Run sed on every Rust source file in a directory (GNU):
find . -type f -name '*.rs' -exec sed -i 's/\(DataflowDesc::new(\)None/\1/' {} \;
Above for BSD:
find . -type f -name '*.rs' -exec sed -i '' 's/\(DataflowDesc::new(\)None/\1/' {} \;
Convert a Unix timestamp to a local date/time (GNU):
date -d @1571862547
Above for BSD:
date -r 1571862547
Get number of CPUs (BSD):
sysctl hw.ncpu
Get all the nodes watched in an inotify instance (GNU/Linux):
for f in $(cat fdinfo/6 | perl -ne 'if (/ino:([0-9a-f]*)/) { print hex $1 ; print "\n" }'); do
sudo debugfs -R "ncheck $f" /dev/nvme0n1p1 2>/dev/null | awk 'BEGIN {d=1} {d=!d; if (d) {print $0}}'
done
Check what package owns a file:
pacman -Qo `which tail`
Checkout the source for a a package:
asp checkout coreutils
Find files associated with a given package:
dpkg-query -L <package>
Renew LetsEncrypt certificate:
certbot-3.6 renew service dovecot onerestart service nginx onerestart # And whatever else you might need to restart...
Install patches:
freebsd-update fetch freebsd-update install
Blow away a bunch of stuff (caches, unused volumes, etc):
docker system prune -a && docker volume prune
| Service | Port |
|---|---|
| Confluent Schema Registry | 8081 |
| Zookeeper | 2181 |
| Kafka | 9092 |
| SMTP | 25 |
| SMTPS | 465 |
| SMTP submission | 587 |
| IMAP | 143 |
| IMAPS | 993 |
| Confluent Control Center | 9021 |
Render Graphviz graph:
dot -T pdf < graph.dot > graph.pdf
Render this file:
rst2html < howtodo.rst > howtodo.html