Linux Logging Basics | LAS | s22e05

chris — Sun, 24 Jun 2012 12:52:33 +0000

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We get you familiar with the essentials of Linux logging, our tips for the logs to check, and the tools to use. And graphical tools to view your logs.

Plus: NVIDIA’s big loss, Ubuntu’s SecureBoot plans, and some sad news for QT.

Then: Chris has big news about Jupiter Radio, our new Airtime powered community project!

All this week on, The Linux Action Show!

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Show Notes:

News:

Linux Logs Explained:

Syslog

There are two services, or daemons, that control logging, klogd and syslogd. klogd only deals with kernel messages. syslogd deals with other system messages, such as applications. You can configure the behavior of both by editing the files /etc/syslog.conf and /etc/sysconfig/syslog
/var/log/messages

The messages log is the core system log file. It contains the boot messages when the system came up as well as other status messages as the system runs. Errors with IO, networking, and other general system errors are reported in this file. Other information, such as when someone becomes root, is listed here as well. If services are running, such as DHCP servers, you can watch the action in the messages file. /var/log/messages is generally your first place to look when you are troubleshooting.
dmesg

To get a quick view of the boot log for the last system boot, use the command dmesg. It generally puts out a lot of text, so you will generally want to pipe it through a viewer.
dmesg | more
tail

Sometimes you want to keep an eye on a log file as activity is occurring. Tail is designed to show the last few lines of a text file. By adding the -f switch, tail will continue to show new output as it occurs.
tail -f /var/log/messages
more

More works the same as the DOS version. You can point it to a file, or pipe output through it to see the information one screen page at a time. For example, to show the contents of the Xfree86 startup log file one screen page at a time:
more /var/log/XFree86.0.log
less

Less is another text viewer, but it allows you to scroll through a file and search for information.
less /var/log/messages
logger

You may want to put your own messages into the log file. You could just append the log message to the correct text file, but you would have to duplicate the log information style. Also, you would have to change your code if the logging system had been customized. The logger command lets you send your own messages to the logging facility. Use it in scripts to provide messages about execution and errors.
Remote Syslog

You can have it sent to a remote host where that host will process it according to its own syslogd configuration. Remote logging is an excellent security feature.

GUI Linux Log Viewers:

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The post Linux Logging Basics | LAS | s22e05 first appeared on Jupiter Broadcasting.

Movie Monster Madness | Jupiter@Nite | 8.26.10

chris — Thu, 26 Aug 2010 22:32:34 +0000

Looking toward this weekend, we see the most promising movie release to be a thriller of epic proportions: The Last Exorcism. And while we’re unlikely to hop down to the cineplex to catch this one on the big screen, it’s got us reminiscing about the movie monsters that have shaped our darkest nightmares over the years.

We’ll review some of these demons and creeps and things that go bump in the night, as well as reveal some of the psychological inner workings as to WHY we find them so terrifying.

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Tonight’s Show Notes & Download Below:

Chris’ Monster Fears:
The Terminator
Jaws
28 Days Later Zombies
War of the Worlds – The Alien ships are scary!
Little Girls – Like the Red Queen from Res Evil, or the Ring Girl

Honorable Scary Mentions:
Dr. William Weir (Event Horizon)

Jeremy’s Monster Fears:
Freddie Kruger
Jaws
The Thing (video)
Tim Curry in LEGEND
Large Marge (Pee Wee’s Big Adventure)
Mirrors

The Psychology of Horror
As unpleasant as fear can be to experience, there is also an enormous attraction to it when portrayed in a safe manner such as a fiction story.

The Monster Squad! (1987)
The greatest collection of movie monsters to ever grace the big screen simultaneously.
It’s getting a remake!!!

Download:

The post Movie Monster Madness | Jupiter@Nite | 8.26.10 first appeared on Jupiter Broadcasting.

Terminator – Jupiter Broadcasting