02-22-2007
Checking for availability of remote server
Hi. In my KSH script I'm running a command on a remote server. I want to know how I can test to see if the remote server is available (accessible) prior to running the command. Any ideas?
My command looks like:
`ssh $USER@$TARGET_SERVER_DNS ls -l $REMOTE_FOLDER `
This check should be generic enough to handle the following cases:
- server not available (network problem)
- server DNS name not found
- invalid user name, user doesn't exist on the remote server
- remote folder path doesn't exist
- etc
I just need to the SSH command to return a true/false indicating success or failure, that's it.
One inportant point: PING is disabled in my environment.
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jinfo(1) General Commands Manual jinfo(1)
NAME
jinfo - configuration info
SYNOPSIS
jinfo [ option ] pid
jinfo [ option ] executable core
jinfo [ option ] [ server-id@ ] remote-hostname-or-IP
PARAMETERS
Options are mutually exclusive. Option, if used, should follow immediately after the command name. See OPTIONS below.
pid process id for which the configuration info is to be printed. The process must be a Java process. To get a list of Java pro-
cesses running on a machine, jps many be used.
executable Java executable from which the core dump was produced.
core core file for which the configuration info is to be printed.
remote-hostname-or-IP
remote debug server's (see jsadebugd) hostname or IP address.
server-id optional unique id, if multiple debug servers are running on the same remote host.
DESCRIPTION
jinfo prints Java configuration information for a given Java process or core file or a remote debug server. Configuration information
includes Java System properties and Java virtual machine command line flags.
NOTE - This utility is unsupported and may or may not be available in future versions of the J2SE SDK. jinfo is not currently available on
Windows platforms or on the Linux Itanium platform.
OPTIONS
<no option> prints both command line flags as well as System properties name, value pairs
-flags prints command line flags as name, value pairs
-sysprops prints JavaSystem properties as name, value pairs
-h prints a help message
-help prints a help message
SEE ALSO
jps(1) jsadebugd(1)
13 June 2004 jinfo(1)