Grep through all log files, compressed and otherwise.

grep-logs.sh

# Let's say you've got some log files that look like this:

#   my.log
#   my.log.1
#   my.log.2.gz
#   my.log.3.gz
 
# To seach for text across all log files, just do this:

find . -name "my.log*" -exec zcat "{}" + | grep 'log line text'