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- Perl - Shell - SSH - CUPS - Kernel - Mail - Networking - Virtualization - Tape Drives - Serial - Modems
| Title | Date | Comments | |||
|---|---|---|---|---|---|
| Early reminders for first Monday of month events | 2012 10 | ||||
| - I kept forgetting to send our club meeting notices to the newsletter. Google Calendar couldn't help me, so I wrote this script. - | |||||
| VMware Fusion vs. Parallels Desktop | 2012 10 | 2012/10/17 BruceGarlock | |||
| - Similarly priced, and VMware does have the advantage in premade machines, but I like Parallels better. - | |||||
| Here files (shell scripting) | 2012 10 | 2012/10/09 TonyLawrence | |||
| - Once again, I've been bitten by not having read the manual recently. This bite really annoyed me. - | |||||
| Upgrading to Ubuntu 12.04 LTS Server | 2012 10 | 2012/10/25 TonyLawrence | |||
| - My upgrade from 10.04 LTS to 12.04 LTS went faster than I expected, but there were surprises at the end. - | |||||
| No clobber scp - scp without overwriting | 2012 10 | 2012/10/07 TonyLawrence | |||
| - Although you usually want scp to update files, there are times when you definitely do not. I wrote this script to avoid overwriting existing files. - | |||||
| Using Kerio's Linux Versions | 2012 10 | ||||
| - Kerio offers Linux versions of all their products, either as virtual machines or Linux packages. Many Windows users avoid these, but should not. - | |||||
| Kerio Connect Mail Server Configuration Guide | 2012 09 | ||||
| - Important things to know about Kerio Connect Mail Server configuration. Don't miss these settings and features! - | |||||
| Kerio Troubleshooting | 2012 05 | ||||
| - There are only a very few things that will completely prevent Kerio Mailserver from starting. Usually this would come from a confused or mangled configuration file, but there are other conditions that can cause Kerio to refuse to start. - | |||||
| Simple outgoing email for SCO Unix (and Linux) | 2012 02 | 2012/02/27 TonyLawrence | |||
| - Configuring MMDF or Sendmail on SCO Unix was never fun and it only gets worse as fewer people care about any of it. Here is a simple fix for scripted outgoing email - | |||||
| SATA RDX backup cartridge report for BackupEDGE | 2011 11 | 2011/11/23 BillMohrhardt | |||
| - I have been testing an internal SATA RDX drive, made by Quantum, in an IBM x-series 226 server with dual 3.0 Ghz CPU's, 3 GB of RAM, and dual 73 GB SCSI drives configured as a simple RAID 1. The Operating System is Red Hat Enterprise Linux 5.3, Microlite BackupEDGE version 03.00.03 with the RDX cartridge configured as a file system partition. I modified the retention time to be only 3 days, as I was backing up to the same cartridge, and wanted to verify that the program would automatically delete the oldest archive to make room. When we have a cartridge for each workday, I will extend that back out to 2 weeks. - | |||||
| Kerio Connect Mailserver version 7.3 | 2011 11 | ||||
| - Kerio Connect Mailserver version 7.3 is scheduled for release in early November 2011 and adds important features, including a few that I suggested and lobbied for earlier. - | |||||
| Ucertify Review | 2011 09 | 2013/02/05 anonymous | |||
| - Whether certifications have any value is an entirely different question. I would suggest that you NOT bother with certification unless you are planning to apply for a specific job that requires it or if you are just starting out and have no experience to brag about. Many people like myself look upon certifications as having little real value - it's 'book knowledge' that doesn't necessarily translate into real skills. However, some employment opportunities may require these as an indication that you have at least basic knowledge. So let's just leave that argument for another day. The rest of this article assumes that certification has value for you. - | |||||
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| Death of the command line revisited | 2011 09 | 2011/09/10 TonyLawrence | |||
