While they aren’t always installed by default, the programs dump and restore are great tools for backing up and restoring ext4 filesystems. They are flexible and easy to use. dump/restore features: Support for full, differential, and incremental backups Can read from and write to standard input and standard ouput When writing to removable media, it… Read More »
The Linux find program is very powerful. It has a small learning curve, but a little time spent learning find now will save you a lot of time later. The Linux find command isn’t actually part of Linux. It is a program that is part of the GNU findutils project. It can be installed on… Read More »
You may want a version of Nginx that is newer than available in the repositories. As of today (2019 May 1), the latest version is 1.16.0. The Nginx developers maintain a apt repository with the latest version. I recommend using the repository because it will be easier to keep Nginx up to date. The Nginx… Read More »
You may want a version of Nginx that is newer than available in the repositories. As of today (2019 April 30), the latest version is 1.16.0. The Nginx developers maintain a yum repository with the latest version. I recommend using the repository because it will be easier to keep Nginx up to date. The Nginx… Read More »
The Debian Stretch repositories provide HAProxy version 1.7. You may want or need features in newer versions. Fortunately, installing HAProxy 1.9.7 from source is relatively straightforward. The steps to do so are: Install required packages Download the HAProxy source code Compile and install HAProxy Create an unprivileged service account Create a SystemD unit file Create… Read More »
The CentOS 7 repositories provide HAProxy version 1.5. You may want or need features in newer versions. Fortunately, installing HAProxy 1.9.7 from source is relatively straightforward. The steps to do so are: Install required packages Download the Lua source code Download the HAProxy source code Compile and install Lua Compile and install HAProxy Create an… Read More »
I have been in the computing industry for almost 15 years. In this time, I have encountered enough anecdotes where I am comfortable with the claim: A lot of people don’t like their IT department. There is even a Forbes article about people hating IT. I work in my company’s IT department back office as… Read More »
Checking disk space in Linux can done with the command line progams df and du. df is used to show usage at the filesystem level, while du can be used to show how much space individual files and directories use. If you aren’t familiar with how Linux presents storage devices, you will probably want to… Read More »
Unlike Windows, Linux doesn’t use drive letters to distinguish storage devices. It uses a single hierarchy starting at /. Storage devices are associated with directories within this hierarchy through a process called mounting. I’ll cover mounting and mount points more later on. The term Linux filesystem hierarchy refers to this tree structure. The Root Directory… Read More »
The OpenLDAP referential integrity overlay is used to keep attributes that refer to the DNs of other entries consistent when changes occur. If you are trying to make groups more manageable, consider using the memberOf overlay. The referential integrity overlay will automatically modify or remove attributes if the entry they refer to is renamed or… Read More »