Zenovation's Blog » Shell

Advanced Bash Scripting Guide

Michael — Sun, 10 Jul 2011 06:36:14 +0000

This guide really is a complete resource for understanding bash syntax; very easy to get around and understand.

Sending Mail From Bash Scripts with an Attachment

Michael — Tue, 27 Apr 2010 14:06:02 +0000

Here is a great little tut on getting started in Bash. I’d recommend it to anyone trying to hack their way into a shell script.

Here is a quick script for sending an email:

^?View Code BASH

#!/bin/bash
 
# Subject of email
SUBJECT="Test email with attachment from a bash script"
 
# Where to send it
TO_ADDRESS="your@email.com"
 
# Where the attachment is
ATTACHMENT_FILE="/tmp/attachment.txt"
 
# For fun, let's put something into the attachment
echo "This goes into the file."  >  $ATTACHMENT_FILE
echo "This appends to the file." >> $ATTACHMENT_FILE
 
# send the message
/bin/mail -s "$SUBJECT" "$TO_ADDRESS" < $ATTACHMENT_FILE

Starting services automatically in CentOS

Michael — Mon, 04 Aug 2008 03:24:03 +0000

Had a service in CentOS 4 server that went down every time the box rebooted. Got tired of starting it manually so I had to go find the command to start it automagically.

Surprisingly, it has nothing to do with “service”, which is how you start/stop it manually. It has the very unintuitive command “chkconfig” to make it start on boot. What a choice: chckconfig!

Oh well, here it is:

^?View Code BASH

chkconfig --add httpd
chkconfig httpd on

Finding group/world writable files and directories in Linux

Michael — Mon, 26 Nov 2007 17:30:51 +0000

^?View Code BASH

find / -type f \( -perm -2 -o -perm -20 \) -exec ls -lg {} \;

CVS tunnel via CLI SSH

Michael — Sat, 05 May 2007 08:55:25 +0000

^?View Code BASH

/usr/bin/ssh -v -a -L 2401:localhost:2401  cvsnobody@ns2.cyterm.com