How to print new line character with echo?
I dump a string with hexdump like this 2031 3334 2e30 0a32 2032 3331 302e 000a. It is clear that 0x0a is new line character, however, when I try to echo this string out, I always got 1 430.2 2 13.0 -- the new line is replaced with a space, even I use the -e flag.
What may be the problem? Does the tailing ruin the output? Is there any alternatives to print 0x0a a new line?
Thanks and Best regards.
bash shell shell-script newlines echo
asked Jul 2 '12 at 13:27
Summer_More_More_TeaSummer_More_More_Tea
5135927
add a comment |
I dump a string with hexdump like this 2031 3334 2e30 0a32 2032 3331 302e 000a. It is clear that 0x0a is new line character, however, when I try to echo this string out, I always got 1 430.2 2 13.0 -- the new line is replaced with a space, even I use the -e flag.
What may be the problem? Does the tailing ruin the output? Is there any alternatives to print 0x0a a new line?
Thanks and Best regards.
bash shell shell-script newlines echo
asked Jul 2 '12 at 13:27
Summer_More_More_TeaSummer_More_More_Tea
5135927
when I try to echo this string out How exactly do you do that? What is the exact command you use?
– Dennis
Jul 2 '12 at 19:01
@Dennis I meanecho -e. Thanks, I find a solution.
– Summer_More_More_Tea
Jul 3 '12 at 2:00
the preferred solution is just to useprintf "...n"instead ofecho.
– michael
May 3 '15 at 8:04
stackoverflow.com/questions/8467424/…
– Ciro Santilli 新疆改造中心 六四事件 法轮功
Jan 23 '16 at 23:14
add a comment |
I dump a string with hexdump like this 2031 3334 2e30 0a32 2032 3331 302e 000a. It is clear that 0x0a is new line character, however, when I try to echo this string out, I always got 1 430.2 2 13.0 -- the new line is replaced with a space, even I use the -e flag.
What may be the problem? Does the tailing ruin the output? Is there any alternatives to print 0x0a a new line?
Thanks and Best regards.
bash shell shell-script newlines echo
asked Jul 2 '12 at 13:27
Summer_More_More_TeaSummer_More_More_Tea
5135927
I dump a string with hexdump like this 2031 3334 2e30 0a32 2032 3331 302e 000a. It is clear that 0x0a is new line character, however, when I try to echo this string out, I always got 1 430.2 2 13.0 -- the new line is replaced with a space, even I use the -e flag.
What may be the problem? Does the tailing ruin the output? Is there any alternatives to print 0x0a a new line?
Thanks and Best regards.
bash shell shell-script newlines echo
bash shell shell-script newlines echo
asked Jul 2 '12 at 13:27
Summer_More_More_TeaSummer_More_More_Tea
5135927
asked Jul 2 '12 at 13:27
Summer_More_More_TeaSummer_More_More_Tea
5135927
edited Jul 3 '12 at 2:12
Summer_More_More_Tea
asked Jul 2 '12 at 13:27
Summer_More_More_TeaSummer_More_More_Tea
5135927
asked Jul 2 '12 at 13:27
Summer_More_More_TeaSummer_More_More_Tea
5135927
asked Jul 2 '12 at 13:27
Summer_More_More_TeaSummer_More_More_Tea
5135927
5135927
when I try to echo this string out How exactly do you do that? What is the exact command you use?
– Dennis
Jul 2 '12 at 19:01
@Dennis I meanecho -e. Thanks, I find a solution.
– Summer_More_More_Tea
Jul 3 '12 at 2:00
the preferred solution is just to useprintf "...n"instead ofecho.
– michael
May 3 '15 at 8:04
stackoverflow.com/questions/8467424/…
– Ciro Santilli 新疆改造中心 六四事件 法轮功
Jan 23 '16 at 23:14
add a comment |
when I try to echo this string out How exactly do you do that? What is the exact command you use?
– Dennis
Jul 2 '12 at 19:01
@Dennis I meanecho -e. Thanks, I find a solution.
– Summer_More_More_Tea
Jul 3 '12 at 2:00
the preferred solution is just to useprintf "...n"instead ofecho.
– michael
May 3 '15 at 8:04
stackoverflow.com/questions/8467424/…
– Ciro Santilli 新疆改造中心 六四事件 法轮功
Jan 23 '16 at 23:14
when I try to echo this string out How exactly do you do that? What is the exact command you use?
– Dennis
Jul 2 '12 at 19:01
when I try to echo this string out How exactly do you do that? What is the exact command you use?
