Super User Asked by TheSavo on December 17, 2020
I am attempting to use SED for the first time. To complicate matters, I am using it in Windows. I downloaded from this source. Since I don’t have installation privileges on my work machine, I created a folder in my profile for executables and added it to my PATH
.
I am having issues trying to use SED for the first time. It keeps failing with the error:
sed: -e expression #1, char 1: unknown command: `''
I have tried a few different samples from this how to, but I just can’t get it. I found noone else is having this problem. What should I try? I have tried encapsulating it in quotes, double quotes, and back-quotes. Nothing seems to help.
C:>sed sdf
sed: -e expression #1, char 3: Unterminated `s' command
C:>echo aaa > f
C:>sed -e "s/a/x/" < f
xaa
This is using sed
from unxutils
Correct answer by RedGrittyBrick on December 17, 2020
Unlike the Unixes, the Windows command-line shell does not perform any word-splitting and does not strip away the quotes; the program just receives a single string containing the entire command line. This means that not all programs can follow the same quoting rules.
In this case, the GnuWin32 version of sed only supports one quoting style – "
double quotes "
. For example, in my tests the following works fine:
sed "s/foo/bar/"
You can also get sed
from Cygwin, along with a more-complete Unix-like system: shells, editors, other tools. It will be easier if you use a Unix shell for learning, to avoid such syntax issues in the future.
Answered by user1686 on December 17, 2020
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