Sometimes, you think you should be receiving email from your linux host but the email messages never come. You have verified the email address, you have installed different email program variants, sendmail, mail, mutt, etc…, and yet the messages still…
Category: Linux
Configure ODBC for MySQL on CentOS
What’s the Difference – Use the Linux diff Command to Find Changes to Files
Using Bash Arrays with Examples
Arrays can be a useful tool when coding your bash scripts. The simplest way that I can define an array is to state that an array is a variable for a multi-instance dataset. For example, a variable is used when…
Detect and Block WordPress Brute Force Login Attacks
If you run a wordpress blog these days, you are likely to experience brute force attacks where nefarious individuals attempt to break in to your website by quickly a list of userids and passwords against your wp-login.php. Here’s how I…
Configure Sftp with User Jails
So, at your organization there is a high likelihood that you will need to create an FTP server to allow your customers and vendors to send you files. While having an ftp server is useful and all, the old standard…
Linux Process Monitoring: Things You Likely Didn’t Know About Top
What Personal Information Can You Get From Your Web Server?
Move Over Rsync, Unison is Better at Bi-Directional Syncing
I installed a new redundant WordPress instance on two different VPS servers the other day. One of my biggest worries with the new system was how would media images and files uploaded by the content editors on one of the…
Managing Bash Processes in the Foreground and Background
When you run a typical command from the shell, it will be run in the foreground. You have to wait for the process to complete before you can type another command. Some processes take time to complete and you can’t…
Adjust Process Priority with Nice and Renice
Find Which Linux Process is Using Your Files or Ports
Killing Linux Processes
It’s History: Bash Command Line History Explained
Add a Swap File to Your CentOS Linux System
Secure Your Sshd with Sshd_config Options
Install, Update, Remove, and Automate Yum Package Management
Helpful, Crazy and Somewhat Useless Linux Commands
Booting, Changing Runlevels and Configuring Linux System Services
Free Up Linux Memory Using Drop_Caches
Set Linux Time, Date, and Timezone
Grow an ext4 Filesystem on a VMWare Esxi Virtual Machine
Install and Test Oracle ODBC Drivers on CentOS
Install PostgreSQL ODBC Driver on Linux
10 Tcpdump Examples to Help You Watch Your IP Traffic
In a recent article here on UptimeMadeEasy about setting up NTP, I mentioned and showed an example on using tcpdump to watch the ntp traffic in and out of your server. I realized that the very short example was just…