Come trasmettere email dalla linea di ordine di Linux

Alcune altre opzioni utili nell'ordine della posta sono:

- oggetto di s (L'argomento di posta)
- email address di c (Contrassegni una copia a questo “email address„, o il cc)
- email address di b (Contrassegni una copia con carta carbone cieca a questo “email address„, o BCC)

Qui è come potreste usare queste opzioni:

# echeggi “il benvenuto al mondo di Calvin la n Hobbes„ | posta - mondo„ calvin@cnh.com di s “ciao - c hobbes@cnh.com - b susie.derkins@cnh.com

MUTT

Uno degli svantaggi importanti di usando l'ordine della posta è che non sostiene la trasmissione dei collegamenti. il mutt, d'altra parte, lo sostiene. Ho trovato questa caratteristica particolarmente utile per gli scritti che generano i rapporti o i sostegni non-testuali che sono relativamente piccoli nel formato che gradirei a sostegno altrove. Of course, mutt allows you to do a lot more than just send attachments. It is a much more complete command line mail client than the “mail” command. Right now we’ll just explore the basic stuff we might need often. Here’s how you would attach a file to a mail:

# echo “Sending an attachment.” | mutt -a backup.zip -s “attachment” calvin@cnh.com

This command will send a mail to calvin@cnh.com with the subject (-s) “attachment”, the body text “Sending an attachment.”, containing the attachment (-a) backup.zip. Like with the mail command you can use the “-c” option to mark a copy to another mail id.

SENDING MAIL FROM A SHELL SCRIPT

Now, with the basics covered you can send mails from your shell scripts. Here’s a simple shell script that gives you a reading of the usage of space on your partitions and mails the data to you.

#!/bin/bash
df -h | mail -s “disk space report” calvin@cnh.com

Save these lines in a file on your Linux server and run it. You should receive a mail containing the results of the command. If, however, you need to send more data than just this you will need to write the data to a text file and enter it into the mail body while composing the mail. Here’s and example of a shell script that gets the disk usage as well as the memory usage, writes the data into a temporary file, and then enters it all into the body of the mail being sent out:

#!/bin/bash
df -h > /tmp/mail_report.log
free -m >> /tmp/mail_report.log
mail -s “disk and RAM report” calvin@cnh.com

Now here’s a more complicated problem. You have to take a backup of a few files and mail then out. First the directory to be mailed out is archived. Then it is sent as an email attachment using mutt. Here’s a script to do just that:

#!/bin/bash
tar -zcf /tmp/backup.tar.gz /home/calvin/files
echo | mutt -a /tmp/backup.tar.gz -s “daily backup of data” calvin@cnh.com

The echo at the start of the last line adds a blank into the body of the mail being set out.

This should get you started with sending mails form the Linux command line and from shell scripts. Read up the “man page” for both mail and mutt for more options.