– Dennis
Jul 2 '12 at 19:01
@Dennis I mean
echo -e. Thanks, I find a solution.– Summer_More_More_Tea
Jul 3 '12 at 2:00
@Dennis I mean
echo -e. Thanks, I find a solution.– Summer_More_More_Tea
Jul 3 '12 at 2:00
the preferred solution is just to use
printf "...n" instead of echo.– michael
May 3 '15 at 8:04
the preferred solution is just to use
printf "...n" instead of echo.– michael
May 3 '15 at 8:04
stackoverflow.com/questions/8467424/…
– Ciro Santilli 新疆改造中心 六四事件 法轮功
Jan 23 '16 at 23:14
stackoverflow.com/questions/8467424/…
– Ciro Santilli 新疆改造中心 六四事件 法轮功
Jan 23 '16 at 23:14
add a comment |
3 Answers
3
active
oldest
votes
The new line character with the echo command is "n". Taking the following example:
echo -e "This is line 1nThis is line 2"
Would result in the output
This is line 1
This is line 2
The "-e" parameter is important here.
answered Jul 2 '12 at 13:33
IzzyIzzy
2,97521930
3
btw, this"echo -e ..."relies on bash's echo to work correctly (e.g.,dashwill just print the "-e"); but '/bin/echo' may (or may not) also work. Unfortunately (perhaps appropriately), there are a lot of echo's around, and you don't really want to care about which one you're going to get. Using'printf "....n"is a more portable option across env's and shells.
– michael
May 3 '15 at 8:03
@michael_n which is what the OP finally reverted too, in fact. But the question was explicitely stating "with echo" – hence my answer this way. Anyhow, it was not "with Bash" – so thanks for your pointing out those differences!
– Izzy
May 4 '15 at 9:28
add a comment |
POSIX 7 says you can't
http://pubs.opengroup.org/onlinepubs/9699919799/utilities/echo.html
-e is not defined and backslashes are implementation defined:
If the first operand is -n, or if any of the operands contain a <backslash> character, the results are implementation-defined.
unless you have an optional XSI extension.
So use printf instead:
format operand shall be used as the format string described in XBD File Format Notation [...]
the File Format Notation:
n <newline> Move the printing position to the start of the next line.
Also keep in mind that Ubuntu 15.10 and most distros implement echo both as:
- a Bash built-in:
help echo
- a standalone executable:
which echo
which can lead to some confusion.
answered Jan 23 '16 at 23:11
Ciro Santilli 新疆改造中心 六四事件 法轮功Ciro Santilli 新疆改造中心 六四事件 法轮功
4,06622735
add a comment |
I finally properly format this string with printf "$string". Thank you all.
answered Jul 3 '12 at 2:02
Summer_More_More_TeaSummer_More_More_Tea
5135927
add a comment |
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3 Answers
3
active
oldest
votes
3 Answers
3
active
oldest
votes
active
oldest
votes
active
oldest
votes
The new line character with the echo command is "n". Taking the following example:
echo -e "This is line 1nThis is line 2"
Would result in the output
This is line 1
This is line 2
The "-e" parameter is important here.
answered Jul 2 '12 at 13:33
IzzyIzzy
2,97521930
3
btw, this"echo -e ..."relies on bash's echo to work correctly (e.g.,dashwill just print the "-e"); but '/bin/echo' may (or may not) also work. Unfortunately (perhaps appropriately), there are a lot of echo's around, and you don't really want to care about which one you're going to get. Using'printf "....n"is a more portable option across env's and shells.
– michael
May 3 '15 at 8:03
@michael_n which is what the OP finally reverted too, in fact. But the question was explicitely stating "with echo" – hence my answer this way. Anyhow, it was not "with Bash" – so thanks for your pointing out those differences!
– Izzy
May 4 '15 at 9:28
add a comment |
The new line character with the echo command is "n". Taking the following example:
echo -e "This is line 1nThis is line 2"
Would result in the output
This is line 1
This is line 2
The "-e" parameter is important here.
answered Jul 2 '12 at 13:33
IzzyIzzy
2,97521930
3
btw, this"echo -e ..."relies on bash's echo to work correctly (e.g.,dashwill just print the "-e"); but '/bin/echo' may (or may not) also work. Unfortunately (perhaps appropriately), there are a lot of echo's around, and you don't really want to care about which one you're going to get. Using'printf "....n"is a more portable option across env's and shells.
