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smj10j/find-error-occurences.sh

Created December 8, 2014 15:35
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Bash one-liners to find first and last occurences of errors in server logs
Raw
find-error-occurences.sh
# find the first occurrence of each Fatal error
grep "Fatal" combined | awk '{FS="(error: )|( in \/mnt)|( - \/mnt)"} {errors[$2]=$0} END {for(i in errors) print errors[i]}'
# find the last occurrence of each fatal error
grep "Fatal" <(tac combined) | awk '{FS="(error: )|( in \/mnt)|( - \/mnt)"} {errors[$2]=$0} END {for(i in errors) print errors[i]}'
# find the first occurence of each fatal error, sorted by date
grep "Fatal" combined | awk '{FS="(error: )|( in \/mnt)|( - \/mnt)"} {errors[$2]=$0} END {for(i in errors) print errors[i]}' | sort -k1 | egrep "^2014[^a-z]+ "
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