Linux Tech Tips
This page will grow as I have time; for now I just have:
I am often on the EFNet or irc.openprojects.net #linux channel, username ictx
giving free support; for inexpensive
Linux system administration check this
special deal, sometimes available even cheaper on Ebay.
Another alternative is to post your specific job requirements to
and let me and other programmers bid on it.
Still another option, for things that need only answers and not hands-on
QuickQuestions.com, which will eventually be expanded into a full-service
site like OddWebJobs.
- A basic ipchains firewall you
can put into your startup routine.
- A perl script that monitors logs and alerts
you to anything matching, or not matching, a particular pattern
- Does your Slackware installation identd you as '1000'? It's showing
the UID rather than your username; fix supplied by aero_
(firstname.lastname@example.org) just before 2 AM EDT on 2002-08-02:
comment out or remove the line "uid-only=yes" in /etc/identd.conf.
Setting it to 'no' does not fix it, for some reason.
- Ever tried using a CGI to show manpages? I'd been trying for years, off
and on, in my "spare time"; one night I stayed up all night on it, finally
realizing that 'less' uses isatty(3) to determine if it is outputting to
a terminal, and if not, dumps the raw data, which shows up as M M A A N N
on the screen, since backspaces are rendered in html like any other spaces.
So, the time I spent starting a termcap/terminfo
description for an 'html' terminal was probably wasted. But anyway, once
I had that established, it wasn't hard coming up with a quick bash
to do what I wanted, man man for example.
- After attempting to install LIRC, having already downloaded almost 100MB
of files and had problems compiling it, I gave up and decided to implement
an extremely simple instant messaging protocol using perl. The first test
programs for it are jcimsend and jcimrecv. I didn't have to modify my firewall
because I was already allowing UDP on high-numbered ports for DNS and
- I've been concerned about the lack of security in identd for a while,
as there have been some exploits in various daemons and, while I couldn't get
one of the exploits on the net to give me a rootshell, I still don't trust
any code I didn't write myself (not that I can trust that,
either, but at least
I can hopefully fix it easier if I find it's broken). Anyway, I finally
accomplished two things: (1) learned the basics of the auth protocol from
rfc1413, and (2) cobbled together enough python for a working "fake" identd
that runs from inet. This and
identcheck (I know, I could have just telneted
to the port) are my first two working python scripts, klunky as they are, so
to me it was worth the effort.
The current date is Saturday, 06-Jun-2020 19:14:13 UTC
This page was last modified Tuesday, 25-Mar-2003 04:52:29 UTC
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