su: /bin/bash: Permission denied
 

I am having a problem while i am trying to start a service , i got the below error

anyone have the idea to fix this, please help
Thank You.......

can you be more specific. What command did you try and created this error?

This happen when i am trying to restart a service name call "nagios"

Anyone knows, please help
Thank You.........

probably the file /etc/rc.d/init/nagios has no execute permissions.
SO try:
or
or give execute permission to the file:
and try your command again.
I would recomment the first 2 options.

*EDIT*
try to see the file permissions.

Still cant solve the problem, anyone has idea on it?
Anyway thanks for the help perfect_circle :)

are you root?
you need to be logged in as root to restart a server.
If not type in the terminal to became root.
What distro are u using?

I already login as root, but i dont know why this problem prompt out......
I am using Fedora Core 4

I don't think this is the way to restart a service in fedora. This looks more like the slackware way :) Search your gnome menus. I'm pretty sure there is a utility for this.

/etc/rc.d/rc.local
#!/bin/sh
#
# This script will be executed *after* all the other init scripts.
# You can put your own initialization stuff in here if you don't
# want to do the full Sys V style init stuff.

touch /var/lock/subsys/local
/usr/local/sbin/vsftpd&
POSTGRESDIR=/usr/local/pgsql
if [ -x $POSTGRESDIR/bin/postmaster -a -d $POSTGRESDIR/data ];then
rm -f /tmp/.s.PGSQL.5432
su - postgres -c "postmaster -S -i -B 2048"
echo -n 'postmaster'
fi

# reboot the computer display the message
su: /bin/bash: Permission denied
OS : Fedora 4

Do you get the same error when you run the following as root:

What happens if you login as postgres and run the following:

Is postgres the correct username?

In Fedora, you should use the following to restart a command: