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Top Forums Shell Programming and Scripting How To Run A For Loop In A Remsh? Post 302506119 by Korn0474 on Friday 18th of March 2011 02:09:17 PM
Old 03-18-2011
How To Run A For Loop In A Remsh?

Hi all,

I'm trying to remsh to another server and then execute a for loop command there but I'm getting unexpected errors and would appreciate any suggestions.

Ideally what I want to do is this:
Code:
for host in `cat host_file`
do
  remsh $host -n "
     cd /home/
     for DATABASE in `ls -d db[1-8]*`
     do
          [execute program] $DATABASE
     done"
done

Now my understanding is that you can't use new lines for remsh logic so the code would have to look like this:
Code:
for host in `cat host_file`
do
  remsh $host -n "cd /home/; for DATABASE in `ls -d db[1-8]*`; do; [execute program] $DATABASE;  done"
done

Unfortunately I get the following error:
Code:
ksh: syntax error at line 1 : `;' unexpected

So clearly I'm doing something wrong. I've tried chaning the placement of the semi colons but to no avail. Smilie
 

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DROP 
DATABASE(7) PostgreSQL 9.2.7 Documentation DROP DATABASE(7) NAME
DROP_DATABASE - remove a database SYNOPSIS
DROP DATABASE [ IF EXISTS ] name DESCRIPTION
DROP DATABASE drops a database. It removes the catalog entries for the database and deletes the directory containing the data. It can only be executed by the database owner. Also, it cannot be executed while you or anyone else are connected to the target database. (Connect to postgres or any other database to issue this command.) DROP DATABASE cannot be undone. Use it with care! PARAMETERS
IF EXISTS Do not throw an error if the database does not exist. A notice is issued in this case. name The name of the database to remove. NOTES
DROP DATABASE cannot be executed inside a transaction block. This command cannot be executed while connected to the target database. Thus, it might be more convenient to use the program dropdb(1) instead, which is a wrapper around this command. COMPATIBILITY
There is no DROP DATABASE statement in the SQL standard. SEE ALSO
CREATE DATABASE (CREATE_DATABASE(7)) PostgreSQL 9.2.7 2014-02-17 DROP DATABASE(7)
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