Category: Tips and Tricks

Foxit Reader: Invert All Colors of Text

Foxit Reader is a fantastic alternative to Adobe Reader.  It is straightforward, not bloated, and offers functionality that I find useful.  Having used it as a replacement for several years from time to time there is something worth customizing.  The point of this article is one of those customizations, invert the text and background from black text and white background…

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Lenovo T460s won’t boot from USB

A USB thumb drive which boots successfully on any number of other computers doesn’t want to cooperate with the Lenovo Thinkpad T460s.  The T460s laptop simply refuses to boot to the USB drive. The resolution is remarkably simple. Boot the laptop to the BIOS and ensure the following two settings: On the next reboot, the USB drive successfully booted. Source

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One way to check if USB or DVD is bootable

You may have put a lot of time creating that perfect ISO or even downloading one for use as a bootable USB or DVD.  As with many cool projects, you let this one go and moved on to something else.  Then the need to revisit that perfect ISO has returned and all those web pages you had opened are closed…

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How to create a directory with permissions in Linux

The other day I was reading through some newsgroups on how to better automate a script.  Part of the script contained an interesting command that looked promising; however, could not get it work. This is the command. While it looks interesting, a quick execution of it created three directories, icinga:icinga, 0700, and mydirectory. This was not the desired effect. Looking…

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Disable Sleep mode using powercfg

After setting a Windows 7 computer sometime ago, I started to receive complaints that it kept going to sleep.  There is a GUI way of doing things, and fortunately, Microsoft has provided us with a command. Source(s) https://community.futuremark.com/forum/showthread.php?106691-windows-7-how-do-i-disable-SLEEP-mode-via-command-line

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“cannot set user id: Resource temporarily unavailable” [Resolved]

There are several servers that seemed to be setup identically with a local user account called user1 which may be found using getent passwd user1. However, for one reason or another, the account had become inaccessible and returned an error. Although a reboot of the CentOS 6 server resolved the issue, I wanted to know more. It is Linux after…

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CentOS server not found in Windows Network Neighborhood

There is a CentOS 7 file server that is accessible and works well; however, the Microsoft Windows Network Neighborhood does not display it. After some digging around, there is a simple fix for that. Edit the /etc/samba/smb.conf file and under the [global] section add/modify the following lines to look like this. Then restart the service. This integer value controls what…

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A Windows 10 Upgrade Experience

After the much advertised Microsoft deadline of July 29, 2016 for the FREE Windows 10 upgrade had passed, it turns out that there is an extension for Windows 10 free upgrade for customers who use assistive technologies. This upgrade path is still valid as of September 22, 2016, so I thought I would upgrade a Dell i3 laptop from Windows…

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Dell Latitude E6420 Supports 16GB RAM

Although it is well documented that the Dell Latitude E6420 supports up to 8GB of RAM.  Since memory prices have dropped over time, it was well worth the chance to upgrade the 8GB of RAM to 16GB of RAM.  This may not work for everyone, but, it certainly worked on one Dell Latitude E6420 laptop. Using crucial.com the memory scanner…

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Upgrade Windows 95 to Windows 95B the easy way

There was a time when Microsoft Windows 95 ruled the scene. That time has come to pass a long time ago. However, while going through some 20 year old notes, I came across this little gem to upgrade a system that has Microsoft DOS 6.22 with Microsoft Windows 95 to Microsoft Windows 95B and keep the settings and files in…

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Linux: the System Request Key

Everyday with Linux there seems to be something new to learn or a little tidbit that is worth remembering.  This time, the sysrq. Activates the System Request Key (aka. the Magic SysRq key), if thi value is set to anything other than zero (0), the default. sysrq The System Request Key allows immediate input to the kernel through simple key…

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WSUS Post Install Essentials

There are many articles that more than adequately detail a basic installation of the Windows Server Update Services (WSUS). This article assumes two things. The GPO has been configured and that this is a fresh installation of Windows Server 2012 with WSUS installed. No computers have connected yet. This article picks up at this point. Additional updates and configurations were…

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nginx, Apache 2 and subversion – 502 Bad Gateway error

All subversion checkouts, commits and other basic operations work as expected, but when attempting to copy, move or tag (copy) a (502 Bad Gateway) error presents itself. The error may be similar to the one presented below. Setup There is a machine running nginx on port 80 (and 443 SSL) that serves as a reverse proxy for among other things…

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Reset Root Password on CentOS7

CentOS7 offers a completely different approach to resetting a forgotten root password than the it’s earlier distro of CentOS6.x.  Here are multiple approaches that was tested on CentOS Linux release 7.2.1511 (Core) with success.  The last one being one that I combined from the many different approaches into fewer steps. Reset the Root password (version 1 Reboot the system to…

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Unable to update ca-certificates

Working on an early install of CentOS 6 and trying to update the system, the update failed. Even an attempt to update the ca-certificates failed. It turns out that the EPEL repository was the cause of this. To work past the offending EPEL repository and upgrade the ca-certificates, the following command works. Upon completion, a simple, yum update will work….

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MySQL

How to install a specific version of MySQL (or other app) via yum

To install an alternate version of, in this case, MySQL, rather than to accept the version that is available via the base and update yum repositories for CentOS, there are several ways of going about this.  You could install via tar.gz or download RPMs and yum install them directly; however, adding the official MySQL repository will work too.  It is…

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Use an RESL with SpamAssassin to Greatly Reduce Spam

Emailreg.org provides the Registered Email Send List (RESL) as a free lookup to anyone that would like to use it. It is also provided to those who have registered a domain here at EmailReg.org. The RESL is provided using a system that is similar to a DNS lookup. It is even more similar to a DNSRBL lookup. The RESL, however,…

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