[Shell] modifying XML content

It is easier to parse and modify XML using python, but if it is not convenient to use python, you can simply replace it with the SED command

For example, to replace the value of the port number in the following line:

<Param name = "ftpport"> 21 </param>

You can use:

New_port = "22" sed '/\ <ftpport \>/S/[0-9] \ {2, 5 \}/' "$ new_port" '/'old. XML> New. XML

Note:

<And> used to match word boundaries.

S indicates replacing the matched rows.

[0-9] {2, 5} indicates that the replaced source is 2 ~ 5-digit, which is a regular expression

Of course, for some characters with special meanings in shell, add \ escape and pass it to SED

'"$ New_port"' uses a shell tip to pass the variable value to sed. Make sure that the port is replaced with 22 instead of the $ new_port string, you can try to remove the four quotation marks before and after $ new_port.