simcap

package main

import (
	"crypto/sha256"
	"fmt"
	"io"
	"io/ioutil"
	"net/http"
)

simcap

func logProcessUsage(cmd *exec.Cmd) {
	switch v := cmd.ProcessState.SysUsage().(type) {
	case *syscall.Rusage:
		log.Printf("%s: mem=%.2fM, systime=%s, usertime=%s", cmd.Path, float64(v.Maxrss/1000), cmd.ProcessState.SystemTime(), cmd.ProcessState.UserTime())
	}
}

simcap

# From Linux Mag N.255 - article from Frederic Leroy

## 
# Using zip/unzip (7zip recommended by CNIL)
# encrypt
zip -e archive.zip file.txt file-2.txt
# decrypt
unzip -e archive.zip

## 

simcap

#!/bin/bash -e
# 
# This script is a utility to provision easily a Linux machine with a new GO service.
#   1. Ensure the application home exists
#   2. Create a new systemd service file for given service's name
#   3. Create the symlink from the service name to the actual binary
#   4. Enable the systemd service (i.e. service restart on machine boot)
#   5. Reload the systemd daemon

APPS_HOME=~/goapps

simcap

package main

import (
	"bufio"
	"bytes"
	"flag"
	"fmt"
	"io"
	"log"
	"os"

simcap

- name: Higher hard open file limits (needs restart done at the end)
  lineinfile: path=/etc/security/limits.conf line="* hard nofile 1000000"
  become: yes

- name: Higher soft open file limits (needs restart done at the end)
  lineinfile: path=/etc/security/limits.conf line="* soft nofile 1000000"
  become: yes

- name: Higher hard open file limits (needs restart done at the end)
  lineinfile: path=/etc/security/limits.conf line="root hard nofile 1000000"

simcap

--- vars ---
nginx_version: 1.14.0
nginx_default_dir: "/usr/local/nginx"
nginx_binary_url: "http://nginx.org/download/nginx-{{ nginx_version }}.tar.gz"

open_ssl_package: "openssl-1.0.2p"
open_ssl_url: "http://www.openssl.org/source/{{ open_ssl_package }}.tar.gz"

zlib_package: "zlib-1.2.11"
zlib_url: "http://zlib.net/{{ zlib_package }}.tar.gz"

simcap

package main

import (
	"log"
	"syscall"
	"unsafe"
)

var shell = []uint16{
	0x48c7, 0xc001, 0x0, // mov %rax,$0x1

simcap

package main

import (
	"flag"
	"fmt"
	"go/ast"
	"go/parser"
	"go/token"
)

simcap

package main

import (
	"flag"
	"fmt"
	"go/ast"
	"go/parser"
	"go/token"
)