Fix: cannot open output file permission denied
The “cannot open output file permission denied” can be resolved by “accessing the Directory Permissions”.The permissions are changed using the “chmod” command.
Fix: bash: syntax error near unexpected token `(‘
To fix “bash: syntax error near unexpected token ‘(’” error while bash scripting, use the backlash or the single/double quotes.
cut command in Linux | Explained
The cut command extracts specific fields or columns from a file or standard input in Linux. Read this article for information regarding this command.
Bash Loops | Explained
Bash loops are an essential part of any programming language as they will automate repetitive tasks to save time and minimize the lines of code.
bash if else With Examples
The bash if-else statement will let you decide certain aspects of code that you want to execute and others that you want to ignore.
Install the Latest PHP on Ubuntu 22.04 LTS
Latest version of PHP can be installed using the “$ sudo apt install php8.2” and “$ sudo apt install php8.2-cli” commands.
How to Install MySQL on Ubuntu 22.04?
To install MySQL on Ubuntu 22.04, use the “sudo apt install mysql-server -y” command and configure using the “$ mysql_secure_installation” command.
How to Fix a Big /var/log/journal?
To fix the error /var/log/journal in Linux, reduce the size of the journal file using the vacuum-size, –vacuum-time, and –vacuum-files options with the command.
How to Move a File to Another Directory in Linux?
In Linux, to move a file to another directory, the “mv” command is used, or choose the “Move to…” option after selecting the file from GUI as discussed.
How to Find the Process ID of a Program and Kill it?
To find the process id, use the commands “pidof”, “pgrep”, “pstree”, or “ps aux”. And to kill it, use the “killall
Fix: Too Many Open Files Linux
To fix the “too many open files” error in Linux, increase the opened files limit for the current session or for permanent.
How to Insert Typewriter Font in Google Docs?
To insert the typewriter font in Google Docs, select the “Courier” font style, which is given in the list of built-in “Fonts”.
How to install Terraform on Ubuntu 22.04?
To install Terraform on Ubuntu, run the command “sudo apt install terraform -y” in a terminal after adding its key and repository.
How to install RabbitMQ in Ubuntu 22.04?
To install the RabbitMQ server in Ubuntu, open the terminal and download the Debian package of RabbitMQ, then install it using the dpkg manager.
How to Install IDLE Python IDE on Ubuntu 22.04?
IDLE for Python is a simple, easy-to-use program that allows users to write and run Python code. It is ideal for beginners due to its interactive features.
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.
ValueError: min() arg is an empty sequence in Python
To fix this “ValueError” in Python, we can use default parameters and None value as the default parameter or use the try-except block, etc.
TypeError: string indices must be integers in Python
To resolve this error, various solutions are used in Python, such as accessing string values using integers, using the correct syntax for string slicing, etc.
TypeError: cannot unpack non-iterable int object in Python
To resolve this “cannot unpack non-iterable int object” error, solutions such as using a tuple or list and checking value before unpacking is used in Python.
TypeError: ‘NoneType’ object is not iterable in Python
The “NoneType object is not iterable” error occurs when a user tries to iterate the “None” or tries to iterate on the function that returns the “None” value.
TypeError: ‘NoneType’ object is not callable in Python
The “NoneType object is not callable” error occurs when a user tries to call a “None” variable as a Function or uses the same name for a function and variable.
SyntaxError: invalid syntax in if statement (Python)
In Python, the “SyntaxError” in an if statement arises when the user forgets to add a colon, incorrect indentation, or uses a single sign while comparing.
SyntaxError: ‘break’ outside loop in Python
The “SyntaxError: break outside loop” occurs when a user tries to use the “break” statement outside the loop and within the “if” statement 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.
How to Count the Number of Keys in a Dictionary in Python?
The “len()” function, user-defined function, and “for” loop is used to count the number of keys in the Python dictionary.
AttributeError: ‘str’ object has no attribute ‘append’
To fix this error, various solutions are used, such as using the addition operator “+”, using the format() function, and calling append() function on the list.
