在外壳程序脚本中使用sed用反斜杠替换一行

Question

I am trying to replace the bottom one of these 2 lines with sed in a file.

    <rule>out_prefix=orderid ^1\\d\+ updatemtnotif/</rule>\n\
    <rule>out_prefix=orderid ^2\\d\+ updatemtnotif/</rule>\n\

And the following command seems to do that when executed as a command at the bash prompt

sed -i 's@out_prefix=orderid ^2\\\\d\\+ updatemtnotif/@out_prefix=orderid ^2\\\\d\\+ updatemtnotif_fr/@g' /opt/temp/rules.txt

however, when I try to execute the same command remotely over ssh using here documents, the command fails to modify the file. I think this is probably an escaping issue, but I have had no luck trying to modify the command in numerous ways. Can any one tell me what should I do to get it working over ssh? Thanks in advance!

to clarify,

input: <rule>out_prefix=orderid ^2\\d\+ updatemtnotif/</rule>\n\
output: <rule>out_prefix=orderid ^2\\d\+ updatemtnotif_fr/</rule>\n\

Answer 1

You can use it with ssh and heredoc like this:

ssh -t -t user@localhost<<'EOF'
sed 's~out_prefix=orderid ^2\\\\d\\+ updatemtnotif/~out_prefix=orderid ^2\\\\d\\+ updatemtnotif_fr/~' ~/path/to/file
exit
EOF

PS: It is important to quote the 'EOF' as shown.

Answer 2

I managed to fix it. had to escape the backslashes in the command I used inside the shell script.

 's@out_prefix=orderid ^2\\\\\\\\d\\\\+ updatemtnotif/@out_prefix=orderid ^2\\\\\\\\d\\\\+ updatemtnotif_fr/@g' /opt/temp/rules.txt

That's a whole lot of backslashes but it did the trick.