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Mac Network Commands Cheat Sheet

After writing up the presentation for MacSysAdmin in Sweden, I decided to go ahead and throw these into a quick cheat sheet for anyone who’d like to have them all in one place. Good luck out there, and stay salty.

Get an ip address for en0:

ipconfig getifaddr en0

Same thing, but setting and echoing a variable:

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function! GenerateTagsIncrementally()
python << EOF
import os
print('Generating tags incrementally.')
# Walk the file tree, if a file has an mtime more recent than the tag file,
# add it to the list of files to index.
tags_mtime = os.stat('tags').st_mtime
with open('list', 'w') as fp:
    for dirpath, dirnames, filenames in os.walk(os.getcwd()):
        for filename in filenames:

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Squid Setup

Install

# brew install squid2

Update squid conf

# vim /usr/local/Cellar/squid2/2.7.9/etc/squid.conf

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#!/usr/bin/env python
# -*- coding: utf-8 -*-
"""
Pdfcrop
=======

Based on pdfcrop.pl_. Uses the BoundingBox [#]_

Dependencies:
  - PyPDF2_

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#!/usr/bin/env bash

set -euo pipefail
origdir=$(pwd)
tmpdir=$(mktemp -d)
echo "tmpdir: $tmpdir"
read -r width height < <(pdfinfo $1 | grep "Page size:" | sed 's/[a-zA-Z: ]*\([0-9]\+\)[x ]*\([0-9]\+\).*/\1 \2/')
npages=$(pdfinfo $1 | grep "Pages:" | sed 's/Pages: \+\([0-9]\+\).*/\1/')
echo "page count: $npages"
echo "(width, height) = ($width, $height)"

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#!/usr/bin/env bash

set -e

function yesno() {
    read -p "$1 Continue? (y/n): "
    case $(echo -e "$REPLY" | tr '[A-Z]' '[a-z]') in
        y|yes) echo "yes" ;;
        *)     echo "no" ;;
    esac