awk: warning: escape sequence ‘\<' treated as plain '>‘

The “awk: warning: escape sequence ‘<‘ treated as plain ‘>'” error message is produced by the awk command when it encounters an escape sequence in a string that it does not recognize. In this case, the escape sequence \< is being interpreted as >, which can cause unexpected results in your script.

To resolve this issue, you can either remove the escape sequence or use a different escape sequence that awk recognizes. For example, you can use the \x3C escape sequence to represent the < character:

You can also use single quotes instead of double quotes to avoid the need to escape characters:

Note that the specific escape sequences and syntax used in awk may depend on the implementation and version of awk you are using. Be sure to consult the awk documentation for more information on the available escape sequences and syntax.