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carbon
Guru
Joined: 27 Jun 2003
Posts: 455
Location: New York
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 Posted: Tue Aug 05, 2003 1:28 pm Post subject: how to write scripts? |
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i want to write a script that will send me a email to tell me my dynamic ip has changed or even go to a website and update it.
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Carbon |
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kopfarzt
Apprentice
Joined: 05 Apr 2003
Posts: 170
Location: Vienna, Austria
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kashani
Advocate
Joined: 02 Sep 2002
Posts: 2032
Location: San Francisco
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| Posted: Tue Aug 05, 2003 6:29 pm Post subject: |
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emerge dyndnsupdate
emerge -s is your friend.
kashani
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revertex
l33t
Joined: 23 Apr 2003
Posts: 806
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| Posted: Thu May 27, 2004 6:22 pm Post subject: |
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I like this one, it's not mine, i just did some changes to suit my needs. | Code: |
wget -O - -q http://www.whatismyip.com | grep h1 | cut -f 4 -d " " | mail yourmailaddress@domain |
need mailx to send mail, but you may use mutt instead.
just put in your cronjob.
you don't need to register in any service to use it, i find it useful for people like me that don't host services like web servers but need to know your ip for things like ssh. |
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blitzkrieg
n00b
Joined: 22 Apr 2004
Posts: 22
Location: Canada
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| Posted: Thu May 27, 2004 7:35 pm Post subject: |
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| Code: |
#!/bin/bash
OLDIP=`cat ~/.ip`
NEWIP=`wget -O - -q http://www.whatismyip.com | grep h1 | cut -f 4 -d " "`
if [ "$OLDIP" != "$NEWIP" ] ; then
echo "$NEWIP" > ~/.ip
echo "$NEWIP" | mail frank@frank-networks.com -s "IP has changed to $NEWIP"
fi
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install into your crontab to run as often as you like: it will only mail you when the ip address changes. |
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revertex
l33t
Joined: 23 Apr 2003
Posts: 806
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| Posted: Thu May 27, 2004 8:38 pm Post subject: |
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Thank's blitzkrieg!
Much better than mine! |
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sparks
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Joined: 05 Mar 2003
Posts: 331
Location: Nashville, TN
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| Posted: Sun Jun 06, 2004 7:44 am Post subject: |
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| blitzkrieg wrote: | | Code: |
#!/bin/bash
OLDIP=`cat ~/.ip`
NEWIP=`wget -O - -q http://www.whatismyip.com | grep h1 | cut -f 4 -d " "`
if [ "$OLDIP" != "$NEWIP" ] ; then
echo "$NEWIP" > ~/.ip
echo "$NEWIP" | mail frank@frank-networks.com -s "IP has changed to $NEWIP"
fi
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install into your crontab to run as often as you like: it will only mail you when the ip address changes. |
Thats a great script but when I run it, i receive this error.
| Code: | /home/ben/.scripts/ip-change: line 7: mail: command not found
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Now, I have postfix installed and setup correctly. How can I use it to send this e-mail. Thanks
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Regor
Guru
Joined: 06 Aug 2002
Posts: 545
Location: 39° 2' 48" N, 120° 59' 2" W
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| Posted: Sun Jun 06, 2004 9:22 am Post subject: |
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| sparks wrote: |
Thats a great script but when I run it, i receive this error.
| Code: | /home/ben/.scripts/ip-change: line 7: mail: command not found
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Now, I have postfix installed and setup correctly. How can I use it to send this e-mail. Thanks |
You don't. Not directly anyway. Internet email is split into 3 different functions: transport, delivery, and user interface. It is nearly always the case that 2 completely different programs are required in order to fullfil all of these functions and it's fairly common that 3 or more will come into play.
Postfix is primarily a Mail Transport Agent (MTA), (it can also serve as an MDA) and is not suitable for use directly by a user. What you need is a MUA, which is exactly what the "mail" program the script calls is. Other common MUAs include mutt, elm, pine, sylpheed, thunderbird, evolution, kmail, etc.
Ok, now that the lecture is over the short answer is "emerge mail-client/mailx". 
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