How to stop direct running of executable


 
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Old 08-19-2010
How to stop direct running of executable

Dear Sir,

I am using CentOS-5.2(64-bit) as an server side OS in a cluster with 32 slaves+1 Master. My question is, after compiling a file with ifort, I am suppose to get a executable(say a.out). I want my users to do ssh slave.local and then do ./a.out
But is it possible to restrict users launch the job(i.e. ./a.out in master node) directly in the master node?
If users fires job in master node, then at times the master node gets crashed. The reason is, the jobs are high end computational codes that may run for a month!
Can you please guide me to the procedures of disabling the direct launch of job in master node?
Thanks

S N Banerjee
India
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PG_CTLCLUSTER(8)					 Debian PostgreSQL infrastructure					  PG_CTLCLUSTER(8)

NAME
pg_ctlcluster - start/stop/restart/reload a PostgreSQL cluster SYNOPSIS
pg_ctlcluster [options] cluster-version cluster-name action -- [pg_ctl options] where action = start|stop|restart|reload|promote DESCRIPTION
This program controls the postmaster server for a particular cluster. It essentially wraps the pg_ctl(1) command. It determines the cluster version and data path and calls the right version of pg_ctl with appropriate configuration parameters and paths. You have to start this program as the user who owns the database cluster or as root. ACTIONS
start A log file for this specific cluster is created if it does not exist yet (by default, /var/log/postgresql/postgresql-cluster- version-cluster-name.log), and a PostreSQL server process (postmaster(1)) is started on it. Exits with 0 on success, with 2 if the server is already running, and with 1 on other failure conditions. stop Stops the postmaster(1) server of the given cluster. By default, "smart" mode is used, which waits until all clients disconnected. With the --force option the "fast" mode is used which rolls back all active transactions, disconnects clients immediately and thus shuts down cleanly. If that does not work, shutdown is attempted again in "immediate" mode, which can leave the cluster in an inconsistent state and thus will lead to a recovery run at the next start. If this still does not help, the postmaster process is killed. Exits with 0 on success, with 2 if the server is not running, and with 1 on other failure conditions. This mode should only be used when the machine is about to be shut down. restart Stops the server if it is running and starts it (again). reload Causes the configuration files to be re-read without a full shutdown of the server. promote Commands a running standby server to exit recovery and begin read-write operations. OPTIONS
-o option Pass given option as command line option to the postmaster process. It is possible to specify -o multiple times. See postmaster(1) for a description of valid options. pg_ctl options Pass given pg_ctl options as command line options to pg_ctl. See pg_ctl(1) for a description of valid options. FILES
/etc/postgresql/cluster-version/cluster-name/pg_ctl.conf This configuration file contains cluster specific options to be passed to pg_ctl(1). SEE ALSO
pg_ctl(1), pg_wrapper(1), pg_lsclusters(1), postmaster(1) AUTHOR
Martin Pitt <mpitt@debian.org> Debian 2012-10-08 PG_CTLCLUSTER(8)