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@gubatron
gubatron / How to resize EBS Volume partition.md
Last active Sep 19, 2019
How to resize EBS Volume Disk partition
View How to resize EBS Volume partition.md

Root disk

  1. sudo growpart /dev/xvda 1
  2. reboot

Secondary Mounted EBS disks

  1. Modify volume size in AWS dashboard
  2. Resize sudo xfs_growfs -d /dev/xvdf
  3. No need to restart
@gubatron
gubatron / contains_item.sh
Last active Sep 6, 2019
bash: contains_item function. Check if an item is in an array
View contains_item.sh
#############################################################################
# contains_item ${needle} ${haystack[@]}
#############################################################################
contains_item() {
set +x
local ITEM=$1
local LIST=${@:2}
for ELEM in ${LIST[@]}
do
@gubatron
gubatron / ndk_archs_toolsets.md
Last active May 11, 2019
NDK architectures, toolsets and toolchains
View ndk_archs_toolsets.md

Android

x86

  • CC=$ANDROID_TOOLCHAIN/bin/i686-linux-android-clang
  • linux-elf
  • toolset=clang-x86

x86_64

  • CC=$ANDROID_TOOLCHAIN/bin/x86_64-linux-android-clang;
  • linux-x86_64
@gubatron
gubatron / jdk-builder.sh
Created Apr 9, 2019
Creating a custom JDK 12
View jdk-builder.sh
# compress = 1 -> shared strings
# compress = 2 -> zip
# if we use shared strings and then do lzma on a tar we go down to 14M .lzma file
jlink --no-header-files --no-man-pages --compress=1 --strip-debug --add-modules java.base,java.compiler,java.desktop,java.instrument,java.management,java.naming,java.prefs,java.scripting,java.sql --output frostwire-jre.nozip
#jlink --no-header-files --no-man-pages --compress=2 --strip-debug --add-modules java.base,java.compiler,java.desktop,java.instrument,java.management,java.naming,java.prefs,java.scripting,java.sql --output frostwire-jre
tar cvf frostwire-jre.nozip.tar frostwire-jre.nozip
lzma -k -z -0 -e --threads=4 -v frostwire-jre.nozip.tar
@gubatron
gubatron / cmake_clean
Created Mar 28, 2019
cmake_clean bash script
View cmake_clean
#!/usr/bin/env bash
function rmfile() {
if [ -f $1 ]; then rm -f $1 ; fi
}
function rmdir() {
if [ -d $1 ]; then rm -fr $1; fi
}
rmfile CTestTestfile.cmake
rmfile install_manifest.txt
rmfile CMakeCache.txt
@gubatron
gubatron / quicksort.cpp
Created Feb 3, 2019
specific quick sort implementation in C++ for a struct based array
View quicksort.cpp
void quickSort(wordItem arr[], int length, bool reverse) {
if (length <= 1) {
return;
}
const int pivot_count = arr[length / 2].count;
int smaller_length = 0;
int bigger_length = 0;
int equal_length = 0;
for (int i = 0; i < length; i++) {
@gubatron
gubatron / startSSHAgent.sh
Last active Nov 28, 2018
quick and dirty startSSHAgent bash function
View startSSHAgent.sh
function startSSHAgent {
if [[ -z "$SSH_AGENT_PID" ]]; then
echo "Starting fresh ssh agent"
else
kill $SSH_AGENT_PID
fi
eval `ssh-agent`
ssh-add ~/.ssh/my_private_key
ssh-add ~/.ssh/my_private_key_2
...
View parity tests benchmark.cpp
// g++ -std=c++11 parity_benchmark.cpp -o parity_benchmark
#include <iostream>
#include <chrono>
#include <functional>
std::int64_t now() {
return std::chrono::duration_cast<std::chrono::milliseconds>(std::chrono::system_clock::now().time_since_\
epoch()).count();
}
@gubatron
gubatron / array_size.c
Last active Oct 18, 2018
Playing with arrays in C, getting the number of elements in an array, adding elements to an int "array" in dynamic memory manually with an int pointer.
View array_size.c
// gcc array_size.c -o array_size
#include <stdio.h> // printf
#include <stdlib.h> // malloc
int main() {
char arr[] = {'a','b','c','d','e'};
// this is how you can find out what the number of elements in an array is -> sizeof(theArray)/sizeof(any-element)
// here we print the count, and where the array is in memory. %p is used to print pointer addresses in printf.
printf("charArray.count -> %lu @ %p\n", sizeof(arr)/sizeof(arr[0]), &arr);
@gubatron
gubatron / CMakeList.txt
Last active Oct 18, 2018
CMakeList.txt for Bitcoin Unlimited + macOS CLion IDE based development
View CMakeList.txt
#
# Author: Angel Leon (@gubatron)
# October 2nd 2018
#
#
# README:
#
# This CmakeLists.txt file is not meant to produce any executables or libraries.
#
# It has been created for CLion or any other cmake compatible IDE users so that they can
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