Re: How to stop squirrelmail temporarily

On Wed, 2008-12-24 at 19:20 +0800, Stephen Liu wrote:
--- Yuriy Kuznetsov <yuriy.kuznetsov@xxxxxxxxx> wrote:

Try to run the following on on your box and see what processes are
listen to
those ports:

# netstat -lnp

Normally these ports are used by imapd - normal and secure
connections.

...

# netstat -lnp | grep 993
tcp6 0 0 :::993 :::*
LISTEN 2846/couriertcpd

# netstat -lnp | grep 143
tcp6 0 0 :::143 :::*
LISTEN 2834/couriertcpd


Perdition also needs port 993 and 143. They are taken by courier.

...

# /etc/init.d/courier-imap stop
Stopping Courier IMAP server: imapd.

...

# netstat -lnp | grep 993
tcp6 0 0 :::993 :::*
LISTEN 2846/couriertcpd


Why port 993 is still taken by courier? The latter is NOT running.

The SSL one is. Try:

# /etc/init.d/courier-imapd-ssl stop

Now, on a slightly different topic:

# ps aux | grep perdition
root 3114 0.0 2.0 2864 692 pts/2 S+ 11:02 0:00 grep
perdition


# kill -9 692
-bash: kill: (692) - No such process


# kill -9 2864
-bash: kill: (2864) - No such process


# kill -9 3114
-bash: kill: (3114) - No such process

It's a good idea to have a think, and know what you're looking at before
firing off "kill -9" at random numbers.

If you can't remember what column is which (I can't), try something like
this:

$ ps aux|head -n1
USER PID %CPU %MEM VSZ RSS TTY STAT START TIME COMMAND

Your first attempt is at the RSS - Not a pid. There may have been a
process with that pid, but you killed it, giving it no chance to clean
up after itself.

Your second attempt is at the VSZ - again, not a pid. Again, any process
that may have had that pid is now gone.

Your third attempt is indeed the pid - of the grep command you were
using to find it. It's gone already by the time you tried to kill it.

Also, please don't cc me on list mail.

Richard



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