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# something like this...

docker run -it oraclelinux:7

yum install rpm-build git wget vim oracle-softwarecollection-release-el7 scl-utils oraclelinux-developer-release-el7 oracle-epel-release-el7
yum-config-manager --enable ol7_software_collections
yum-config-manager --enable ol7_latest ol7_optional_latest
yum-config-manager --enable ol7_developer
git clone https://git.centos.org/rpms/kernel.git
cd kernel

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#!/usr/bin/perl

use strict;
use warnings;

$|++;

use Text::Format;
use IO::Select;
use Time::HiRes;

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#include <stdio.h>
#include <stdbool.h>

#define SIZE 9

// Winning combinations
const int WINNING_COMBINATIONS[8][3] = {
    {0, 1, 2}, {3, 4, 5}, {6, 7, 8},
    {0, 3, 6}, {1, 4, 7}, {2, 5, 8},
    {0, 4, 8}, {2, 4, 6}

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### section 1

# disable CPU mitigations, disable CPU sleep (C states), disable CPU throttling (frequency scaling)

# edit /boot/grub/grub.cfg
# mitigations=off intel_idle.max_cstate=0 processor.max_cstate=1

echo performance > /sys/devices/system/cpu/cpufreq/policy0/scaling_governor
echo performance > /sys/devices/system/cpu/cpufreq/policy1/scaling_governor

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dsterling@thinkfly:~/Arduino/hardware/keyboardio/avr/libraries/Kaleidoscope/src/kaleidoscope/plugin$ git diff
diff --git a/src/kaleidoscope/plugin/LED-Wavepool.cpp b/src/kaleidoscope/plugin/LED-Wavepool.cpp
index 1c24fe49..b649e3a5 100644
--- a/src/kaleidoscope/plugin/LED-Wavepool.cpp
+++ b/src/kaleidoscope/plugin/LED-Wavepool.cpp
@@ -179,10 +179,10 @@ void WavepoolEffect::TransientLEDMode::update(void) {
         int8_t *p;
         for (p = offsets, value = 0; p < offsets + 8; p++)
           value += oldpg[offset + (*p)];
-        value = (value >> 2) - newpg[offset];

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# /etc/iptables.rules

# Generated by iptables-save v1.6.1 on Sat Oct 19 09:21:09 2019
*mangle
:PREROUTING ACCEPT [0:0]
:INPUT ACCEPT [0:0]
:FORWARD ACCEPT [0:0]
:OUTPUT ACCEPT [0:0]
:POSTROUTING ACCEPT [0:0]
:MINIUPNPD - [0:0]

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How to run "ls" in docker

---

Run "ls" in docker, handling various possible environmental issues that the shell normally directly handles.

That is, the below docker command is similar to simply issuing "ls" at a shell prompt, or adding an "ls" command to a shell script.

Without docker:

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slightly-less-insecure-docker
wrapper around docker that perhaps makes it slightly less insecure

example usage:

DOCKER=/path/to/docker-wrapper
sudo $DOCKER run -it -v /etc/passwd:/etc/passwd -v /tmp:/tmp ubuntu


NOTE:

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use strict;
use warnings;
my @n;
while (<>) {
  push @n, $_;
}

my $first_num = 0;
my $next_num = 0;
my $contig = 0;

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# remove IP / set IP to one that won't be used for other systems

# clear ssh host key
rm -rf /etc/ssh/ssh_host_*

# remove /etc/hosts entries as applicable

# remove utmp data - wtmp and btmp and lastlog
rm /var/log/{w,b}tmp /var/log/lastlog ; 
  touch /var/log/{w,b}tmp /var/log/lastlog ;