| - Five years ago I wrote a little blurb called Death of the command line. As it happened, that article was misunderstood by many who read it - I don't know if it was my fault or theirs, but somehow many readers ended up thinking I was either predicting the demise of CLI's (Command Line Interfaces) or hoping for that demise or both. Nothing could have been farther from the truth. I remain a big fan of CLI's and use them daily. And yet, just five years later and still at risk of angering yet another batch of folk who won't read carefully, I'm going to suggest that predicting the death of the CLI may not be such a bad bet after all. - | |||||
| Basic Home Networking, Part 3, File and Printer Sharing | 2011 08 | ||||
| - The point of a computer network is sharing. You might not be sharing much, perhaps even only the Internet connection. If that's the end of it, you don't need much more than part one of this series, which deals with the setup of a basic small network. - | |||||
| Basic Home Networking - Part 2, wireless setup | 2011 08 | ||||
| - Often all that needs to be done is to tell your computer that you want to connect to a wireless network. It's not always that easy, but it certainly can be. However, even if it is that easy for you, you might still want to read the rest of this in case you have problems later. You also might want to read it because being "too easy" to get connected could mean that you are running some security risk and need to address that issue. - | |||||
| Basic Home Networking - routers and switches | 2011 08 | 2011/08/16 BigDumbDinosaur | |||
| - Setting up a small office or home network used to be a fairly complicated task. Aside from the technical knowledge needed, there was expensive equipment to buy and specialized tools for wiring. That's all changed - the necessary equipment is cheap and readily available and it's all very easy to configu re. - | |||||
| A non-technical guide to understanding and fixing TCP/IP problems on a network | 2011 08 | 2011/08/14 BigDumbDinosaur | |||
| - The title is a bit incorrect in the .non-technical. claim, because we are dealing with a geekish subject here and I can't avoid being a little "techie". - | |||||
| Is Linux becoming insignificant? | 2011 08 | 2011/08/20 TonyLawrence | |||
| - How many Linux items have I read? Well, my Linux readers won't like this, because it's just 28. - | |||||
| Joe's computer turns 3 | 2011 07 | ||||
| - I'm really excited because soon I may get to run Linux! I have been hoping for that for years and had just about given up on the idea when they tried to install Windows 7 on my drive. - | |||||
| Using fail2ban with Kerio Connect mailserver | 2011 06 | 2011/07/14 Pat | |||
| - Fail2ban is fussy about dates in log files; Kerio's security log does not meet its standards - | |||||
| Moved to Linode.com | 2011 06 | 2011/06/20 Ralph | |||
| - I was very unhappy with my former hosting site. Recently I discovered Linode.com and have transferred this site to their XNE VPS servers. - | |||||
| He needs a SCO box | 2011 06 | ||||
| - Keeping an old SCO system running is sometimes necessary. Here is some help - | |||||
| TinyTERM ITX for Mac | 2011 05 | ||||
| - TinyTERM ITX for Mac OS X is somewhat disappointing - the emulation is fine, but it is a poor Mac app. - | |||||
| Linux colors ls ––color command | 2011 05 | 2012/03/03 anonymous | |||
| - Change default dircolors. Personally, I don't like colors in my shell. I think it would be fine as an option, but to have it as the default offends me and many other old Unix hands. - | |||||
| Why does fsck need a scratch file? | 2011 04 | 2011/06/02 KenPorter | |||
| - Although fsck hasn't needed scratch files for a while, large disks are reopening that need. - | |||||
| Finding Yesterday's Date | 2011 04 | 2012/09/11 TonyLawrence | |||
| - How to find yesterday's date on Linux, Mac and any other Unix. - | |||||
| Murder and mayhem - killing users processes | 2011 04 | 2011/10/28 BigDumbDinosaur | |||
| - how to kill all of a specific user's user processes without "killall" - or select a subset to kill - | |||||
| SCO/Linux Transition Guide | 2000 09 | ||||
| - This is not a porting guide; this is a transition guide: a guide to the major differences between SCO and Linux. - | |||||
| sco binaries linuxabi linux -->Re Run SCO Binaries onLinux | 1997-2004 | ||||
| - sco binaries linuxabi linux -->Re: Run SCO Binaries onLinux - | |||||