– michael
May 3 '15 at 8:03
@michael_n which is what the OP finally reverted too, in fact. But the question was explicitely stating "with echo" – hence my answer this way. Anyhow, it was not "with Bash" – so thanks for your pointing out those differences!
– Izzy
May 4 '15 at 9:28
add a comment |
The new line character with the echo command is "n". Taking the following example:
echo -e "This is line 1nThis is line 2"
Would result in the output
This is line 1
This is line 2
The "-e" parameter is important here.
answered Jul 2 '12 at 13:33
IzzyIzzy
2,97521930
The new line character with the echo command is "n". Taking the following example:
echo -e "This is line 1nThis is line 2"
Would result in the output
This is line 1
This is line 2
The "-e" parameter is important here.
answered Jul 2 '12 at 13:33
IzzyIzzy
2,97521930
answered Jul 2 '12 at 13:33
IzzyIzzy
2,97521930
answered Jul 2 '12 at 13:33
IzzyIzzy
2,97521930
answered Jul 2 '12 at 13:33
IzzyIzzy
2,97521930
2,97521930
3
btw, this"echo -e ..."relies on bash's echo to work correctly (e.g.,dashwill just print the "-e"); but '/bin/echo' may (or may not) also work. Unfortunately (perhaps appropriately), there are a lot of echo's around, and you don't really want to care about which one you're going to get. Using'printf "....n"is a more portable option across env's and shells.
– michael
May 3 '15 at 8:03
@michael_n which is what the OP finally reverted too, in fact. But the question was explicitely stating "with echo" – hence my answer this way. Anyhow, it was not "with Bash" – so thanks for your pointing out those differences!
– Izzy
May 4 '15 at 9:28
add a comment |
3
btw, this"echo -e ..."relies on bash's echo to work correctly (e.g.,dashwill just print the "-e"); but '/bin/echo' may (or may not) also work. Unfortunately (perhaps appropriately), there are a lot of echo's around, and you don't really want to care about which one you're going to get. Using'printf "....n"is a more portable option across env's and shells.
– michael
May 3 '15 at 8:03
@michael_n which is what the OP finally reverted too, in fact. But the question was explicitely stating "with echo" – hence my answer this way. Anyhow, it was not "with Bash" – so thanks for your pointing out those differences!
– Izzy
May 4 '15 at 9:28
3
3
btw, this
"echo -e ..." relies on bash's echo to work correctly (e.g., dash will just print the "-e"); but '/bin/echo' may (or may not) also work. Unfortunately (perhaps appropriately), there are a lot of echo's around, and you don't really want to care about which one you're going to get. Using 'printf "....n" is a more portable option across env's and shells.– michael
May 3 '15 at 8:03
btw, this
"echo -e ..." relies on bash's echo to work correctly (e.g., dash will just print the "-e"); but '/bin/echo' may (or may not) also work. Unfortunately (perhaps appropriately), there are a lot of echo's around, and you don't really want to care about which one you're going to get. Using 'printf "....n" is a more portable option across env's and shells.– michael
May 3 '15 at 8:03
@michael_n which is what the OP finally reverted too, in fact. But the question was explicitely stating "with echo" – hence my answer this way. Anyhow, it was not "with Bash" – so thanks for your pointing out those differences!
– Izzy
May 4 '15 at 9:28
@michael_n which is what the OP finally reverted too, in fact. But the question was explicitely stating "with echo" – hence my answer this way. Anyhow, it was not "with Bash" – so thanks for your pointing out those differences!
– Izzy
May 4 '15 at 9:28
add a comment |
POSIX 7 says you can't
http://pubs.opengroup.org/onlinepubs/9699919799/utilities/echo.html
-e is not defined and backslashes are implementation defined:
If the first operand is -n, or if any of the operands contain a <backslash> character, the results are implementation-defined.
unless you have an optional XSI extension.
So use printf instead:
format operand shall be used as the format string described in XBD File Format Notation [...]
the File Format Notation:
n <newline> Move the printing position to the start of the next line.
Also keep in mind that Ubuntu 15.10 and most distros implement echo both as:
- a Bash built-in:
help echo
- a standalone executable:
which echo
which can lead to some confusion.
answered Jan 23 '16 at 23:11
Ciro Santilli 新疆改造中心 六四事件 法轮功Ciro Santilli 新疆改造中心 六四事件 法轮功
4,06622735
add a comment |
POSIX 7 says you can't
http://pubs.opengroup.org/onlinepubs/9699919799/utilities/echo.html
-e is not defined and backslashes are implementation defined:
If the first operand is -n, or if any of the operands contain a <backslash> character, the results are implementation-defined.
unless you have an optional XSI extension.
