I would like to monitor my
/var/log/syslog continuously. However while monitoring, I would like to avoid certain pattern(s) while monitoring. I am interested only in the last 15 (for example) lines.
For the usual monitoring I use the command:
watch -n 1 tail -n 15 /var/log/syslog
Whereas, what I actually would like to have is something like:
watch -n 1 tail -n 15 /var/log/syslog | grep -v -E 'pattern1|pattern2'
Being more specific with my requirement:
I would like to continuously monitor entries in the
syslog, avoiding certain pattern(s). The screen should get refreshed every fixed period (say 1s or 2s).
Following are more (failed) attempts:
watch cat /var/log/syslog | grep -v -E 'pattern1|pattern2'
A (partially) successful attempt:
while true; do clear; cat /var/log/syslog | grep -v -E 'pattern1|pattern2' | tail -15; sleep 1; echo '\"CTRL-C\" to close'; done
However the smoothness of
watch is lost here.
So the question is is there any way to combine
I am using
bash 4.4.7 on 17.04.