Once upon a time, Mike Wright <nob...@nospam.hostisimo.com> said: > I have a set of dns zone text files in "bind" format. On the fourth > line there is a 10 digit timestamp (ignoring white space, the first > field). There is no way to predetermine the value so search and > replace by value is a no go and seems to require some positional > approach such as "line 4, first 10 digit field". > > What is the easiest way to replace each of them with the same value, > $(date +%s) ?
The BIND zone file format is very unfriendly for easy script changes unfortunately. The easiest way (without a full parser) to do it is to find the existing value by generating a well-known format of the file; for example, named-checkzone (from bind-utils) can dump a "canonical" format of a zone, which you can then grep out the SOA record and get the current serial number. Then you can do the basic search-and-replace approach, although that can be a problem too (for example, 1 is a valid serial, and you don't want to s/1/1234/ and replace all instances of "1"). -- Chris Adams <li...@cmadams.net> _______________________________________________ users mailing list -- users@lists.fedoraproject.org To unsubscribe send an email to users-le...@lists.fedoraproject.org Fedora Code of Conduct: https://getfedora.org/code-of-conduct.html List Guidelines: https://fedoraproject.org/wiki/Mailing_list_guidelines List Archives: https://lists.fedoraproject.org/archives/list/users@lists.fedoraproject.org
