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Top Forums UNIX for Beginners Questions & Answers How to connect to a DB installed on another host using shell script? Post 303030763 by RudiC on Friday 15th of February 2019 06:38:01 AM
Old 02-15-2019
I'm afraid that none of the scripts posted will do what you expect. On the other hand, it's not too well known what your targets are. Some comments:

Host B:
- is that script's path /scripts/checkDB.sh?
- it will output lines after lines "Trying ..." and "DB is up ..." if the pmon test fails. This is important for the planned evaluation on host A.
- try ps -ef | grep -q [p]mon in lieu of your lenghtier approach.

Host A:
- the local variable checkDB will be filled with text (at least "DB is up ... if not with lines after lines) but never evaluated.
- rval is set to 0 and not modified before the first zero test.
- what is the process test for server.sh for?
- why do you run startup.sh on host A if the DB should run on host B?
- same comment on ps ... | grep ... as for host B.
 

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bootpd(8)						      System Manager's Manual							 bootpd(8)

Name
       bootpd - Server to help boot diskless clients

Syntax
       /usr/etc/bootpd [ -d ] [ -i ]

Description
       The server is for the Internet BOOTP protocol (a UDP-based protocol).  This allows a diskless machine to find out its Internet address, the
       address of a bootserver, and the name of a file to boot.

       The server is either started from or from If is started from the -i flag must be supplied by The server reads its configuration file,  when
       it starts up. When a new request arrives, checks to see if the file has been modified, and if so, reads it again.

       If  started  by	waits  until  no new requests arrive for one minute.  This limits the overhead of restarting the daemon without tying up a
       process slot when nothing is happening.	The following is an example of the format of the configuration file:
       #
       # /etc/bootptab:  database for bootp server (/usr/etc/bootpd)
       #
       # Blank lines and lines beginning with '#' are ignored.
       #
       # home directory

       /usr/local/bootfiles

       # default bootfile

       defaultboot

       # end of first section

       %%

       #
       # The remainder of this file contains one line per client
       # interface with the information shown by the table headings
       # below. The host name is also tried as a suffix for the
       # bootfile when searching the home directory (that is,
       # bootfile.host)
       #
       # host	      htype haddr	  iaddr 	 bootfile
       #

       hostx	      1 02:60:8c:06:35:05 99.44.0.65	 ultrix
       hosty	      1 02:07:01:00:30:02 99.44.0.65	 vms
       hostz	      1 02:60:8c:00:77:78 99.44.0.03	 lps40
       node1	      1 02:60:8c:00:99:47 99.44.0.01	 tops20
       The first two lines specify the home (default) directory and the default bootfile, respectively.  A line starting with  two  percent  signs
       (%%) separates these first lines from the host information table, which contains an entry for each bootable host.

       You  should  start with a configuration file similar to this and edit the host entries to correspond to your local systems.  The host field
       does not have to be a formal host name; it is used for identification in the log file and also as a  possible  extension  to  the  bootfile
       name.

       The  is	always	1  and	corresponds to the hardware type assigned Ethernet by the Assigned Numbers RFC.  The field can use a period (.), a
       hyphen (-), or a colon (:) as separators.  The entry is the file used if the client does not know the name of the file it  wants  to  boot.
       This is frequently the case when a diskless workstation is booted.

       The server logs interesting events using

Options
       -d   Logs all requests and indicates what responses are made.

       -i   If is started from the -i flag must be supplied by

Files
       Configuration file

See Also
       inetd(8c), tftpd(8c)

																	 bootpd(8)
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