| https://serverfault.com/questions/340837/how-to-delete-all-but-last-n-zfs-snapshots#340846 | |
| You may find something like this a little simpler | |
| zfs list -t snapshot -o name | grep ^tank@Auto | tac | tail -n +16 | xargs -n 1 zfs destroy -r | |
| output the list of snapshot (names only) with zfs list -t snaphot -o name | |
| filter to keep only the ones that match tank@Auto with grep ^tank@Auto | |
| reverse the list (previously sorted from oldest to newest) with tac | |
| limit output to the 16th oldest result and following with tail -n +16 |
| # LVDB - LLOOGG Memory DB | |
| # Copyriht (C) 2009 Salvatore Sanfilippo <antirez@gmail.com> | |
| # All Rights Reserved | |
| # TODO | |
| # - cron with cleanup of timedout clients, automatic dump | |
| # - the dump should use array startsearch to write it line by line | |
| # and may just use gets to read element by element and load the whole state. | |
| # - 'help','stopserver','saveandstopserver','save','load','reset','keys' commands. | |
| # - ttl with milliseconds resolution 'ttl a 1000'. Check ttl in dump! |
| var pg = require('pg'); | |
| var client = new pg.Client('postgresql://username:password@localhost:5432/labs'); | |
| client.connect(); | |
| client.query('LISTEN events', function(err, msg) { | |
| if (err) throw err; | |
| }); |
List of oldest supported version of top 10 Linux Distros and their glibc version according to distrowatch.com.
Out of all versions with published EOLs, 2.12 is the oldest glibc still active, found in CentOS 6.8.
If CentOS 6 and 7 are eliminated, the oldest glibc is 2.23 in Ubuntu and Slackware.
| Relay | Apollo | |
|---|---|---|
| Built by | Facebook (Check out the project on GitHub) | Meteor (Check out the project on GitHub) |
| Frontend Technologies | Requires React / React Native and configuration of Babel plugin | Framework and platform agnostic (works with any JS framework such as React, Angular or Vue as well as on the native mobile platforms) |
| GraphQL API | Requires a certain structure in the GraphQL schema | Works with any GraphQL schema |
| Complexity | Slow learning curve: Lots of powerful magic happening behind the scenes | Low entrance barrier: Let's you get started quickly and involves more manual work for certain features |
| Flexibility | Almost no flexibility, strict rules how to |
| package main | |
| import ( | |
| "crypto/tls" | |
| "golang.org/x/crypto/acme/autocert" | |
| "log" | |
| "net" | |
| "net/http" | |
| ) |
To use the most modern version of Postgres software we need to add postgresql repository. Edit /etc/apt/sources.list or create /etc/apt/sources.list.d/pgdg.list and add there a line: deb http://apt.postgresql.org/pub/repos/apt/ jessie-pgdg main
Then import the repository signing key, and update the package lists:
wget --quiet -O - https://www.postgresql.org/media/keys/ACCC4CF8.asc | sudo apt-key add -
sudo apt-get updateInstall a new version of PostgreSQL server.
Once the Debian upgrade finished, I used dpkg-query -l postgresql* to check which versions of postgres I have installed.
| # Backup | |
| docker exec CONTAINER /usr/bin/mysqldump -u root --password=root DATABASE > backup.sql | |
| # Restore | |
| cat backup.sql | docker exec -i CONTAINER /usr/bin/mysql -u root --password=root DATABASE | |
You got your hands on some data that was leaked from a social network and you want to help the poor people.
Luckily you know a government service to automatically block a list of credit cards.
The service is a little old school though and you have to upload a CSV file in the exact format. The upload fails if the CSV file contains invalid data.
The CSV files should have two columns, Name and Credit Card. Also, it must be named after the following pattern:
YYYYMMDD.csv.
Rich Hickey • 3 years ago
Sorry, I have to disagree with the entire premise here.
A wide variety of experiences might lead to well-roundedness, but not to greatness, nor even goodness. By constantly switching from one thing to another you are always reaching above your comfort zone, yes, but doing so by resetting your skill and knowledge level to zero.
Mastery comes from a combination of at least several of the following: