Backup and Restore is probably the most important thing to know how to do when you have a database with data you care about.
The utilities in PostgreSQL that accomplish these tasks are pg_restore, pg_dump, pg_dumpall, and for restore of plain text dumps - psql.
A lot of the switches used by pg_dump, pg_restore, pg_dumpall are common to all three. You use pg_dump to do backups of a single database or select database objects and pg_restore to restore it either to another database or to recover portions of a database. You use pg_dumpall to dump all your databases in plain text format.
Rather than trying to keep track of which switch works with which, we decided to combine all into a single cheat sheet with a column denoting which utility the switch is supported in. Pretty much all the text is compiled from the --help switch of each.
We created a similar Backup and Restore cheatsheet for PostgreSQL 8.3 and since then some new features have been added such as the jobs parallel restore feature in 8.4. We have now created an updated sheet to comprise all features present in PostgreSQL 9.0 packaged pg_dump, pg_restore, pg_dumpall command line utilities.
As usual please let us know if you find any errors or omissions and we'll be happy to correct.