pexcn

#!/bin/bash

cat << EOF > /etc/systemd/system/monthly.timer
[Unit]
Description=Run script monthly

[Timer]
OnCalendar=*-*-01 02:00:00

[Install]

pexcn

Unpack Android system.new.dat.br

pacman -S brotli p7zip
curl -L -o /usr/local/bin/sdat2img.py https://github.com/xpirt/sdat2img/raw/master/sdat2img.py && chmod +x sdat2img.py

brotli -d system.new.dat.br
sdat2img.py system.transfer.list system.new.dat system.img
7z -y -bsp0 -bso0 x system.img

pexcn

Fix magisk stock backup does not exist

# put stock boot.img into /sdcard/boot.img

# get sha1
adb shell
su
SHA1=$(cat $(magisk --path)/.magisk/config | grep SHA1 | cut -d '=' -f 2)

pexcn

@echo off
setlocal

rem https://github.com/eamodio/vscode-gitlens/issues/965#issuecomment-734013893

set PATH=%~dp0usr\bin;%PATH%

:loop
if "%~1" equ "rev-parse" goto rev_parse
shift

pexcn

[Solarized Darcula]
text=d2d8d9
cyan(bold)=15968d
text(bold)=d2d8d9
magenta=797fd4
green=629655
green(bold)=629655
background=3d3f41
cyan=15968d
red(bold)=f24840

pexcn

#!/bin/sh -e
# Converts OpenVZ VPS to Alpine Linux
# WARNING: This script will wipe any data in your VPS!
# GPLv2; Partly based on https://gitlab.com/drizzt/vps2arch

server=http://images.linuxcontainers.org
path=$(wget -O- ${server}/meta/1.0/index-system | \
grep -v edge | awk '-F;' '($1=="alpine" && $3=="amd64") {print $NF}' | tail -1)

cd /

pexcn

BDP = Bandwidth * RTT

e.g.:

Server
SO_RCVBUF: 125000000Bytes (1000Mbps), 0.02s (20ms)
125000000Bytes * 0.02s = 2500000Bytes
SO_SNDBUF: 125000000Bytes (1000Mbps), 0.165s (165ms)
125000000Bytes * 0.165s = 20625000Bytes

pexcn

现代密码学实践指南[2015年]

标签（空格分隔）： 密码学

---

本文介绍目前现代密码学的最先进技术， 前半部分主要翻译自 《Cryptographic Right Answers》，附上收集的资料，和byron个人的理解。

pexcn

Shadowsocks 各加密方式的速度测试报告

• shadowsocks-libev: v3.3.5-6329526199674ddda8d8396a66072890b244972b
• shadowsocks-rust: v1.10.7
• 测试脚本: https://gist.github.com/pexcn/93b6ae3e137dfc11fda8a01abc6898fa

TL;DR (仅针对当前版本)

• 若不知道 CPU 是否支持 AES-NI, 则 chacha20-ietf-poly1305 为最稳妥的选择。
• 若 CPU 支持 AES-NI, 则 shadowsocks-rust 选择 aes-128-gcm, shadowsocks-libev 选择 aes-256-gcm 为最佳。

pexcn

#!/bin/bash -e

METHOD="$1"

# prepare
docker stop iperf-client ss-client ss-server iperf-server &>/dev/null || true
docker rm iperf-client ss-client ss-server iperf-server &>/dev/null || true

# iperf server
docker run -d --rm --name iperf-server --network host pexcn/docker-images:iperf -s -B 127.0.0.1 -p 10000 >/dev/null