Hello, I'm new to this forum. I just did my install of Linux... CentOS 6.8 running on a VPS.

I installed a shell script to monitor the server, and setup a cron job to run the script daily. The script is supposed to email me the results... The first time the script ran, I received the following error in my mail spool:

line 6: /bin/mail: No such file or directory

It appears that there is no "mail" program running.

I did some research trying to ascertain whether there is an MTA installed, and whether it's running. I found this command:

# rpm -q sendmail postfix exim qmail
package sendmail is not installed
postfix-2.6.6-6.el6_7.1.x86_64
package exim is not installed
package qmail is not installed

The above seems to indicate that I have Postfix installed. I then executed the following commands:

# postfix stop
postfix/postfix-script: stopping the Postfix mail system
# postfix start
postfix/postfix-script: starting the Postfix mail system

So it appears Postfix is running. But it's not "working". Since I just installed Linux, does Postfix need to be setup or configured in any way?

Or more generally, how do I get "mail" working? What next?

Thank you in advance...

Im not using CentOS but looking at the package list they are using mailx and in the rpm of mailx the binary looks to be /bin/mailx
Check to make sure mailx is installed and if it you just need a symlink.

Thanks for your reply. mailx is NOT installed. postfix IS installed.

1. Should I use postfix? If not, what?

2. If postfix, what do I need to do next to get it working - what's the procedure?

https://wiki.centos.org/HowTos/postfix

Read x 2
Try.
Ask.

postfix is the mta. you'll need mailx (yum install mailx) as a client to actually send mail.
FWIW its in the Base repo which is normally enabled at install time.