Обсуждение: pgaccess on win95 connection
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?
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 ************
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 ************
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 ************
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 ************