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Full Discussion: Bash Script to check Remote Host Connection
Top Forums UNIX for Dummies Questions & Answers Bash Script to check Remote Host Connection Post 302185926 by era on Wednesday 16th of April 2008 05:54:39 AM
Old 04-16-2008
Define "up and running".

Code:
ping -c 1 remotehost || { echo "does not respond to ping" >&2 ; exit ; }
rup remotehost || { echo "no rup" >&2; exit; }
# if you have netcat, and ssh on port 22 on remotehost
nc -z remotehost 22 || { echo "nobody home on port 22" >&2; exit; }
ssh remotehost true || { echo "does not let me in" >&2; exit; }

If you want to check port 80 instead, try to fetch a web page, etc.

This obviously also depends on firewall blocks and stuff like that.
 

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LEARN ABOUT OPENSOLARIS

rup

rup(1)								   User Commands							    rup(1)

NAME

       rup - show host status of remote machines (RPC version)

SYNOPSIS

       rup [-hlt]

       rup [host]...

DESCRIPTION

       rup gives a status similar to uptime for remote machines. It broadcasts on the local network, and displays the responses it receives.

       Normally,  the  listing	is in the order that responses are received, but this order can be changed by specifying one of the options listed
       below.

       When host arguments are given, rather than broadcasting rup will only query the list of specified hosts.

       A remote host will only respond if it is running the rstatd daemon, which is normally started up from inetd(1M).

       In the absence of a name service, such as LDAP or NIS, rup displays host names as numeric IP addresses.

OPTIONS

       -h    Sort the display alphabetically by host name.

       -l    Sort the display by load average.

       -t    Sort the display by up time.

ATTRIBUTES

       See attributes(5) for descriptions of the following attributes:

       +-----------------------------------------------------------+
       |ATTRIBUTE TYPE		      ATTRIBUTE VALUE		   |
       |Availability		      SUNWrcmdc 		   |
       +-----------------------------------------------------------+

SEE ALSO

       ruptime(1), inetd(1M), attributes(5)

       Solaris Express Installation Guide: Basic Installations

BUGS

       Broadcasting does not work through gateways.

SunOS 5.11							    7 Mar 2003								    rup(1)
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