Linux, Ubuntu, Debian, Mint, CentOS Tutorials
Linux and Unix operating systems provide the chmod command in order to change access permission for the files and folders. The chmod command name comes from change mode . The read, write, execute permissions with the sticky bit feature can be changed by using the chmod command. The chmod command is created in 1971 with … Read more
The tcpdump command or tool is used to analyze network packets on Linux systems. It provides the ability to parse, filter and display network packets and protocols in different ways. The tcpdump is created in 1988 for BSD systems and ported most of the Unix, Linux operating systems and became very popular. The tcpdump is … Read more
Pi-Hole is a network-wide adblocking software that can be installed on Linux distributions like Ubuntu, RaspberryPi. Also, the Pi-Hole can be installed on Docker containers easily. The Pi-Hole is used as a DNS server and checks every DNS request and domain name if it is secure. If the requested domain name is not secure the … Read more
The zip compressions are one of the most popular compression formats and algorithms. Even its name has used the term as compression and generally called zipping or unzipping. The zip files can be extracted by unzipping them. Even there are different tools the unzip command is the most popular and regular way to unzip a … Read more
The wget command or tool is used to download and retrieve data from websites, FTP servers, etc. The wget is very popular in the open-source community as a download manager. The wget command can use different protocols to downloads files and data like HTTP, HTTPS, FTP, etc. The wget tool provides robustness, recursive download, non-interactiveness … Read more
The *.tar.gz is a very old and popular compression and file format used to store multiple files and directories in a single compressed file. The tar.gz file consists of two types of files where the first format is the tar format. The tar format is used to put multiple files and folders into a single … Read more
Zip is a compression algorithm and format used to package given files and folders to use less disk space. The zip files have generally the *.zip extension and different tools that can be used to create, add, remove or extract zip files. But the most prolific tool and command is the zip command in Linux … Read more
Linux provides the ip route command in order to manage the routing table. The routing table is used to set routes for different destination IP addresses. Even there is a default route in most of the cases which are used to sent IP packets to the other networks we may need to add new routes … Read more
The disk is an important resource for Ubuntu distributions and servers. Especially SSD disks are more expensive than other mechanical disks. So it is important to check free and used disk space regularly and take required actions to empty unnecessary data. Ubuntu provides different ways, commands to check free and used disk space. In this … Read more
Adding and removing user accounts is a daily task for a Linux system administrator. Ubuntu is one of the most popular distributions used in the Enterprise environment where the delete or removing a user account is a daily task too. Removing or deleting a user account in Ubuntu requires administrative privileges which are generally provided … Read more