| Converting SCO to Linux - Another one down, two left | 2011 04 | 2011/04/05 BigDumbDinosaur | |||
| - Our efforts to get clients off OSR5 and on to Linux commenced in earnest in 2004, which was right after SCO started with their "Linux stole our code" lawsuits. - | |||||
| Slightly Scrambled - unsorting a file | 2011 04 | 2011/04/05 TonyLawrence | |||
| - Here is a typical way to approach the problem. It uses Perl's associative arrays and (somewhat ironically) uses - | |||||
| A SCO Openserver to Red Hat Linux Conversion | 2011 04 | 2011/04/02 TonyLawrence | |||
| - A detailed history of a SCO to Linux Conversion - including desktop users. - | |||||
| mount --bind | 2006 04 | 2012/01/03 Daniel | |||
| - Using Linux 'mount --bind' instead of symbolic links. If the thing you want to link to is a mounted file system, you can use the "--bind" option of mount to create an unbreakable link. - | |||||
| Linux and SCO Termcap Terminfo curses -->Re termconffiles and related matters | 1997-2004 | ||||
| - You might run a SCO binary application from a Linux console and get a pretty messed up result - it's probably termcap or terminfo on the SCO side having bad information about how a Linux console should be treated. - | |||||
| Smarter HTML Link Extractor | 2011 03 | 2011/07/20 TonyLawrence | |||
| - Checking links is not really hard; you can actually do it with just a few lines of Perl. - | |||||
| Using sudo | 2002 02 | 2013/03/05 lou | |||
| - I'm sure that there are more poorly written man pages, but "man sudoers" (which is how you find out about "sudo") is among my all time favorites for poor explanation. Let's clear that up. - | |||||
| Writing and Compiling C programs on Linux | 2004 12 | 2012/02/10 TonyLawrence | |||
| - Writing and compiling c programs on Linux, common errors for beginners. Most Linux and Unix programs are written in C. When you download source for a project, it will often be C or C++ source code. You don't necessarily need to know a darn thing about C or anything else to compile the source if you aren't changing it. It may be helpful for you to understand a bit if you are having problems with the compile, but even that isn't really necessary. - | |||||
| GPG/PGP Basics | 2001 11 | 2013/04/05 ClovisSangrail | |||
| - Using gpg for encryption, understanding the basic use of GPG for new users. Recently someone asked me for a GPG or PGP public key so that they could send some sensitive material to me by email. - | |||||
| The Gimp: Making Colors in a GIF Transparent | 2004 01 | ||||
| - Sometimes when working with an image you want to make a certain color transparent. When working with a gif file this would make a round circle look round on any color background. This is actually very simple once you do it once. Finding the information for this took me a while so I thought I would pass it on to anyone that was interested. - | |||||
| Lost root password (Linux) | 2003 12 | 2012/06/05 anonymous | |||
| - Let's try to fix your lost root password the easy way first. The first thing to try is to boot to single user mode. This MIGHT not work for you, because your system might be configured to still ask for a root password to get to single user mode. If that's the case, we'll use another trick that replaces init with /bin/bash. - | |||||
| Cron is not working | 2006 12 | 2012/08/17 TonyLawrence | |||
| - Let's just get this out of the way first: when someone says cron is not working, it almost always is, and they have just misunderstood something basic. - | |||||
| Recursive chown | 2006 03 | 2012/08/16 TonyLawrence | |||
| - 'chown -R' is smarter than you think. I had email this morning from someone using "chown" to fix up permissions on a directory. He had discovered "-R" in the man page but had run into a small problem... That succesfully changed the ownership of the "dot" files, but had an unexpected (to him) side effect: /usr was also changed. - | |||||
| Controlling core files (Linux) | 2005 03 | 2011/11/06 TonyLawrence | |||
| - Control Linux core files with ulimit and /proc templates. - | |||||
| Creating pretty graphs with RRDTOOL | 2009 08 | ||||
| - The open source rrdtool project helps you create a graphical view of any statistic collected at regular intervals. - | |||||
