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$ find . -name '*.log' -mtime -2 -exec grep -Hc Exception {} \; | grep -v :0$
July 19, 2014, 7:53 a.m.
—
Janos
Explanation
The find:
-name '*.log' -- match files ending with .log-mtime -2 -- match files modified within the last 2 days-exec CMD ARGS \; -- for each file found, execute command, where {} in ARGS will be replaced with the file's path
The grep:
-c is to print the count of the matches instead of the matches themselves-H is to print the name of the file, as grep normally won't print it when there is only one filename argument- The output lines will be in the format
path:count. Files that didn't match "Exception" will still be printed, with 0 as count
- The second
grep filters the output of the first, excluding lines that end with :0 (= the files that didn't contain matches)
Extra tips:
- Change "Exception" to the typical relevant failure indicator of your application
- Add
-i for grep to make the search case insensitive
- To make the
find match strictly only files, add -type f
- Schedule this as a periodic job, and pipe the output to a mailer, for example
| mailx -s 'error counts' yourmail@example.com
Limitations
The -H flag of grep may not work in older operating systems, for example older Solaris. In that case use ggrep (GNU grep) instead, if it exists.
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