Very fortunately, there are utilities that can open, display, and enable you to change characters or binary bytes inside any kind of file. These are called binary editors or hexadecimal editors, and the best of them in my experience (at least for the Linux world) is the Bless Hex Editor. It was designed to operate […]
Archives for September 2022
How to Save Command history of Selected Users in Linux
A very powerful and cool command in Bash is history. Simply put, by default, Bash will store a history of all the commands you type. The value of the HISTSIZE variable determines the number of events preserved in the history list during a session. Although the default value for HISTSIZE is 500, you may want […]
systemctl: command not found
Linux distributions are moving away from their old System V-style startup processes to a newer mechanism, the systemd daemon, and its associated systemctl command-line tool. Services managed by systemd/systemctl require, at a minimum, a configuration file that defines startup and shutdown processes, a type definition that controls how those processes will be handled by the […]
nano: command not found
Vim is a powerful text editor and knowing how to use it is an important thing for any system administrator. Nevertheless, there are other text editors that are equally powerful and even easier to use. This is the case with nano, which is installed by default in Ubuntu and CentOS and can be used right […]
partprobe: command not found
The partprobe command is normally needed only in situations where the partition table has changed and the system needs to be informed of the changes. The most common example is when you use the fdisk command to change a partition on a device that currently has mounted filesystems. The fdisk command attempts to inform the […]
firewall-cmd: command not found
The purpose of Firewalld is to replace the need for iptables and improve security management by enabling configuration changes without stopping the current connections. Firewalld runs as a daemon that allows for rules to be added and changed instantly and it uses network zones to define a level of trust for any and all associated […]
sestatus: command not found
SELinux can either be in an enabled or a disabled state. In order to check in which state it is running, we can make use of the getenforce command. There are two modes in which SELinux runs: There are two modes in which SELinux runs: Enforcing: This is the enabled state where all rules are […]
jarsigner: command not found
jarsigner adds a digital signature to the specified jarfile, or, if the -verify option is specified, it verifies the digital signature or signatures already attached to the JAR file. The specified signer is a case-insensitive nickname or alias for the entity whose signature is to be used. The specified signer name is used to look […]
How to uninstall neovim from Ubuntu
Neovim can be used as a drop-in replacement for Vim. Neovim is a fork of Vim, that branched out into its own thing in 2014. Neovim aims to address a few core issues about Vim: Working with a 30-year-old code base while maintaining backward compatibility is hard. It’s very difficult to write certain kinds of […]
How to uninstall rhythmbox-plugins from Ubuntu
There are many different approaches to audio players under Linux. Some players focus on minimalism, others focus on features, and some aim to provide similar functionality to a media player on another platform. Rhythmbox falls into the latter category, as it was created to provide an iTunes-like interface for audio under Linux. To play those […]