Simple script to test mountGpoint for read-write Post: 302991985

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Top Forums Shell Programming and Scripting Simple script to test mountGpoint for read-write Post 302991985 by drysdalk on Monday 20th of February 2017 10:24:33 AM

02-20-2017

Registered User

Hi,

A script like this set up on ServerA should do the trick.

Code:

#!/bin/bash
date=`/bin/date +%Y%m%d%H%M%S`

email_to="unixforum@localhost"
email_subject="Something went wrong"
email_body="Uh-oh"

server="localhost"

if ! /usr/bin/ssh "$server" "/usr/bin/touch /mnt/testfile.$date" >/dev/null 2>/dev/null
then
        echo "$email_body" | /usr/bin/mail -s "$email_subject" "$email_to"
        exit 1
fi

exit 0

The 'date' variable at the top just creates a string via the 'date' command that consists of the year, month, date, hour, minute and second all run together. I went with this since you didn't specify any particular format, but this should do for most purposes (if the script only runs at most once per second, anyway).

The next three variables define the recipient, subject and body of the e-mail message. You can customise those all you like.

Finally, the variable 'server' defines the remote server that the 'ssh' command will use to connect to. You'll want to change this to the details of whatever ServerB is.

The basic idea of the script is that it connects to the remote server, and if the 'touch' command (or the 'ssh' command itself) returns a non-successful exit value for any reaason, it then proceeds to send the e-mail.

Here's an example session of it running, in a situation where the touch command at the remote end (which is really just 'localhost' in my test case) fails.

Code:

$ whoami
unixforum
$ ./script.sh 
$ mail
"/var/mail/unixforum": 1 message 1 new
>N   1 unixforum@localhost Mon Feb 20 15:17  15/654   Something went wrong
? 1
<e-mail headers appear here, redacted>

Uh-oh
? d 1
? q
Held 0 messages in /var/mail/unixforum
$

Hope this helps.

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LEARN ABOUT DEBIAN

wedged

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

NAME

       wedged - HylaFAX modem wedged script

SYNOPSIS

       /var/spool/hylafax/bin/wedged devid device

DESCRIPTION

       bin/wedged is the command script invoked by the facsimile server when a modem is deemed to be in an irreparable state and requires operator
       intervention.  This decision is based on the setting of the MaxSetupAttempts configuration parameter described in  hylafax-config(5).   The
       default	wedged	script	sends  electronic  mail  to  the  FaxMaster  alias. The interval at which emails are sent can be configured in the
       etc/FaxDispatch file by setting the WEDGED_EMAIL_INTERVAL variable to the desired number of minutes (emails will be sent no more than every
       WEDGED_EMAIL_INTERVAL  minutes,	until  the  wedged condition persists).  If the variable WEDGED_DISABLE_FAXGETTY is set in etc/FaxDispatch
       then the script will attempt to disable any faxgetty processes spawned by the init(8) process for the problematic modem.  In  addition  the
       faxq(8) process automatically disables use of the modem for servicing outbound jobs.

       The  devid  argument  is the identifier derived from the name of the modem's device file by substituting ``_'' characters for ``/'' charac-
       ters; e.g.  term_10 for /dev/term/10.  The device argument is the name of the character special device associated with the modem.

       If there exists an executable file /var/spool/hylafax/etc/resetmodem then that file will be executed upon execution of the wedged script in
       an effort to recover the modem.

FILES

       /usr/lib/sendmail    for delivering mail

SEE ALSO

       faxq(8), hylafax-config(5)

								  October 3, 1995							 WEDGED(8)