Most often used Linux/Mac OSX Commands (Incomplete)

gistfile1.txt

ls -al
cd
pwd

mv folder/file new-folder/

sudo !! (after I’ve realized for the zillionth time I didn’t run the command as sudo)

cp file.txt new-folder/

chown new-owner[:new-group] thisfile.txt
OR 
chown -R new-owner[:new-group] thisdirectorywithlotsastuff/

Rsync (always used locally) to get something from remote:
General Structure: rsync -a --progress [src] [destination]
rsync -a —progress username@server.location.com(or 123.456.78.9):/path/to/thingtodownload.txt /local/path/for/stuff/
OR
Rsync to put something onto a remote:
rsync -a —progress  /local/path/to/thing.txt username@server.location.com(or 123.456.78.9):/path/to/put/stuff/