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# add self-signed cert to keychain (used by Chrome etc)
# Get the self-signed cert file by clicking on the lock icon in chrome and dragging it to desktop
# http://www.robpeck.com/2010/10/google-chrome-mac-os-x-and-self-signed-ssl-certificates/
sudo security add-trusted-cert -d -r trustRoot -k /Library/Keychains/System.keychain <self-signed cert>


# ldd equivalent
# https://discussions.apple.com/thread/309193?start=0&tstart=0
otool -L <bin>

# clipboard opy/paste 
# http://blog.rogeriopvl.com/archives/copy-to-clipboard-from-terminal-in-os-x/
cat <foo.txt> | pbcopy
pbpaste > <bar.txt>

# concat PDFs
cd /usr/local/bin
sudo ln "/System/Library/Automator/Combine PDF Pages.action/Contents/Resources/join.py" pdfjoin
pdfjoin -o PATH/TO/YOUR/MERGED/FILE.pdf /PATH/TO/ORIGINAL/1.pdf /PATH/TO/ANOTHER/2.pdf /PATH/TO/A/WHOLE/DIR/*.pdf