Sometimes you need to specify the from address, but I'm always forgetting the syntax.
echo "The message" | mail -s "The subject" me@here.com -- -f sender@someplace.com

One issue I ran into though is their documentation for the Mac is based on a wired ethernet connection.  Who uses patch cables at home anymore?  Luckily I found a link to a site that shows how to get around this on the Mac.  You can read about hit here: http://qmail.jms1.net/djbdns/osx.shtml#dhcp-nameserver

BUT, I was pleasantly surprised to find out how simple this really was. If you want to perform an action the output of a loop in bash then you just pipe done into the fuction you want performed. See the example below.

for VAR in $VARS; do
{someaction}
done | sort -n

Cool, right?

So, back to the all knowing Google. Turns out you have to quote your variable when you use it if you don’t want bash to truncate the spaces. So I quoted my variable when using it and all is good.

BUFFER="$VAR                                                                "
NICE_VAR=`echo "$VAR" | cut -c -15`
echo "$VAR $VAR2"

1. It is a good idea to make a backup of the directory you are moving just in case something goes horribly wrong.
# cp -rp {data_dir} {backup_dir}

2. log in as the oracle user
# su -l oracle

3. move the database files
# mv {data_dir} {new_data_dir}

4. Set SID, log into database.
# export ORACLE_SID={ORACLE_SID}
# sqlplus /nolog
SQL> connect /as sysdba;

5. Create pfile from spfile
SQL> create pfile from spfile;

6. In another terminal, modify the newly created pfile. It is usually called init{SID}.ora and can be in different directories. Look in udump, dbs, and other directories until you find the newly created pfile. Check the date to make sure it is the one you are looking for. Now, fix the directories for the control_files variable.

7. Go back to the original terminal and create spfile from pfile;
SQL> create spfile from pfile;

8. Mount database.
SQL> startup mount;

9. Alter the database to look in the new location for the data files and redo logs. Below is an example. (Do this for all data and redo logs.)
SQL> alter database rename file ‘/home/oracle/oradata/{SID}/sysaux01.dbf’ to ‘/usr/local/app/oracle/oradata/{SID}/sysaux01.dbf’
SQL> alter database rename file ‘/home/oracle/oradata/{SID}/redo01.log’ to ‘/usr/local/app/oracle/oradata/{SID}/redo01.log’

10. Open database.
SQL> alter database open;

Now it should hopefully come up properly. You man want to shut it down and bring it up once more to make sure everything is working properly.

mysqldump -p -e -c --add-drop-table -r table.sql dbname table

Warning: The –add-drop-table will cause it to drop the existing table when you import.

You can import this with the command

mysql -p dbname < table.sql

http://linux.dell.com/repo/hardware/

Also check out http://linux.dell.com/wiki/index.php/Repository/software
and http://linux.dell.com/wiki/index.php/Repository/firmware

rpm -qa > BeforeUpgrade.txt

After Upgrade:

rpm -qa > AfterUpgrade.txt

Then I can compare them so that I know which packages were not upgraded and I can figure out why the did not upgrade.

cat BeforeUpgrade.txt AfterUpgrade.txt | sort | uniq -c | sort -n | grep "^\ *2"

The net command is part of the samba package and can be used for much more than rebooting, like adding or deleteing users, etc.  Read the man file for more info.

convert test.pdf test.jpg

This will create a jpeg for each page of the pdf.  Simple right?  Plus it supports many input and output formats.