startergo

tar -cvzf /tmp/overlay.tar.gz /overlay

scp -O [email protected]:/tmp/overlay.tar.gz ~/Downloads

sudo find / -type f -size +100000k -exec ls -lh {} \; | awk '{ print $9 ": " $5 }’ > large_files.txt

rm -rF

Migrate Archive Google Code SVN to Git

sudo apt-get install git
sudo add-apt-repository ppa:git-core/ppa

find . -name "*.py" -exec sed -i '' -e 's|#!/usr/bin/python|/#!usr/bin/env python|g' {} \;

find . -type f -exec sed -i '' -e 's|#!/usr/bin/python|/#!usr/bin/env python|g' {} \;

If you get RE error: illegal byte sequence on Mac OS X add these lines:

brew deps --tree --installed

On older macOS's you may have difficulty reaching various secure web sites. They might give you a certificate expired error. They will work in Firefox, but not in Safari or Chrome. They also work on newer versions of macOS (e.g. Catalina, Big Sur). This seems to be because Safari and Chrome use the OS root certificate store and Firefox uses its own, and El Capitan and older macOS's are not being updated.
To update the root certificates on old macOS's follow this:

On that Mac with up to date certificates, launch Keychain Access, select "System Roots", select all certificates, select File->Export, and export them as rootcerts.pem file. This file will contain all the certificates concatenated.
Copy the rootcerts.pem file to your obsolete macOS.
Make the trustroot shell script below:

#!/bin/bash
DIR=${TMPDIR}/trustroot.$$
mkdir -p ${DIR}

brew install progress

ps aux | grep "dd"

This will make sure that /usr/local/bin is part of PATH for all shells started/Terminal tabs created after the line has been executed.

sudo sh -c 'grep -q "/usr/local/bin" /etc/paths || echo "/usr/local/bin" >> /etc/paths'

gdown <file_id> --output "some.dmg"

Download a file using wget from Dropbox by changing dl=0 to dl=1 at the end of the shared link:

wget -O "file_name.dmg" "https://www.dropbox.com/s/<random_numbers>.dmg?dl=1"

Download a file using curl from Dropbox by changing dl=0 to dl=1 at the end of the shared link:

	#!/bin/bash
	clear

	destination=~/Desktop/Mac\ OS\ X\ Install\ DVD

	#make destination folder
	[ ! -d "$destination" ] && mkdir "$destination"

	#make sure disc is in drive
	while [ ! -d /Volumes/Mac\ OS\ X\ Install\ DVD ] ; do