Using awk to add mount options in /etc/fstab
Here is a simple example of using awk to add mount options to /etc/fstab entries. In this example we are adding the ‘nofail’ option to all entries starting with UUID that don’t already have...
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Using sed to backslash forward slashes
I needed to extract the devices from the /etc/fstab so I could feed them into a sed replacement. Of course I needed to backslash the forward slashes in the device path before I could...
Converting CentOS 7 machine from EFI boot to BIOS boot with gpt partitioned disk
Recently ran into an issue where most of our CentOS 7 virtual machines are using EFI boot with gpt partitioned disks. Working with AWS this presented an issue as they required BIOS boot and...
How to list and set the timezone on CentOS linux
You can list timezones on the system with the following command: Once you identify the desired timezone … you can set the system timezone with the following command: Example: