Thread: pgaccess on win95 connection

pgaccess on win95 connection

From
bbarnes@operamail.com (Bill Barnes)
Date:
Installed the rpm of 6.5.3 seemingly with success.  Can access template1 with pgsql and pgaccess on a Mandrake 6.1
machine.
"ps ax | grep postmaster" reports the following:  551  ?                S            0:00  /usr/bin/postmaster -i -S
-D/var/lib/pgsql1932 pts/1          S            0:00  grep postmaster
 

'1932'  increments by 2 on each iteration of the ps command.   Don't know enough about what I am doing to interpret
this, but in executing pgaccess on the windows machine I get the following:
  the connection window displays      localhost                                                          5432  I
entered                                         template1
postgres                                                         <password>  The connect error message is
          Error trying to connect database "template1" on host localhost
 
    PostgreSQL error message:  Connection to database failed    connectDB() failed:  Is the postmaster running and
acceptingTCP/IP(with -i) connections    at 'localhost' on port '5432'?
 

Tried changing the port number.   It looks at least like we are getting to the database.  How do I ping the server?



Re: [INTERFACES] pgaccess on win95 connection

From
"Ross J. Reedstrom"
Date:
Hi Bill!
Welcome to the PostgreSQL world.

On Mon, Nov 29, 1999 at 10:59:48AM +0000, Bill Barnes wrote:
> Installed the rpm of 6.5.3 seemingly with success.  Can access template1
> with pgsql and pgaccess on a Mandrake 6.1 machine.  "ps ax | grep
> postmaster" reports the following:
>    551  ?                S            0:00  /usr/bin/postmaster -i
>    -S -D/var/lib/pgsql
>   1932 pts/1          S            0:00  grep postmaster

> '1932'  increments by 2 on each iteration of the ps command.   Don't

Hmm, seems you're a bit new to unix as well, eh? Don't worry about this,
it's just finding the process that's running the 'grep' command you typed.

> know enough about what I am doing to interpret this, but in executing
> pgaccess on the windows machine I get the following:

Windows, eh? So this is a different machine on the network.

> 
>    the connection window displays      localhost
>                                                            5432
>    I entered                                          template1
>                                                            postgres
>                                                            <password>
>    The connect error message is                      
>      Error trying to connect database "template1" on host localhost
> 
>      PostgreSQL error message:  Connection to database failed
>      connectDB() failed:  Is the postmaster running and accepting TCP/IP(with -i) connections
>      at 'localhost' on port '5432'?
> 

Right, because the machine postmaster is running on is _not_ localhost, but
rather the Linux box you mentioned up top. Replace 'localhost' with the
DNS name of that computer. Ah, back on the linux box, make sure you edit
pg_hba.conf to allow access from the Windows machine. You'll need to know
it's IP number. BTW, the 'ps' output above is useful to see that you _do_
have network access turned on for postgresql (the -i switch).

> Tried changing the port number.   It looks at least like we are getting to the database.  How do I ping the server?

Nope, you're never leaving the windows machine. As to ping, umm, did you try
'ping db_server.name'? ;-) But you won't need to, if you can get to the linux
box over the network at all, like with telnet. Puting the right hostname in,
and allowing access via the pg_hba.conf file (I'm not sure where the Mandrake
install puts it, sorry.) should fix you right up.

Hope this helps,
Ross
-- 
Ross J. Reedstrom, Ph.D., <reedstrm@rice.edu> 
NSBRI Research Scientist/Programmer
Computer and Information Technology Institute
Rice University, 6100 S. Main St.,  Houston, TX 77005




************




Re: [INTERFACES] pgaccess on win95 connection

From
Lamar Owen
Date:
Bill Barnes wrote:
> 
> Installed the rpm of 6.5.3 seemingly with success.  Can access template1 with pgsql and pgaccess on a Mandrake 6.1
> machine.
> "ps ax | grep postmaster" reports the following:
>    551  ?                S            0:00  /usr/bin/postmaster -i -S -D/var/lib/pgsql
>   1932 pts/1          S            0:00  grep postmaster
> 
> '1932'  increments by 2 on each iteration of the ps command.   Don't know enough about what I am doing to interpret

The numbers 551 and 1932 are the process identifiers for the two
processes the grep found.  So postmaster is running. To determine which
port number postmaster has attached to, run 'netstat -ae |grep postgres'
-- this will show all ports on the machine that the user postgres has
attached, and postmaster is one of them.  Or, you can do a 'ls -al /tmp
|grep .s.PGSQL' -- the number you see after the '.s.PGSQL' is the port
number. 

[snip]
> this, but in executing pgaccess on the windows machine I get the following:

Ok.  It looks to me like you are trying to do the following:

You have a Mandrake 6.1 machine on your LAN running PostgreSQL.  You
further have a Windows machine on your LAN, from which you want to
connect to PostgreSQL running on the Mandrake 6.1 machine.

To do this:
1.)    In the pgaccess connection box, you will need to enter the hostname
or IP address of the server machine, not 'localhost'.

2.)    On the server machine, in the file '/var/lib/pgsql/pg_hba.conf', you
will need to add a line allowing access to the database from the IP
address or hostname of the Windows machine. If I remember correctly, you
can cause the postmaster to reread the pg_hba.conf file with a SIGHUP
sent to the postmaster process -- however, since it is apparent that you
are not very familiar with Unix-like systems, I recommend that you
restart the postmaster by executing, as root,
'/etc/rc.d/init.d/postgresql restart' -- this will completely restart
the postmaster.

Now try the connect again.

You can test whether the server is up or not by, in Windows, going to a
DOS prompt and executing 'ping' with the server's IP address.

You will also need to get a book on Unix administration; the O'Reilly
classic 'Essential System Administration' is a good start (www.ora.com).
Administering the PostgreSQL database requires a good knowledge of basic
system administration procedures -- and this O'Reilly book is one of the
best introductory sysadmin books you will find.  I also recommend
reading Bruce's book when it is complete -- the current draft is
available on the www.postgresql.org site.

And there's always the PostgreSQL documentation, which is installed by
default in the RPM installation in the directory
'/usr/doc/postgresql-6.5.3' -- since you are using Mandrake 6.1, just
point kfm over there, and browse around -- there is a complete copy of
the documentation there.

Hope that helps.

--
Lamar Owen
WGCR Internet Radio
1 Peter 4:11

************




Re: [INTERFACES] pgaccess on win95 connection

From
"Ross J. Reedstrom"
Date:
Hi Bill!
Welcome to the PostgreSQL world.

On Mon, Nov 29, 1999 at 10:59:48AM +0000, Bill Barnes wrote:
> Installed the rpm of 6.5.3 seemingly with success.  Can access template1
> with pgsql and pgaccess on a Mandrake 6.1 machine.  "ps ax | grep
> postmaster" reports the following:
>    551  ?                S            0:00  /usr/bin/postmaster -i
>    -S -D/var/lib/pgsql
>   1932 pts/1          S            0:00  grep postmaster

> '1932'  increments by 2 on each iteration of the ps command.   Don't

Hmm, seems you're a bit new to unix as well, eh? Don't worry about this,
it's just finding the process that's running the 'grep' command you typed.

> know enough about what I am doing to interpret this, but in executing
> pgaccess on the windows machine I get the following:

Windows, eh? So this is a different machine on the network.

> 
>    the connection window displays      localhost
>                                                            5432
>    I entered                                          template1
>                                                            postgres
>                                                            <password>
>    The connect error message is                      
>      Error trying to connect database "template1" on host localhost
> 
>      PostgreSQL error message:  Connection to database failed
>      connectDB() failed:  Is the postmaster running and accepting TCP/IP(with -i) connections
>      at 'localhost' on port '5432'?
> 

Right, because the machine postmaster is running on is _not_ localhost, but
rather the Linux box you mentioned up top. Replace 'localhost' with the
DNS name of that computer. Ah, back on the linux box, make sure you edit
pg_hba.conf to allow access from the Windows machine. You'll need to know
it's IP number. BTW, the 'ps' output above is useful to see that you _do_
have network access turned on for postgresql (the -i switch).

> Tried changing the port number.   It looks at least like we are getting to the database.  How do I ping the server?

Nope, you're never leaving the windows machine. As to ping, umm, did you try
'ping db_server.name'? ;-) But you won't need to, if you can get to the linux
box over the network at all, like with telnet. Puting the right hostname in,
and allowing access via the pg_hba.conf file (I'm not sure where the Mandrake
install puts it, sorry.) should fix you right up.

Hope this helps,
Ross
-- 
Ross J. Reedstrom, Ph.D., <reedstrm@rice.edu> 
NSBRI Research Scientist/Programmer
Computer and Information Technology Institute
Rice University, 6100 S. Main St.,  Houston, TX 77005




************




Re: [INTERFACES] pgaccess on win95 connection

From
Lamar Owen
Date:
Bill Barnes wrote:
> 
> Installed the rpm of 6.5.3 seemingly with success.  Can access template1 with pgsql and pgaccess on a Mandrake 6.1
> machine.
> "ps ax | grep postmaster" reports the following:
>    551  ?                S            0:00  /usr/bin/postmaster -i -S -D/var/lib/pgsql
>   1932 pts/1          S            0:00  grep postmaster
> 
> '1932'  increments by 2 on each iteration of the ps command.   Don't know enough about what I am doing to interpret

The numbers 551 and 1932 are the process identifiers for the two
processes the grep found.  So postmaster is running. To determine which
port number postmaster has attached to, run 'netstat -ae |grep postgres'
-- this will show all ports on the machine that the user postgres has
attached, and postmaster is one of them.  Or, you can do a 'ls -al /tmp
|grep .s.PGSQL' -- the number you see after the '.s.PGSQL' is the port
number. 

[snip]
> this, but in executing pgaccess on the windows machine I get the following:

Ok.  It looks to me like you are trying to do the following:

You have a Mandrake 6.1 machine on your LAN running PostgreSQL.  You
further have a Windows machine on your LAN, from which you want to
connect to PostgreSQL running on the Mandrake 6.1 machine.

To do this:
1.)    In the pgaccess connection box, you will need to enter the hostname
or IP address of the server machine, not 'localhost'.

2.)    On the server machine, in the file '/var/lib/pgsql/pg_hba.conf', you
will need to add a line allowing access to the database from the IP
address or hostname of the Windows machine. If I remember correctly, you
can cause the postmaster to reread the pg_hba.conf file with a SIGHUP
sent to the postmaster process -- however, since it is apparent that you
are not very familiar with Unix-like systems, I recommend that you
restart the postmaster by executing, as root,
'/etc/rc.d/init.d/postgresql restart' -- this will completely restart
the postmaster.

Now try the connect again.

You can test whether the server is up or not by, in Windows, going to a
DOS prompt and executing 'ping' with the server's IP address.

You will also need to get a book on Unix administration; the O'Reilly
classic 'Essential System Administration' is a good start (www.ora.com).
Administering the PostgreSQL database requires a good knowledge of basic
system administration procedures -- and this O'Reilly book is one of the
best introductory sysadmin books you will find.  I also recommend
reading Bruce's book when it is complete -- the current draft is
available on the www.postgresql.org site.

And there's always the PostgreSQL documentation, which is installed by
default in the RPM installation in the directory
'/usr/doc/postgresql-6.5.3' -- since you are using Mandrake 6.1, just
point kfm over there, and browse around -- there is a complete copy of
the documentation there.

Hope that helps.

--
Lamar Owen
WGCR Internet Radio
1 Peter 4:11

************