The best tips for Linux distributions including Ubuntu and CentOS.
This article will show you how to kill (or end) multiple processes or instances of a running script with a single command. If you are like me, you have run into this situation many many times. You run the ps command to list all the currently running processes and you see that there are multiple … Read more
This article will show you how to change your monitor resolution in Ubuntu 9.10. Most of us are long-time Windows users and we are very used to the interface and how to do a simple task like this. But for Linux newbies, it can get frustrating to navigate all the menu options to find the … Read more
This article will show you are to disable UAC (User Access Controls) aka those pesky popup dialogs where you must enter your password in Ubuntu Linux! As many of you know, this feature was implemented in Windows Vista but went horribly wrong and is the reason it has been removed in Windows 7. Linux, which … Read more
This article will show you how to install/enable the SSHD service on the Linux operating system (Ubuntu in this case). By default, the Ubuntu 9.04 Desktop edition does not come with SSHD installed. This means that remote users are not able to connect to the box via SSH. Luckily, it is very easy to allow … Read more
This article will show you how to parse a decimal number (such as a software release number) into individual parts. For example, you can do this if you need to compare the the minor release number of two versions. There are numerous ways to accomplish the same thing using Linux and I will show you … Read more
This article will introduce you to the diff command on Linux which is used to compare two files and display the “differences” between the two. I will also provide you with a Bash shell script to compare two files and simply output if they are the same or not. Lets begin with the basic usage … Read more
This article will explain how to generate a MD5 Checksum on a file or list of files and also how to validate a file against a known MD5 Checksum. What is a MD5 Checksum? The MD5 checksum is a widely used cryptographic hash function that produces a 128-bit (16-byte) hash value. It’s commonly used to … Read more
This article will show you how to open/uncompress/unarchive a .tar.bz2 file in Linux. First a little background… bz2 or BZIP2, is a more efficient compression format than ZIP, however it takes longer to comrpess the file. Another difference is that a BZIP2 can only be used to compress a single file, not a directory of … Read more
This article will show you how to install a FTP server (vsftpd) on Linux in under 30 seconds. Installing a FTP Server on Linux yum -y install vsftpd After the installation is complete, you must start the FTP server by running the command: service start vsftpd Thats all there is to it! A couple things … Read more
This article will show you how to append to a file in Bash Linux, such as a string. All of the following examples should work on all major Linux distributions like Ubuntu, CentOS, RHEL, Arch, and Fedora. One of the most essential skills for users and system administrators alike is the ability to manage and … Read more
This guide will take you through the basics of RPM and show you how to install it on different Linux server distributions: Ubuntu, CentOS, Fedora, and Red Hat Enterprise Linux (RHEL). In the world of Linux, mastering the art of installing, upgrading, and removing software packages is crucial. These tasks are generally handled by what’s … Read more
This article will show you to how to list of all installed RPM packages on Linux distributions like Ubuntu, CentOS, RHEL, and Fedora. We’ll show you how to solve this using the rpm and dpkg commands. RPM (Red Hat Package Manager) is used by distributions such as CentOS, RHEL, and Fedora for package management. Ubuntu, … Read more
This article will show you how to use the tail command to automatically view data that is appended to a file. This is particularly useful when you want to view the progress of some process from a log file. For example, if you want to see when the Apache server has finished loading, instead of … Read more
This article will show you how to create and delete symbolic links on a Linux system such as Ubuntu, Red Hat, and other Linux distributions. A symbolic link is basically a file that points to another file. Note that there is only 1 copy of the actual file on the hard disk, thus saving valuable … Read more
This article will show you how to find the amount of RAM memory on a Linux machine. To find this information you will need to login to the Linux command-line shell and and enter the following command at the $ (or #) prompt: $ cat /proc/meminfo Sample Output MemTotal: 1031960 kB MemFree: 391172 kB Buffers: … Read more
In today’s rapidly evolving digital landscape, understanding the performance capabilities of your Linux system is more vital than ever. Whether you’re a software developer testing an application, a sysadmin maintaining servers, or an everyday user simply looking to optimize your system performance, knowing your CPU speed and model under Linux is a key piece of … Read more
We’ll show you how to archive and extract files in Linux using the tar command. The tar command, short for ‘tape archive,’ is a critical skill in mastering the Linux environment. This article offers an in-depth guide on how to use tar to archive and extract files in three major Linux distributions: Ubuntu, CentOS, and … Read more
Determining the number of files in a Linux directory or folder is a helpful task that every Linux user or system administrator should know. Whether it’s for organizing your workspace, auditing system resources, or performing essential system maintenance, understanding how to find the number of files can be beneficial. This guide will take you through … Read more
This article will explain how to change the file extension for all files in a directory in Linux using a simple bash shell command. While you are on a learning path, be sure to checkout other useful Linux articles such as Insert/Add String to Beginning of a File and Linux – How to find the number … Read more
Running a script or application at Linux startup can be a major time-saver for system administrators and users who need certain tasks to execute automatically upon booting up their systems. Whether you are looking to perform routine maintenance tasks, start applications, or automate complex processes, understanding how to run a script at startup in Linux … Read more
This article will explain how to mount an ISO image quickly and easily on Linux without downloading any additional software. If you are on a Windows operating system, check out the article: How to mount an ISO on Windows XP and Windows Vista. ISO image files are often used in the distribution of software or … Read more
In this blog post, we’ll walk you through five command-line examples that can help you pinpoint the largest files in your Linux system. When it comes to Linux system administration, monitoring disk usage is a critical task. But how do we find the largest files eating up valuable disk space? It’s easier than you might … Read more