Error: Invalid command ‘SSLEngine’, perhaps misspelled or defined by a module not included in the server configuration

On some occasions apache server will just fail, and become crashed, failing to restart with an error message like # tail /var/log/httpd/error_log [Sun Dec 22 10:05:27.006998 2013] [core:emerg] [pid 15001:tid 140145945569216] (28)No space left on device: AH00023: Couldn’t create the fcgid-proctbl mutex [Sun Dec 22 10:05:38.000403 2013] [core:emerg] [pid 15018:tid 140368783902656] (28)No space left on…

In this article, we will explain swap space, and learn how to create swap space using a swap file in Linux: this is important in case we don’t have a swap partition created on the hard disk. Swap space/partition is space on a disk created for use by the operating system when memory has been…

This guide will show you how to extend or resize an ext2/3/4 and XFS File System without LVM at runtime. This could be a root partition configured with ext2/3/4 or XFS filesystem but without any LVM configured. Step 1: Check your current root disk capacity For this demonstration, I have a CentOS 7 VM with…

Home and navigation When you first log into your server, you will be in your home directory. For the root user, this is /root/. Linux folder structure Linux uses a nested folder structure to store different files. The top-level directory is considered the root directory, and is designated by /. Folders beneath the root level…

How to automatically clean up /tmp directory contents in Linux?   Every Linux system has a directory called /tmp which has mounted with separate file system. It has special filesystem called tmpfs. It’s a virtual filesystem and operating system will automatically mount /tmp mount point while system booting. If you want to mount /tmp directory separately as…