Linux Bash How to show line numbers in vi

This is more of a reminder to myself than anything else. When I am working directly on the Linux server (Centos is my flavor of choice), I often need to find a line number. I have used vi and other editors for a long long time (since the days when unicorns wandered the earth), but I still forget some things. Like today, I had to look up how to turn on line numbers in vi.

It really is simple.

Hit the "Esc" escape key and type:

:set number

On some flavors of Linux:

:set nu

also works.

Easy peasy, now if I can just remember this.

Sending Mail From Linux Using Bash Shell

This was a quick and dirty bash shell for send email from a command line. The body of the email was the same, and the email was going out to a bunch of people.

Using vi, I created a file in /home/tmp/mailmessages with the body of what I want to write. For this example it is /home/tmp/mailmessages/myFileTellingEveryone

Then I created the following bash script, name mymailer and put in the /bin or /sbin directory:

#!/bin/bash

IFS=":-;"

#FILE= "/home/tmp/mailmessages/$3"

#echo $(basename "$2")

mail -s $(basename "$2") $(basename "$1") < /home/tmp/mailmessages/$(basename "$3")

Do a chmod so that you can execute it (chmod 777 works for me) and now all I do is type:

#mymailer me@me.com "This is my Subject" myFileTellingEveryone

I just keep changing the email address and I can send out this way.