Tutorials on Linux, Programming & Technology

How to count in a for loop in Python

How to Count in a for Loop in Python?

To count in a “for” loop, the traditional “for” loop, along with the addition operator “+” and the “enumerate()” function, is used in Python.

How to Play DVD in Ubuntu 22.04

How to Play DVD in Ubuntu?

To enable the playing mode of DVD, your Ubuntu system must be equipped with a media player and the “libdvd-pkg” which contains all the required codecs.

How to List Cron Jobs in Linux

How to List Cron Jobs in Linux?

To list all the cronjobs, use the command “crontab -l”. To list specific cron jobs, use the command “ls -la /etc/cron.hourly/daily/weekly/monthly”.

How to Connect to a Docker Container

How to Connect to a Docker Container?

Docker provides the “docker attach” and “docker exec” commands to establish the connection with the running containers specifying the container name.

How to Check if Crontab is Working?

How to Check if Crontab is Working?

To check crontab services, “status” utility, “ps aux”, “pgrep”, and “tail” commands are used. It provides currently active/dead running processes in the system.

chattr Command in Linux Explained

chattr Command in Linux | Explained

In Linux, the “chattr” command is utilized to change the existing attributes of a file such as “i” for immutable, “a” append mode via “+”, “-” operators.

Understanding the etcpasswd File in Linux

Understanding the /etc/passwd File in Linux

The /etc/passwd file holds the information of “Username”, “Password”, “UID”, “GID”, “GECOS”, “Home directory”, and “Login shell” of the system and normal users.

Fix tar not found in archive

Fix: tar not found in archive

The error “tar not found in archive” is fixed by following the syntax correctly alongside the target directory name and its position in the syntax.

Fix: sudo apt-get command not found

Fix: sudo apt-get command not found

The error “sudo apt-get command not found” can be fixed by downloading the latest APT package manager to install, remove or update packages in the system.

Fix: no module named pkg_resources

Fix: no module named pkg_resources

The error “no module named pkg_resources” can be resolved by installing the python package via “sudo apt install python-pkg-resources”.

How to Rename Directories in Linux

How to Rename Directories in Linux?

To rename the directories in Linux, use the find command, mv command, or the GUI method. In this blog, all these methods are explained in detail.

Methods to Install Python on Mac

Methods to Install Python on Mac

In the Mac operating system, Python can be installed using the “Homebrew” package installer and the official “Python Installer”.

How to use Ubuntu online

How to Use Ubuntu online?

To use Ubuntu online, open the web browser and go to onworks.net and follow the instruction of the blog to learn to use Ubuntu online.

5 Best Windows Emulators in Linux

5 Best Windows Emulators in Linux

Emulators are used in Linux to run Windows and Windows-based applications. 5 best windows emulators and their installation guides are provided in this post.

KeyError 1 exception in Python

KeyError: 1 exception in Python

To resolve this “KeyError”, we need to check the existence of the key before accessing, set the key before accessing, or use the try-except block.

unlink Command in Linux Explained

unlink Command in Linux | Explained

In Linux, the “unlink” command removes the file and link after accessing the required directory. It is useful to remove unnecessary files from the system.

How to Save a File Using Nano

How to Save a File Using Nano?

The existing file can be saved by pressing the “Ctrl+S” key in Nano Editor. Also, the “Ctrl+O” key overwrites the file with a different name or file format.

How to Connect Wifi Ubuntu Server

How to Connect Wifi Ubuntu Server?

In Ubuntu, connect the WiFi network through the “nmtui” and “GUI” methods. Both methods require SSID and passwords of a particular internet connection.

How to grant root privileges in Linux

How to grant root privileges in Linux?

In Linux, the “sudo” command is utilized with “- s”, “su -” and “-i” utilities to grant the root privileges from a normal user after authentication.

Python OpenCV cv2 Resize Image

Python OpenCV cv2 Resize Image

The “cv2.resize()” function is used to upscale or downscale the image. The width/height of the image can be resized separately by providing the constant value.