So use printf instead:
format operand shall be used as the format string described in XBD File Format Notation [...]
the File Format Notation:
n <newline> Move the printing position to the start of the next line.
Also keep in mind that Ubuntu 15.10 and most distros implement echo both as:
- a Bash built-in:
help echo
- a standalone executable:
which echo
which can lead to some confusion.
answered Jan 23 '16 at 23:11
Ciro Santilli 新疆改造中心 六四事件 法轮功Ciro Santilli 新疆改造中心 六四事件 法轮功
4,06622735
add a comment |
POSIX 7 says you can't
http://pubs.opengroup.org/onlinepubs/9699919799/utilities/echo.html
-e is not defined and backslashes are implementation defined:
If the first operand is -n, or if any of the operands contain a <backslash> character, the results are implementation-defined.
unless you have an optional XSI extension.
So use printf instead:
format operand shall be used as the format string described in XBD File Format Notation [...]
the File Format Notation:
n <newline> Move the printing position to the start of the next line.
Also keep in mind that Ubuntu 15.10 and most distros implement echo both as:
- a Bash built-in:
help echo
- a standalone executable:
which echo
which can lead to some confusion.
answered Jan 23 '16 at 23:11
Ciro Santilli 新疆改造中心 六四事件 法轮功Ciro Santilli 新疆改造中心 六四事件 法轮功
4,06622735
POSIX 7 says you can't
http://pubs.opengroup.org/onlinepubs/9699919799/utilities/echo.html
-e is not defined and backslashes are implementation defined:
If the first operand is -n, or if any of the operands contain a <backslash> character, the results are implementation-defined.
unless you have an optional XSI extension.
So use printf instead:
format operand shall be used as the format string described in XBD File Format Notation [...]
the File Format Notation:
n <newline> Move the printing position to the start of the next line.
Also keep in mind that Ubuntu 15.10 and most distros implement echo both as:
- a Bash built-in:
help echo
- a standalone executable:
which echo
which can lead to some confusion.
answered Jan 23 '16 at 23:11
Ciro Santilli 新疆改造中心 六四事件 法轮功Ciro Santilli 新疆改造中心 六四事件 法轮功
4,06622735
answered Jan 23 '16 at 23:11
Ciro Santilli 新疆改造中心 六四事件 法轮功Ciro Santilli 新疆改造中心 六四事件 法轮功
4,06622735
answered Jan 23 '16 at 23:11
Ciro Santilli 新疆改造中心 六四事件 法轮功Ciro Santilli 新疆改造中心 六四事件 法轮功
4,06622735
answered Jan 23 '16 at 23:11
Ciro Santilli 新疆改造中心 六四事件 法轮功Ciro Santilli 新疆改造中心 六四事件 法轮功
4,06622735
4,06622735
add a comment |
add a comment |
I finally properly format this string with printf "$string". Thank you all.
answered Jul 3 '12 at 2:02
Summer_More_More_TeaSummer_More_More_Tea
5135927
add a comment |
I finally properly format this string with printf "$string". Thank you all.
answered Jul 3 '12 at 2:02
Summer_More_More_TeaSummer_More_More_Tea
5135927
add a comment |
I finally properly format this string with printf "$string". Thank you all.
answered Jul 3 '12 at 2:02
Summer_More_More_TeaSummer_More_More_Tea
5135927
I finally properly format this string with printf "$string". Thank you all.
answered Jul 3 '12 at 2:02
Summer_More_More_TeaSummer_More_More_Tea
5135927
answered Jul 3 '12 at 2:02
Summer_More_More_TeaSummer_More_More_Tea
5135927
answered Jul 3 '12 at 2:02
Summer_More_More_TeaSummer_More_More_Tea
5135927
answered Jul 3 '12 at 2:02
Summer_More_More_TeaSummer_More_More_Tea
5135927
5135927
add a comment |
add a comment |
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when I try to echo this string out How exactly do you do that? What is the exact command you use?
– Dennis
Jul 2 '12 at 19:01
@Dennis I mean
echo -e. Thanks, I find a solution.– Summer_More_More_Tea
Jul 3 '12 at 2:00
the preferred solution is just to use
printf "...n"instead ofecho.– michael
May 3 '15 at 8:04
stackoverflow.com/questions/8467424/…
– Ciro Santilli 新疆改造中心 六四事件 法轮功
Jan 23 '16 at 23:14