marcoemorais

### python-virtualenv-notes ###

Notes from virtualenv documentation on pypi http://pypi.python.org/pypi/virtualenv

o Install
    o instructions for installing
        http://www.virtualenv.org/en/latest/#installation
    o in case you haven't already install pip
        $ sudo apt-get install python-pip
            OR

marcoemorais

#!/usr/bin/env bash

EXPECTED_ARGS=2

if [ $# -ne $EXPECTED_ARGS ]
then
  echo "Usage: `basename $0` rpm-file target-dir"
  exit 1
fi

marcoemorais

# canonical sar command invocation
sar -f [FILE] [flags] [interval] [count]

# general purpose flags
# -f [FILE] refers to a file in /var/log/sa/saXX where XX is the day of month
# -o [FILE] capture all performance data in a binary file to be read with sar later
#           Note: *all* performance counters are captured by default
# -p flag will pretty print device names rather than using dev{m}-{n} format
# when [interval] is 0 sar will report statistics for time since boot

marcoemorais

# find the IP addresses of many hosts on the network
# step 1. obtain the broadcast address from ifconfig
# step 2. ping the broadcast address
$ ifconfig -a | grep broadcast
    inet 192.168.1.102 netmask 0xffffff00 broadcast 192.168.1.255
    inet 192.168.68.1 netmask 0xffffff00 broadcast 192.168.68.255
    inet 192.168.174.1 netmask 0xffffff00 broadcast 192.168.174.255
$ ping 192.168.1.255
    PING 192.168.1.255 (192.168.1.255): 56 data bytes
    64 bytes from 192.168.1.1: icmp_seq=0 ttl=64 time=0.634 ms

marcoemorais

# *** tmux subcommands ***

    # start a new tmux session
    tmux new-session -s [session-name]

    # start a new tmux session with a named window
    tmux new-session -s [session-name] -n [window-name]

    # list running sessions

marcoemorais

#!/usr/bin/env python

import unittest

import pandas as pd


class AllTest(unittest.TestCase):

    def test_all(self):

marcoemorais

#include <variant>
#include <vector>

using namespace std;

class Circle;
class Square;

class DrawVisitor {
public: