Group Permissions Look Good But Permission Denied

A situation existed where a user needed access to a CentOS 6 server to provide support for a specific application. This application is associated with a unique username to that application. For the sake of argument, an application xyz has a user xyz which automatically puts that user in a group of the same name, xyz. The additional user whom...

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drupal

Automated Scripted Install for Drupal on CentOS7/RHEL7 Linux

To get an instance of Drupal running on a fresh and minimal install of CentOS7/RHEL7 is the goal. Here is an automated scripted install for Drupal on CentOS7/RHEL7 Linux. It is not all inclusive. It doesn’t take into accounts a MariaDB password or MariaDB hardening. Just a quick script to get things running rather quickly, preferably on a development environment….

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drupal

Automated Scripted Install for Drupal on CentOS6/RHEL6 Linux

Every now and again, you get the urge to try something new. Drupal is the project for today. The goal is to create an automated script to install Drupal on a fresh and minimal install of CentOS 6. Here is an automated scripted install for Drupal and drush, a command line supplement, on CentOS6/RHEL6 Linux. The script is not all…

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wordpress-3.png

Automated Scripted Install of WordPress on CentOS7/RHEL7 Linux

Sometime ago, I wrote an automated script to install WordPress on a CentOS 5 install of Linux. Over the years, the repos and WordPress requirements changed as did CentOS upgrades through CentOS 6. The script was modified accordingly. The script had to be modified considerably for CentOS 7 which facilitates the need for a new article. Here is an automated...Read More »

Check Hard Drive Performance in Linux with hdparm

There are many tools to check the hard drive performance on Linux system. Here we are are concentrating on hdparm. A CentOS 6.7 Linux distribution is what is being used for this article. To install it, yum install -y hdparm. A sample run, hdparm -Tt /dev/sda The man pages (man hdparm) will offer many different configuration options, the two switches…

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Interesting Results when using cat with grep vs only grep

A typical situation is one where there is a directory that contains many files. Maybe 100s of files or more. Searching through however many files for a specific string can get annoying, however, here are a couple of ways to do just that. Note that there are many more, but this really isn’t the point of this article. A use…

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Install htop as a top Alternative

htop, an interactive process viewer for Linux. It is a text-mode application (for console or X terminals). It is a powerful alternative to using the top command. Here is a little script to install htop, which can easily be applied to any number of other simple installs too. After creating the script and making it an executable, run the script…

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Sorting Through Results of Revolving IPs from nslookup Results

If you are using something like imap.mail.yahoo.com or outlook.office365.com and would like to add a firewall rule to open the appropriate IPs to access could be quite a challenge. These IPs seem to change often. Here are a couple of command lines that may help sort through this mess. Typically, a simple command would be executed with results. Since there…

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