- By Edmond Lau
- Highly Recommended 👍
- http://www.theeffectiveengineer.com
- They are the people who get things done. Effective Engineers produce results.
#!/bin/sh | |
# /etc/NetworkManager/dispatcher.d/pre-up.d/randomize-mac-addresses | |
# Configure every saved WiFi connection in NetworkManager with a spoofed MAC | |
# address, seeded from the UUID of the connection and the date eg: | |
# 'c31bbcc4-d6ad-11e7-9a5a-e7e1491a7e20-2017-11-20' | |
# This makes your MAC impossible(?) to track across WiFi providers, and | |
# for one provider to track across days. |
ּ_בּ | |
בּ_בּ | |
טּ_טּ | |
כּ‗כּ | |
לּ_לּ | |
מּ_מּ | |
סּ_סּ | |
תּ_תּ | |
٩(×̯×)۶ | |
٩(̾●̮̮̃̾•̃̾)۶ |
#!/bin/bash | |
# bash generate random alphanumeric string | |
# | |
# bash generate random 32 character alphanumeric string (upper and lowercase) and | |
NEW_UUID=$(cat /dev/urandom | tr -dc 'a-zA-Z0-9' | fold -w 32 | head -n 1) | |
# bash generate random 32 character alphanumeric string (lowercase only) | |
cat /dev/urandom | tr -dc 'a-zA-Z0-9' | fold -w 32 | head -n 1 |
Disclaimer: This piece is written anonymously. The names of a few particular companies are mentioned, but as common examples only.
This is a short write-up on things that I wish I'd known and considered before joining a private company (aka startup, aka unicorn in some cases). I'm not trying to make the case that you should never join a private company, but the power imbalance between founder and employee is extreme, and that potential candidates would
L1 cache reference ......................... 0.5 ns
Branch mispredict ............................ 5 ns
L2 cache reference ........................... 7 ns
Mutex lock/unlock ........................... 25 ns
Main memory reference ...................... 100 ns
Compress 1K bytes with Zippy ............. 3,000 ns = 3 µs
Send 2K bytes over 1 Gbps network ....... 20,000 ns = 20 µs
SSD random read ........................ 150,000 ns = 150 µs
Read 1 MB sequentially from memory ..... 250,000 ns = 250 µs
; Sample supervisor config file. | |
[unix_http_server] | |
file=/tmp/supervisor.sock ; (the path to the socket file) | |
;chmod=0700 ; sockef file mode (default 0700) | |
;chown=nobody:nogroup ; socket file uid:gid owner | |
;username=user ; (default is no username (open server)) | |
;password=123 ; (default is no password (open server)) | |
;[inet_http_server] ; inet (TCP) server disabled by default |
/* Useful celery config. | |
app = Celery('tasks', | |
broker='redis://localhost:6379', | |
backend='redis://localhost:6379') | |
app.conf.update( | |
CELERY_TASK_RESULT_EXPIRES=3600, | |
CELERY_QUEUES=( | |
Queue('default', routing_key='tasks.#'), |
Edward Snowden answered questioned after a showing of CITIZENFOUR at the IETF93 meeting; this is a transcript of the video recording.
For more information, see the Internet Society article.
WITH RECURSIVE | |
x(i) AS ( VALUES (0) | |
UNION ALL SELECT i + 1 | |
FROM x | |
WHERE i < 101), | |
Z(Ix, Iy, Cx, Cy, X, Y, I) AS ( | |
SELECT | |
Ix, | |
Iy, | |
X :: FLOAT, |