Linux, Ubuntu, Debian, Mint, CentOS Tutorials
The Linux alias is used to create shortcuts or short forms for the commands. The alias makes a command with options easy to call without remembering all details. If you set an alias but this alias is not saved and cleared after reboots you should use the shell configuration file in order to save the … Read more
Linux is a command line-based operating system even though it provides GUI. The bash provides the environment to run commands. Linux provides lots of commands some of them are hard to remember or hard to type. The Linux bash provides the alias in order to shorten or rename commands. In this tutorial, we examine how … Read more
The Linux grep command is used to search and filter files and folders for the specified search term or regex pattern. One of the powerful features of the grep command is the ability to search multiple directories recursively. Even though it is a good feature in some cases we may need to exclude some directories … Read more
The *.tar is a popular archive format used to compress files in Linux and Unix operating systems. The tar format is used with different compression algorithms like gz, bz2, etc. The most important function of the tar format is the ability to store multiple files and directories as a single file where it can be … Read more
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
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
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