crittelmeyer

Linux tools to know

Built-in Mac OS tools

• ls - list directory contents
• wc - word, line, character, and byte count
• cp - copy files
• mv - move files
• rm - remove directory entries
• chmod - change file modes or Access Control Lists
• chown - change file owner and group

crittelmeyer

Differences between grep, pgrep, egrep, and fgrep (Linux):

grep

grep is an acronym that stands for "Global Regular Expressions Print". grep is a program which scans a specified file or files line by line, returning lines that contain a pattern. A pattern is an expression that specifies a set of strings by interpreting characters as meta-characters. For example the asterisk meta character (*) is interpreted as meaning "zero or more of the preceding element". This enables users to type a short series of characters and meta characters into a grep command to have the computer show us what lines in which files match.

The standard grep command looks like:

grep '' grep prints the search results to the screen (stdout) and returns the following exit values:

0 A match was found.

crittelmeyer

#!/usr/bin/python
# Adapted from http://kutuma.blogspot.com/2007/08/sending-emails-via-gmail-with-python.html
 
import getpass
import smtplib
from email.MIMEMultipart import MIMEMultipart
from email.MIMEBase import MIMEBase
from email.MIMEText import MIMEText
from email import Encoders
import os

crittelmeyer

tmux/tmuxinator cheatsheet

tmux

As configured in my dotfiles, here and here.

Command line

$ tmux                           -> start new
$ tmux new -s myname             -> start new w/session name
$ tmux a  #  (or at, or attach)  -> attach
$ tmux a -t myname               -> attach to named

crittelmeyer

crontab -e
*/30 * * * * say -v whisper "I am watching you"

crittelmeyer

echo -e "\e[1;40m" ; clear ; while :; do echo $LINES $COLUMNS $(( $RANDOM % $COLUMNS)) $(( $RANDOM % 72 )) ;sleep 0.05; done|awk '{ letters="abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789@#$%^&*()"; c=$4; letter=substr(letters,c,1);a[$3]=0;for (x in a) {o=a[x];a[x]=a[x]+1; printf "\033[%s;%sH\033[2;32m%s",o,x,letter; printf "\033[%s;%sH\033[1;37m%s\033[0;0H",a[x],x,letter;if (a[x] >= $1) { a[x]=0; } }}'

crittelmeyer

#!/bin/bash
# Let it Rain!
# Copyright (C) 2011, 2013 by Yu-Jie Lin
#
# Permission is hereby granted, free of charge, to any person obtaining a copy
# of this software and associated documentation files (the "Software"), to deal
# in the Software without restriction, including without limitation the rights
# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
# copies of the Software, and to permit persons to whom the Software is
# furnished to do so, subject to the following conditions:

crittelmeyer

                         _
 _._ _..._ .-',     _.._(`))
'-. `     '  /-._.-'    ',/
   )         \            '.
  / _    _    |             \
 |  a    a    /              |
 \   .-.                     ;  
  '-('' ).-'       ,'       ;
     '-;           |      .'
        \           \    /

crittelmeyer

#!/bin/bash -e

osascript -e 'tell application "Terminal" to activate' -e 'tell application "System Events" to tell process "Terminal" to keystroke "t" using command down'

crittelmeyer

#!/bin/bash -e

git status -s | grep -e "^??" | cut -c 4- >> .gitignore