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Full Discussion: Running remote shell script containing sql statements
Top Forums Shell Programming and Scripting Running remote shell script containing sql statements Post 302073629 by x96riley3 on Tuesday 16th of May 2006 09:58:35 AM
Old 05-16-2006
This type of stuff seems to just keep coming back. People want to run scripts remotely. I've tried every way I can think of and this is the best way. You not only get functionality but you get security as well. Every Unix environment needs a way to issue shell scripts, perl script, SQL scripts to remote servers. I have posted the following example already but I will do it again. Everytime I go to a new company the first thing I do is build an issuance process. A way to issue script remotely outside of using some scheduler like Maestro or Control -m.





This is really a multi step process. You need to setup SSH correctly and create a key pair and passphrase. Then you need to load your keys into the SSH agent so that you don't get prompted for a passphrase. The SSH agent will handle passing your passphrase to the other systems.

Example:

#ssh-add
Adding identity: /home/tester/.ssh2/id_dsa_1024_defender.pub
Need passphrase for /home/tester/.ssh2/id_dsa_1024_defender.pub
(1024-bit dsa, tester@defender, Sun Apr 30 2000 21:39:13).
Enter passphrase:

#ssh server date
Wed May 10 14:06:57 EDT 2006
#

#Now that you have SSH setup. You can take any script and scp the script to the remote server.



Sample script below
###############################################
#!/bin/sh

LOG="/tmp/MYTEST.log
##################
function if_error
##################
{
if [[ $? -ne 0 ]]; then # check return code passed to function
print "$1 TIME:$TIME" | tee -a $LOG # if rc > 0 then print error msg and quit
exit $?
fi
}

chown root:root /etc/passwd
if_error "Failed chowning /etc/passwd to root:root"

chmod 700 /etc/passwd
if_error "Failed chmoding /etc/passwd to 700"

rm -rf /etc/somedir
if_error "Failed deleting /etc/somedir"
################################################

#Okay..So SSH is working and you got a little test script with the proper error checking in it. Also, I used the tee command to redirect the output of the script to the screen and to a log file in tmp.

scp $USER@$HOST:$PATH/$SCRIPT $USER@$HOST:/tmp/$SCRIPT
ssh -l $USER $HOST chmod 700 /tmp/$SCRIPT
ssh -l $USER $HOST /tmp/$SCRIPT
ssh -l $USER HOST rm /tmp/$SCRIPT

1. Copied script to server
2. Changed permissions
3. Executed script that will write to log file and screen cause I wrote it like that.
4. rm the script


Hope this is helpful.

-X
 

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LEARN ABOUT OSX

rsh

RSH(1)							    BSD General Commands Manual 						    RSH(1)

NAME

     rsh -- remote shell

SYNOPSIS

     rsh [-46dn] [-l username] [-t timeout] host [command]

DESCRIPTION

     The rsh utility executes command on host.

     The rsh utility copies its standard input to the remote command, the standard output of the remote command to its standard output, and the
     standard error of the remote command to its standard error.  Interrupt, quit and terminate signals are propagated to the remote command; rsh
     normally terminates when the remote command does.	The options are as follows:

     -4    Use IPv4 addresses only.

     -6    Use IPv6 addresses only.

     -d    Turn on socket debugging (using setsockopt(2)) on the TCP sockets used for communication with the remote host.

     -l username
	   Allow the remote username to be specified.  By default, the remote username is the same as the local username.  Authorization is deter-
	   mined as in rlogin(1).

     -n    Redirect input from the special device /dev/null (see the BUGS section of this manual page).

     -t timeout
	   Allow a timeout to be specified (in seconds).  If no data is sent or received in this time, rsh will exit.

     If no command is specified, you will be logged in on the remote host using rlogin(1).

     Shell metacharacters which are not quoted are interpreted on local machine, while quoted metacharacters are interpreted on the remote
     machine.  For example, the command

	   rsh otherhost cat remotefile >> localfile

     appends the remote file remotefile to the local file localfile, while

	   rsh otherhost cat remotefile ">>" other_remotefile

     appends remotefile to other_remotefile.

FILES

     /etc/hosts
     /etc/auth.conf

SEE ALSO

     rlogin(1), setsockopt(2), rcmd(3), ruserok(3), auth.conf(5), hosts(5), hosts.equiv(5), rlogind(8), rshd(8)

HISTORY

     The rsh command appeared in 4.2BSD.

BUGS

     If you are using csh(1) and put a rsh in the background without redirecting its input away from the terminal, it will block even if no reads
     are posted by the remote command.	If no input is desired you should redirect the input of rsh to /dev/null using the -n option.

     You cannot run an interactive command (like ee(1) or vi(1)) using rsh; use rlogin(1) instead.

     Stop signals stop the local rsh process only; this is arguably wrong, but currently hard to fix for reasons too complicated to explain here.

BSD
								 October 16, 2002							       BSD
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