Random Tech Ramblings

tail -f /path/to/log/file | pv -l -i 10 -r > /dev/null pv options user: -l count lines -i10 refresh every 10 seconds -r display rate counter

Logging Filter by request host header varnishlog -q 'ReqHeader ~ "Host: example.com"' Filter by request url varnishlog -q 'ReqURL ~ "^/some/path"' Filter by client IP (behind reverse proxy) varnishlog -q 'ReqHeader ~ "X-Real-IP: .*123.123.123.123"' Filter by request host header and show request URL and referrer header varnishlog -q 'ReqHeader ~ "Host: (www\.)?example\.com"' -i "ReqURL" -I "ReqHeader:Referrer:" Admin Purge Cache varnishadm 'ban req.url ~ "^/some/path/"' Show VCLs varnishadm vcl.list Show backends varnishadm backend.list