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- You want to compare 2 streams, with byte offset and line numbers?
- Pull off content with a byte offset?
- Display lines before or after a pattern?
- Send an email - upon job failure?
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md5sum TARBALL | awk '{print $1;}' | cmp - TARBALL.md5 # cmp good for comparing output with file contents, or diffing files. Outputs byte offset and line number. md5sum creates a hash (checksum) of file. dd bs=1 skip=106 if=infile # disk to disk copy, example outputs infile with offset of 106 bytes (block size of 1 byte, skip 106 bytes). - Ever needed to display a line before or after a pattern. Yep sure you can use Perl, but this is a bit simplier to work out.
See the code here See a run through screen shot here Usage - ppgrep #1 #2 pattern file - where #1 is the number of lines prior to the pattern (could be 0) and #2 is number of lines post pattern. - Sending email upon UNIX cron failure
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See the examples.