldest
votes
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oldest
votes
sed delimits on newlines - they are always removed on input and reinserted on output. There is never a newline character in a sed pattern space which did not occur as a result of an edit you have made.
Note: with the exception of GNU sed's -z mode...
Just use tr:
echo ls | tr -d \n | xclip -selection clipboard
Or, better yet, forget sed altogether:
printf ls | xclip -selection clipboard
answered Jan 25 '15 at 0:00
mikeservmikeserv
45.9k668160
add a comment |
sed delimits on newlines - they are always removed on input and reinserted on output. There is never a newline character in a sed pattern space which did not occur as a result of an edit you have made.
Note: with the exception of GNU sed's -z mode...
Just use tr:
echo ls | tr -d \n | xclip -selection clipboard
Or, better yet, forget sed altogether:
printf ls | xclip -selection clipboard
answered Jan 25 '15 at 0:00
mikeservmikeserv
45.9k668160
add a comment |
sed delimits on newlines - they are always removed on input and reinserted on output. There is never a newline character in a sed pattern space which did not occur as a result of an edit you have made.
Note: with the exception of GNU sed's -z mode...
Just use tr:
echo ls | tr -d \n | xclip -selection clipboard
Or, better yet, forget sed altogether:
printf ls | xclip -selection clipboard
answered Jan 25 '15 at 0:00
mikeservmikeserv
45.9k668160
sed delimits on newlines - they are always removed on input and reinserted on output. There is never a newline character in a sed pattern space which did not occur as a result of an edit you have made.
Note: with the exception of GNU sed's -z mode...
Just use tr:
echo ls | tr -d \n | xclip -selection clipboard
Or, better yet, forget sed altogether:
printf ls | xclip -selection clipboard
answered Jan 25 '15 at 0:00
mikeservmikeserv
45.9k668160
answered Jan 25 '15 at 0:00
mikeservmikeserv
45.9k668160
answered Jan 25 '15 at 0:00
mikeservmikeserv
45.9k668160
answered Jan 25 '15 at 0:00
mikeservmikeserv
45.9k668160
45.9k668160
add a comment |
add a comment |
Many text processing tools, including sed, operate on the content of the line, excluding the newline character. The first thing sed does when processing a line is to strip off the newline at the end, then it executes the commands in the script, and it adds a final newline when printing out. So you won't be able to remove the newline with sed.
To remove all the newlines, you can use tr instead:
echo "ls" | tr -d 'n' | xclip
edited Jan 25 '15 at 18:42
JJoao
7,3591928
answered Jan 25 '15 at 0:03
GillesGilles
541k12810951611
add a comment |
Many text processing tools, including sed, operate on the content of the line, excluding the newline character. The first thing sed does when processing a line is to strip off the newline at the end, then it executes the commands in the script, and it adds a final newline when printing out. So you won't be able to remove the newline with sed.
To remove all the newlines, you can use tr instead:
echo "ls" | tr -d 'n' | xclip
edited Jan 25 '15 at 18:42
JJoao
7,3591928
answered Jan 25 '15 at 0:03
GillesGilles
541k12810951611
add a comment |
Many text processing tools, including sed, operate on the content of the line, excluding the newline character. The first thing sed does when processing a line is to strip off the newline at the end, then it executes the commands in the script, and it adds a final newline when printing out. So you won't be able to remove the newline with sed.
To remove all the newlines, you can use tr instead:
echo "ls" | tr -d 'n' | xclip
edited Jan 25 '15 at 18:42
JJoao
7,3591928
answered Jan 25 '15 at 0:03
GillesGilles
541k12810951611
Many text processing tools, including sed, operate on the content of the line, excluding the newline character. The first thing sed does when processing a line is to strip off the newline at the end, then it executes the commands in the script, and it adds a final newline when printing out. So you won't be able to remove the newline with sed.
To remove all the newlines, you can use tr instead:
echo "ls" | tr -d 'n' | xclip
edited Jan 25 '15 at 18:42
JJoao
7,3591928
answered Jan 25 '15 at 0:03
GillesGilles
541k12810951611
edited Jan 25 '15 at 18:42
JJoao
7,3591928
edited Jan 25 '15 at 18:42
JJoao
7,3591928
edited Jan 25 '15 at 18:42
JJoao
7,3591928
7,3591928
answered Jan 25 '15 at 0:03
GillesGilles
541k12810951611
answered Jan 25 '15 at 0:03
GillesGilles
541k12810951611
answered Jan 25 '15 at 0:03
GillesGilles
541k12810951611
541k12810951611
add a comment |
add a comment |
If you are just putting commands in the clipboard
echo -n "ls " | xclip -selection clipboard
If you additionally need to make more complex transformations,
echo "ls " | perl -pe 's/n//' | xclip -selection clipboard
answered Jan 25 '15 at 0:42
JJoaoJJoao
7,3591928
Hmm. Smooth solution. I guess it is perhaps time to move on to perl or python for regex.
