Restore a postgres backup file using the command l

Question

I'm new to postgresql, and locally, I use pgadmin3. On the remote server, however, I have no such luxury.

I've already created the backup of the database and copied it over, but, is there a way to restore a backup from the command line? I only see things related to GUI or to pg_dumps, so, if someone can tell me how to go about this, that'd be terrific!

Answer 1

try:

pg_restore -h localhost -p 5432 -U <username> -d <dbname> -1 <filename>

Answer 2

If you want to backup your data or restore data from a backup, you can run the following commands:

1 To create backup of your data, go to your postgres \bin\ directory like C:\programfiles\postgres\10\bin\ and then type the following command - pg_dump -FC -U ngb -d ngb -p 5432 >C:\BACK_UP\ngb.090718_after_readUpload.backup

2 To restore data from a backup, go to your postgres \bin\ directory like C:\programfiles\postgres\10\bin\ and then type below command - C:\programFiles\postgres\10\bin> pg_restore -Fc -U ngb -d ngb -p 5432 <C:\ngb.130918.backup

Please make sure that the backup file exists.

Answer 3

create backup

pg_dump -h localhost -p 5432 -U postgres -F c -b -v -f 
"/usr/local/backup/10.70.0.61.backup" old_db

-F c is custom format (compressed, and able to do in parallel with -j N) -b is including blobs, -v is verbose, -f is the backup file name

restore from backup

pg_restore -h localhost -p 5432 -U postgres -d old_db -v 
"/usr/local/backup/10.70.0.61.backup"

important to set -h localhost - option

Answer 4

Below is my version of pg_dump which I use to restore the database:

pg_restore -h localhost -p 5432 -U postgres -d my_new_database my_old_database.backup

or use psql:

psql -h localhost -U postgres -p 5432 my_new_database < my_old_database.backup

where -h host, -p port, -u login username, -d name of database

Answer 5

As below link said, you can use psql command for restoring the dump file:

https://www.postgresql.org/docs/8.1/static/backup.html#BACKUP-DUMP-RESTORE

psql dbname < infile

if you need to set username just add the username after the command like:

psql dbname < infile username

Answer 6

There are two tools to look at, depending on how you created the dump file.

Your first source of reference should be the man page pg_dump(1) as that is what creates the dump itself. It says:

Dumps can be output in script or archive file formats. Script dumps are plain-text files containing the SQL commands required to reconstruct the database to the state it was in at the time it was saved. To restore from such a script, feed it to psql(1). Script files can be used to reconstruct the database even on other machines and other architectures; with some modifications even on other SQL database products.

The alternative archive file formats must be used with pg_restore(1) to rebuild the database. They allow pg_restore to be selective about what is restored, or even to reorder the items prior to being restored. The archive file formats are designed to be portable across architectures.

So depends on the way it was dumped out. You can probably figure it out using the excellent file(1) command - if it mentions ASCII text and/or SQL, it should be restored with psql otherwise you should probably use pg_restore

Restoring is pretty easy:

psql -U <username> -d <dbname> -1 -f <filename>.sql

or

pg_restore -U <username> -d <dbname> -1 <filename>.dump

Check out their respective manpages - there's quite a few options that affect how the restore works. You may have to clean out your "live" databases or recreate them from template0 (as pointed out in a comment) before restoring, depending on how the dumps were generated.