| Virtual PC for Mac OS X | 2003 07 | ||||
| - This is a review of an ancient Virtual PC product and is only left here for historical purposes. - | |||||
| Linux|Unix Logical Volume Manager (LVM) on Software RAID | 2002 11 | 2011/01/07 TonyLawrence | |||
| - Logical Volume Manager is now included with most Linux distributions. The RedHat 8.0 installer even allows you to create LVM volumes during initial install. LVM offers capabilities previously only found in expensive products like Veritas. If you plan on using LVM, I really recommend doing so on a RAID system, either hardware or software - | |||||
| Bash in-process regular expressions | 2005 09 | 2010/09/27 JonathanCross | |||
| - Bash acquired in-process regular expressions in version 3.0, but I never noticed, probably because most of the machines I'm using are Bash 2.05b. - | |||||
| Enabling Linux telnet | 2006 03 | 2012/09/05 TonyLawrence | |||
| - If you can't use ssh (as you should!), you'll need to find and install a telnet daemon for your Linux distro. - | |||||
| Monitoring file or directory changes | 2003 11 | 2013/02/01 anonymous | |||
| - Many modern systems provide a way to watch a directory for events - | |||||
| Apt-get for RedHat Linux | 2003 03 | 2011/11/08 TonyLawrence | |||
| - RedHat 7.3 and 8.0 do not have tools like Mandrakes urpmi for installing/updating rpms. After researching on Google groups for a similiar Redhat tool . APT seemed to be the best. I think its a tool from Debian linux. - | |||||
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| Mac Screen sharing is not just for Macs | 2008 01 | 2012/03/22 TonyLawrence | |||
| - Mac Screen Sharing can connect to any VNC host. That's Mac Screen Sharing connecting to a TightVNC server on my wife's Windows XP machine. - | |||||
| Finding large files | 2006 12 | 2010/10/02 wilson | |||
| - Where has the space gone? Although it is getting harder and harder to run out of disk space, some of us still manage to do it. - | |||||
| Tightvnc, Chicken of the VNC | 2003 10 | ||||
| - Reviews of TightVNC and Chicken of the VNC. VNC is "Virtual Network Computing" and is a crossplatform method of allowing remote access to desktops (Windows or Unix/Linux, Mac and others)). It is conceptually like using Terminal Services or PcAnywhere etc for Windows but is license free and of course capable of serving Linux/Unix machines also. - | |||||
| Numeric Unix Error Messages | 2001 12 | 2010/04/06 TonyLawrence | |||
| - It's an unfortunate fact that many programmers are lazy about error messages. Very often, all you get is a cryptic "Error 5", and you may be lucky to get that. - | |||||
| VMware Networks, Bridged vs. Nat vs. Host | 2008 12 | 2011/05/19 Firedancerx | |||
| - Understanding VMware networking options. By default, VMware works in "bridged" mode - you use the 192.168.1.4 card by attaching a virtual network device to it. - | |||||
| Dealing with Duplicate IP addresses | 2009 04 | 2011/11/13 TonyLawrence | |||
| - Duplicate IP's on a network is an interesting problem that has no completely satisfactory solution, especially when malicious intent is involved. Let's leave those intentional conditions for another day; here we'll look at what happens when an IP gets duped accidentally. - | |||||
| RedHat RPM Source Packages | 2001 06 | ||||
| - Ever wanted to rebuild a RedHat RPM from source? I had an issue where I wanted to include one of the new features offered by SAMBA that enables logging to utmp in RedHat 7.1 and RedHat 6.2. Since RedHats supplied binary RPMs did not include this support, I had two choices: one was to download the SAMBA source, and compile the feature in from there, and my other choice was to possibly use the RPM source that RedHat supplies with their RPMs. - | |||||
| Linux sucks, windows is better than linux | 1997-2004 | ||||
| - OK, we've all heard it: Linux is too hard, Linux sucks, Windows is easier than Linux, yadda, yadda. - | |||||
| Who locked that file? | 2007 11 | ||||
| - Determine what process has a file locked - I can't even imagine how many times I've heard someone complain about a locked file. - | |||||
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