– shivams
Jan 25 '15 at 0:49
2
@shivams -perlandpythonare both much slower thansedcan be when used correctly. Learning to use it correctly is the key, though.
– mikeserv
Jan 25 '15 at 1:26
@mikeserv - I agree; special for oneliner sed is wonderful. If the transformations are going to become more complex, then I prefer perl/python/gawk.
– JJoao
Jan 25 '15 at 12:35
@JJoa: Your preference is your own, butsedcan do far more than handle just your one-liners, and it can likely do so faster than any of those other tools you mention.
– mikeserv
Jan 25 '15 at 14:54
1
@mikeserv - once again, I agree with you. Some year ago I had a translation system EN-PT written in sed (20000 s/.../.../), generated by sed! And it worked! Later it became Perl, to have arrays, hashes, functions, packages and CPAN.
– JJoao
Jan 25 '15 at 21:10
add a comment |
If you are just putting commands in the clipboard
echo -n "ls " | xclip -selection clipboard
If you additionally need to make more complex transformations,
echo "ls " | perl -pe 's/n//' | xclip -selection clipboard
answered Jan 25 '15 at 0:42
JJoaoJJoao
7,3591928
Hmm. Smooth solution. I guess it is perhaps time to move on to perl or python for regex.
– shivams
Jan 25 '15 at 0:49
2
@shivams -perlandpythonare both much slower thansedcan be when used correctly. Learning to use it correctly is the key, though.
– mikeserv
Jan 25 '15 at 1:26
@mikeserv - I agree; special for oneliner sed is wonderful. If the transformations are going to become more complex, then I prefer perl/python/gawk.
– JJoao
Jan 25 '15 at 12:35
@JJoa: Your preference is your own, butsedcan do far more than handle just your one-liners, and it can likely do so faster than any of those other tools you mention.
– mikeserv
Jan 25 '15 at 14:54
1
@mikeserv - once again, I agree with you. Some year ago I had a translation system EN-PT written in sed (20000 s/.../.../), generated by sed! And it worked! Later it became Perl, to have arrays, hashes, functions, packages and CPAN.
– JJoao
Jan 25 '15 at 21:10
add a comment |
If you are just putting commands in the clipboard
echo -n "ls " | xclip -selection clipboard
If you additionally need to make more complex transformations,
echo "ls " | perl -pe 's/n//' | xclip -selection clipboard
answered Jan 25 '15 at 0:42
JJoaoJJoao
7,3591928
If you are just putting commands in the clipboard
echo -n "ls " | xclip -selection clipboard
If you additionally need to make more complex transformations,
echo "ls " | perl -pe 's/n//' | xclip -selection clipboard
answered Jan 25 '15 at 0:42
JJoaoJJoao
7,3591928
edited Jan 25 '15 at 12:24
answered Jan 25 '15 at 0:42
JJoaoJJoao
7,3591928
answered Jan 25 '15 at 0:42
JJoaoJJoao
7,3591928
answered Jan 25 '15 at 0:42
JJoaoJJoao
7,3591928
7,3591928
Hmm. Smooth solution. I guess it is perhaps time to move on to perl or python for regex.
– shivams
Jan 25 '15 at 0:49
2
@shivams -perlandpythonare both much slower thansedcan be when used correctly. Learning to use it correctly is the key, though.
– mikeserv
Jan 25 '15 at 1:26
@mikeserv - I agree; special for oneliner sed is wonderful. If the transformations are going to become more complex, then I prefer perl/python/gawk.
– JJoao
Jan 25 '15 at 12:35
@JJoa: Your preference is your own, butsedcan do far more than handle just your one-liners, and it can likely do so faster than any of those other tools you mention.
– mikeserv
Jan 25 '15 at 14:54
1
@mikeserv - once again, I agree with you. Some year ago I had a translation system EN-PT written in sed (20000 s/.../.../), generated by sed! And it worked! Later it became Perl, to have arrays, hashes, functions, packages and CPAN.
