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: Turn off secure boot Turn UEFI boot to both (meaning...Read More »

One way to compile xtables-addons without error

There seems to be some consistency on how to compile xtables-addons.  Notice I didn't suggest an agreement in the more popular approaches.  It seems that much of the approach is more of a copy and paste from one site to the next with some slight variation.  What generally isn't immediately obvious is the version of CentOS used or the version...Read More »

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...Read More »

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...Read More »

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-lineRead More »

Elasticsearch bootstrap checks failed [RESOLVED]

After installing Elasticsearch the application failed to start with a bootstrap error. The resolution was to modify three files. After logging off, logging back on, the user account successfully started Elasticsearch. Source http://www.cnblogs.com/woxpp/p/6061073.htmlRead More »

“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...Read More »

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...Read More »