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Login notification script

Sends you an e-mail at each user login on linux systems and sends the output of some commands as attachments :

netstat (connections/servers)
iptables (firewall configuration, on root login only)
ps (processes list)
who (logged in users and hostnames)

Prerequisites

Install mutt, e-mail client
- On Debian/Ubuntu : sudo apt-get install mutt or apt install mutt
A configured MTA/SMTP server in order to send emails.

Installation

Copy the script in :
- /etc/profile.d/login-notify.sh .

Configuration

Change (line 17) my-address@my-mail-provider.tld with the destination mail address.
Change (line 18) security@my-server-domain.tld with the source mail address.

Permissions

Set the owner/group to root user :
- sudo chown root:root /etc/profile.d/login-notify.sh
Set Read/Write/Execute to root user only, others (group and others) to Read/Execute :
- sudo chmod 755 /etc/profile.d/login-notify.sh

Test

As root : sudo /etc/profile.d/login-notify.sh
and : /etc/profile.d/login-notify.sh