My notes, things I have learned, and documentation I have created.

Various useful lsof options:

To view files open by a particular PID:
lsof -p pidnumber

To show processes and the port they are running on. This is a great command to find out not only process and port, but also the command and the PID.:
lsof -i -nP # The -n does not resolve the IP addresses and ports to names.

Source: http://sial.org/howto/debug/unix/lsof/

Sometimes you can get an out of Terminal licenses message when connecting from a client, even if there are still plenty of licenses available. This can be due to some corruption in the client registry. You just need to delete the following key, and try connecting again. You should get the same license from the Terminal server.

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\MSLicensing\Store\LICENSE000\ClientLicense

To check the current settings for postifx:

postconf mailbox_size_limit
The default mailbox size is 51200000.

postconf message_size_limit
The default message size is 10240000.

To change it:

vi /etc/postfix/main.cf
…
mailbox_size_limit = newmailboxsize
message_size_limit = newmessagesize
…

Restart postfix

Download the kernel-2.6.xx-x.*.src.rpm from http://ftp.redhat.com/pub/redhat/linux/enterprise/5Server/en/os/SRPMS/.

rpm -ivh kernel-2.6.xx-x.*.src.rpm

cd /usr/src/redhat/SPECS

rpmbuild -bb –target=i686 kernel-2.6.spec

cd /usr/src/redhat/RPMS

rpm -ivh kernel-2.6.xx-x.*.rpm

Here are some common keyboard commands used in other operating systems.

Page Up = Fn+UpArrow
Page Down = Fn+DownArrow
Home = Fn+LeftArrow
End = Fn+RightArrow
Del = fn+delete

# ls -la .procmailrc
-rw-r–r– 1 username users 129 Mar 13 15:08 .procmailrc

# cat .procmailrc
SHELL=/bin/sh
MAILDIR=$HOME/Mail
DOMAIN=mydomain.com
LOGFILE=$HOME/.procmailrc.log

:0
* ^From email@address.com
/dev/null

You can use the following command to simply rebuild all the indexes on a table.

DBCC DBREINDEX(tablename, “”,0)

The command “system_profiler” will return all the hardware information.

Other useful commands include sw_vers, hostinfo, and uname -a.

To utilize the automatic update facility in WordPress 2.7 and greater, the files need to be owned by the same user as the user the web server runs as. For example, a linux installation would need to have the files owned by the apache user and group. I did this by using the following command:

chown -R apache.apache /usr/local/wordpress

From here, the update worked fine. The google analytics plugin worked fine as well.