nukemberg

# vim: ft=sh:ts=4:sw=4:autoindent:expandtab:
# Author: Avishai Ish-Shalom <avishai@fewbytes.com>

# We need to specify GNU sed for OS X, BSDs, etc.
if [[ "$(uname -s)" == "Darwin" ]]; then
    SED=gsed
else
    SED=sed
fi

jboner

Latency Comparison Numbers (~2012)
----------------------------------
L1 cache reference                           0.5 ns
Branch mispredict                            5   ns
L2 cache reference                           7   ns                      14x L1 cache
Mutex lock/unlock                           25   ns
Main memory reference                      100   ns                      20x L2 cache, 200x L1 cache
Compress 1K bytes with Zippy             3,000   ns        3 us
Send 1K bytes over 1 Gbps network       10,000   ns       10 us
Read 4K randomly from SSD*             150,000   ns      150 us          ~1GB/sec SSD

earthgecko

#!/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-z0-9' | fold -w 32 | head -n 1

rponte

# The command finds the most recent tag that is reachable from a commit.
# If the tag points to the commit, then only the tag is shown.
# Otherwise, it suffixes the tag name with the number of additional commits on top of the tagged object 
# and the abbreviated object name of the most recent commit.
git describe

# With --abbrev set to 0, the command can be used to find the closest tagname without any suffix:
git describe --abbrev=0

# other examples

steinwaywhw

• Use curl to get the JSON response for the latest release
• Use grep to find the line containing file URL
• Use cut and tr to extract the URL
• Use wget to download it

curl -s https://api.github.com/repos/jgm/pandoc/releases/latest \
| grep "browser_download_url.*deb" \
| cut -d : -f 2,3 \
| tr -d \" \

bsara

Setup SSH Authentication for Git Bash on Windows

Prepararation

0. Create a folder at the root of your user home folder (Example: C:/Users/uname/) called .ssh.
1. Create the following files if they do not already exist (paths begin from the root of your user home folder):

• .ssh/config

eloo

# Set the command-line arguments to pass to the server.
ARGS='-web.listen-address=:9100 -collector.diskstats.ignored-devices="^(ram|loop|fd)\\d+$"' 

# Prometheus-node-exporter supports the following options:
#  -collector.diskstats.ignored-devices="^(ram|loop|fd|(h|s|v|xv)d[a-z])\\d+$": Regexp of devices to ignore for diskstats.
#  -collector.filesystem.ignored-mount-points="^/(sys|proc|dev)($|/)": Regexp of mount points to ignore for filesystem collector.
#  -collector.ipvs.procfs="/proc": procfs mountpoint.
#  -collector.megacli.command="megacli": Command to run megacli.
#  -collector.ntp.server="": NTP server to use for ntp collector.
#  -collector.textfile.directory="": Directory to read text files with metrics from.

nikhita

mkdir -p ~/.local/share/fonts
for type in Bold Light Medium Regular Retina; do wget -O ~/.local/share/fonts/FiraCode-$type.ttf "https://github.com/tonsky/FiraCode/blob/master/distr/ttf/FiraCode-$type.ttf?raw=true"; done
fc-cache -f

asukakenji

Go (Golang) GOOS and GOARCH

All of the following information is based on go version go1.17.1 darwin/amd64.

GOOS Values

GOOS	Out of the Box
aix	✅
android	✅

PurpleBooth

FROM golang:1.9

WORKDIR /go/src/github.com/purplebooth/example
COPY . .
RUN go build -ldflags "-linkmode external -extldflags -static" -a main.go

FROM scratch
COPY --from=0 /go/src/github.com/purplebooth/example/main /main
CMD ["/main"]