– JJoao
Jan 25 '15 at 21:10
add a comment |
Hmm. Smooth solution. I guess it is perhaps time to move on to perl or python for regex.
– shivams
Jan 25 '15 at 0:49
2
@shivams -perlandpythonare both much slower thansedcan be when used correctly. Learning to use it correctly is the key, though.
– mikeserv
Jan 25 '15 at 1:26
@mikeserv - I agree; special for oneliner sed is wonderful. If the transformations are going to become more complex, then I prefer perl/python/gawk.
– JJoao
Jan 25 '15 at 12:35
@JJoa: Your preference is your own, butsedcan do far more than handle just your one-liners, and it can likely do so faster than any of those other tools you mention.
– mikeserv
Jan 25 '15 at 14:54
1
@mikeserv - once again, I agree with you. Some year ago I had a translation system EN-PT written in sed (20000 s/.../.../), generated by sed! And it worked! Later it became Perl, to have arrays, hashes, functions, packages and CPAN.
– JJoao
Jan 25 '15 at 21:10
Hmm. Smooth solution. I guess it is perhaps time to move on to perl or python for regex.
– shivams
Jan 25 '15 at 0:49
Hmm. Smooth solution. I guess it is perhaps time to move on to perl or python for regex.
– shivams
Jan 25 '15 at 0:49
2
2
@shivams -
perl and python are both much slower than sed can be when used correctly. Learning to use it correctly is the key, though.– mikeserv
Jan 25 '15 at 1:26
@shivams -
perl and python are both much slower than sed can be when used correctly. Learning to use it correctly is the key, though.– mikeserv
Jan 25 '15 at 1:26
@mikeserv - I agree; special for oneliner sed is wonderful. If the transformations are going to become more complex, then I prefer perl/python/gawk.
– JJoao
Jan 25 '15 at 12:35
@mikeserv - I agree; special for oneliner sed is wonderful. If the transformations are going to become more complex, then I prefer perl/python/gawk.
– JJoao
Jan 25 '15 at 12:35
@JJoa: Your preference is your own, but
sed can do far more than handle just your one-liners, and it can likely do so faster than any of those other tools you mention.– mikeserv
Jan 25 '15 at 14:54
@JJoa: Your preference is your own, but
sed can do far more than handle just your one-liners, and it can likely do so faster than any of those other tools you mention.– mikeserv
Jan 25 '15 at 14:54
1
1
@mikeserv - once again, I agree with you. Some year ago I had a translation system EN-PT written in sed (20000 s/.../.../), generated by sed! And it worked! Later it became Perl, to have arrays, hashes, functions, packages and CPAN.
– JJoao
Jan 25 '15 at 21:10
@mikeserv - once again, I agree with you. Some year ago I had a translation system EN-PT written in sed (20000 s/.../.../), generated by sed! And it worked! Later it became Perl, to have arrays, hashes, functions, packages and CPAN.
– JJoao
Jan 25 '15 at 21:10
add a comment |
You can replace newlines in sed by passing it the -z option.
sed -z 's/n/ /g'
Sed man page:
-z, --null-data separate lines by NUL characters
answered 4 hours ago
JSON C11JSON C11
1013
New contributor
JSON C11 is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
add a comment |
You can replace newlines in sed by passing it the -z option.
sed -z 's/n/ /g'
Sed man page:
-z, --null-data separate lines by NUL characters
answered 4 hours ago
JSON C11JSON C11
1013
New contributor
JSON C11 is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
add a comment |
You can replace newlines in sed by passing it the -z option.
sed -z 's/n/ /g'
Sed man page:
-z, --null-data separate lines by NUL characters
answered 4 hours ago
JSON C11JSON C11
1013
New contributor
JSON C11 is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
You can replace newlines in sed by passing it the -z option.
sed -z 's/n/ /g'
Sed man page:
-z, --null-data separate lines by NUL characters
answered 4 hours ago
JSON C11JSON C11
1013
New contributor
JSON C11 is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
answered 4 hours ago
JSON C11JSON C11
1013
New contributor
JSON C11 is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
answered 4 hours ago
JSON C11JSON C11
1013
answered 4 hours ago
JSON C11JSON C11
1013
1013
New contributor
JSON C11 is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
New contributor
JSON C11 is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
JSON C11 is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
add a comment |
add a comment |
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-newlines, sed
