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UGU: Unix Guru Universe - Unix Tip #4291- December 10, 2012
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Unix Tip #4291- December 10, 2012
TAIL WITH COLOR
Here is how to monitor a growing
file and have it highlight a
KEYWORD:
$ tail -f FILE | perl -pe 's/KEYWORD/\e[1;31;43m$&\e[0m/g'
Replace FILE with the file to tail
Replace KEYWORD with the word to highlight.
0 : all attributes off
1 : bold
31 : foreground red
43 : background yellow
"keyword", of course, can be any perl regular expression:
(foo|bar) - highlight the strings foo and bar
\b((foo|bar)\b - highlight the words foo and bar
.*\b((foo|bar)\b.* - highlight the whole line that contains the words foo or bar
NOTE: All tips provided are USE AT YOUR OWN RISK. Tips are submitted
by various unix admins around the globe. UGU suggest you read and
test each tip in a non-volitile environment before placing into
production.
LAST 5 TIPS
4290
- MERGING TWO FILES
4289
- BACKING UP PASSWORDS
4288
- DIFFERENCES WITHOUT USING DIFF
4287
- WHAT AM I LISTENING FOR?
4286
- HIDING ECHO
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