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Martin Hope
Codemwnci
Asked: 2014-08-25 08:34:45 +0800 CST
  • 6

I have been trying to get Wake On Lan to work on my Ubuntu server (14.04.1 LTS), which I have configured as a home NAS box. I have followed several tutorials to try to get this working, but for some reason, which I can't trace, it is not working.

The system is an old (4-5 year old) shuttle pc system (Shuttle SN78SH7), amd64 cpu (AMD Athlon 64 X2 7550).

Steps taken so far

  1. I have set WoL on my BIOS
  2. I have enabled WoL (method g) on eth0
  3. I have added a script so that eth0 stays as g on startup
  4. I can confirm that the green and orange lights on the network card are on

If I use ethtool, I can see the following, which I believe means it is configured as expected.

Supports Wake-on: g
Wake-on: g

I am using wolcmd (from a mac), to send the magic packet, to the MAC address, IP address, and subnet specified in ifconfig eth0 (to port 9).

I am not sure what the next steps should be to try to resolve the problem.

UPDATE

I can confirm that WoL does indeed work sometimes if I suspend (pm-suspend), but does not if I use (halt -p or shutdown -h now). Suspend seems to be really unstable, so using that is not likely to be a good answer for me.

networking
Martin Hope
Codemwnci
Asked: 2010-11-16 00:48:23 +0800 CST
  • 15

Is there a command, or package that can be used to calculate how much power my server is drawing? I am interested in knowing how much my server is costing me to run. I know the calculations of how much it would cost if drawing the full 300 Watts from the PSU, but I believe that this is unlikely to be the reality of it.

It is being used as a file and media server, so most of the time it will be reasonably idle. It is also running as a headless server, so all I am interested in, is the server itself.

power-management
Martin Hope
Codemwnci
Asked: 2010-10-27 23:50:31 +0800 CST
  • 8

I have a legacy Java program that outputs an SQL script. I then use Apache Derby to run that SQL on the target database (which is not on the same server as CRON).

When run via putty, this works fine. When run in windows this works fine. When run using CRON, Derby reads £ signs as ?.

If I look at the sql script generated (using VI), it contains the £ signs. If I check the database however, it contains ?.

Why would running this under CRON make the program behave any differently?

files cron encoding
Martin Hope
Codemwnci
Asked: 2010-10-20 00:00:41 +0800 CST
  • 14

I have a web application that outputs to a number of log files with performance information. One log file outputs code execution times and another outputs SQL timings. I have no control over the logger or the code that produces the log files, but I want to output the logs in one place.

Currently I am doing something like this

tail -f sqlLogs.log | grep sql-time
tail -f perflogs.log | grep exec-time

This outputs something to the console every time an SQL is executed in the application. But I have to run the code in two separate SSH sessions. However, what I want to be able to tail both files, in the same SSH session. Is this possible?

files tail grep
Martin Hope
Codemwnci
Asked: 2010-10-18 06:32:02 +0800 CST
  • 62

I have a local server running Ubuntu 10.04 headlessly. When I ssh to the server I get some core information about the system, such as 

System load:  0.0                Processes:           XXX
Usage of /:   2.5% of 452.69GB   Users logged in:     0
Memory usage: 10%                IP address for lo:   XXX.XXX.XXX.XXX
Swap usage:   0%                 IP address for eth0: XXX.XXX.XXX.XXX
Temperature:  40 C

What is the command to get this information to print again? I tried looking in the rc.local and the bash.bashrc file to see how this was run, but I could not find anything.

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