Linux, Ubuntu, Debian, Mint, CentOS Tutorials
grep is a very powerful and useful tool used to search and match different terms inside files or directories. The grep is regularly used with a search term that is expected to match but in some cases, we may need to exclude the specified term or terms. In this tutorial, we examine how to exclude … Read more
The rmdir command is used to remove directories. Also, the rm command can be used to remove files and folders too. But the rmdir command should be used only for the empty directories. If the rmdir command is used for the non-empty directories the rmdir: failed to remove ‘nmap’: Directory not empty error is returned. … Read more
The pip3 is the package manager for Python3. The pip3 provides the ability to search, install, update and remove 3rd party Python packages which are not provided by default. The pip3 can be installed in different ways on Ubuntu distribution which is explained in this tutorial. Install pip3 The pip3 command can be installed by … Read more
Unix provides different commands in order to kill processes. Actually, Unix is the predecessor of the Linux distributions like Ubuntu, Debian, Mint, RHEL, CentOS, etc., and provides the same commands to kill processes. The Linux distributions are copied commands from Unix and also added some new commands to kill processes. List Processes For Unix, before … Read more
Processes are the main part of the Ubuntu operating system in order to accomplish different tasks. A typical Ubuntu system runs lots of processes in daily routine. In some cases, we may need to kill a process in Ubuntu. There may be different reasons to kill or stop the process in Ubuntu. In this tutorial, … Read more
Passwords are used to authenticate users or different entities in order to access some services, resources, or operating systems. As a secure and modern operating system, Linux provides passwords for a long time from its startup. Even though some Linux distributions provide passwordless login for a better and easy user experience it is not recommended … Read more
Bash script provides the array data structure in order to store multiple items in a single variable. Multiple strings can be stored inside an array which is also called as array of strings . In this tutorial, we examine how to define or create an array of strings by accessing and looping them in bash. … Read more
SSH protocol provides secure communication with remote systems in an easy way. When using the SSH protocol and tools to connect to the remote system there are different security checks. These checks may prevent or rejects the SSH connections. The ssh_exchange_identification connection closed by remote host error occurred when the remote system or SSH server … Read more
Linux, Unix, and MacOS operating systems provide the bash shell in order to provide a command-line environment and shell. The bash shell has different configurations which can be configured using the .bashrc and .bash_profile files. The .bash and .bash_profile files can be used to set different bash configurations like $PATH, history, alias, command prompt, etc. … Read more
Python is popular programming and scripting language which is used in different cases and applications. Python is cross-platform and can be used in different platforms, and operating systems. Python3 is the latest version and can be installed on Ubuntu easily. In this tutorial, we examine different methods to install Python3 on all Ubuntu distributions. Check … Read more