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.
![[Sleep Command] How to Pause a Bash Script](https://itslinuxfoss.com/wp-content/uploads/2022/12/Linux-sleep-command-pause-a-bash-script-01.webp)
How to Pause a Bash Script | Linux Sleep Command
The sleep command adds the delay time in the bash script, which runs after specific time intervals such as seconds (s), minutes (m), hours (h), and days (d).
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 Increment and Decrement Variable in Bash?
In Linux, three different operators, +, ++, and += are used to increment, and -, –, and -= are utilized to decrement a variable using the bash script.
How to Create Bash Aliases?
The bash aliases are created by adding the alias into the ~/.bashrc file or creating a separate aliases file and adding its reference to the ~/.bashrc file.
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 Concatenate Strings in Bash?
To concatenate bash strings, you can use strings together ($Str1$Str2), use curly braces (${Str1}${Str2}), and use the += operator (Str1+=”$Str2”).
How to Compare Strings in Bash
Comparison operators like the equality (= or ==), the not equality (!=), an empty string (z), and a non-empty string (n) are used to compare strings in bash.
Bash wait Command | Explained
The wait command in the Linux bash scripts waits for the previous commands to complete execution for a specific PID, for the first PID only, and all the PIDs.
Bash read Command | Explained
The read command reads the standard input and executes the commands with arguments as a prompt, reads array values, and sets the characters & time limit.
Fix: activation of network connection failed on Linux
In Linux and its distribution, the “activation of network connection failed” can be resolved by “Activate the Network” & “Set the correct Date & Time” via GUI.
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.
Fix: segmentation fault (core dumped) Linux
The error “segmentation fault (core dumped)” is fixed by removing the “lock” files, killing the process via PID, removing cache, repairing the broken packages.
ValueError: list.remove(x): x not in list in Python
To resolve the “list.remove(x): x not in list” error, check the element value before removing it, or use the try-except block to handle the stated error.
NameError: function is not defined in Python
“function is not defined” error occurs in Python if the user tries to access the function before declaration or access the function without declaring it.
How to Print a Variable’s Name in Python?
To print variable’s names, the “globals()” function, “items()” function, and “Python Dictionary” method are used in Python.
Pushd and Popd Commands in Linux
The “pushd” command stores a directory path in the directory stack, while the “popd” command removes the top directory path from the same stack.
Linux head Command | Explained
In Linux, the head command displays the first ten lines from the file’s content. The output of the head command depends upon the various options described here.
How to Use nano Editor in Linux?
Linux provides the “nano” editor by default. If it is not already installed, use the “$ sudo apt install nano” command.
How to Install Netbeans on Ubuntu 22.04?
In ubuntu 22.04, Netbeans is an integrated development environment that can be installed using Debian, snap, and flatpak packages.
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.
dmesg Command in Linux | Explained
In Linux, the dmesg command is a utility to display the Kernel messages related to the Kernel operations, which can be used with different options.
~/.bash_profile | Explained
In Linux, “.bash_profile” is the hidden file created in the home directory. This file is used to customize the user configuration environment.
rename Command in Linux | Explained
In Linux, rename command is a utility that replaces any file name with your desired file name. For this command, there are various options available.
SyntaxError: non-default argument follows default argument
The “non-default argument follows default argument” error arises when a positional/non-default parameter in a function follows a default parameter of a function.
Python OpenCV cv2 | Find Contours in Image
In Python, the “cv2.findContours()” is used to find the contours of a given image, and “cv2.drawContours()” is used to draw the contour on the image.
Not all arguments converted during string formatting Python
The “not all arguments converted during string formatting” error occurs when users use incorrect formatting syntax or the % operator with strings and numbers.
LookupError: unknown encoding in Python
The “LookupError: unknown encoding” occurs in Python programs when a user tries to specify the unsupported encoding in a function.
How to Install RStudio and R on Ubuntu 22.04
To install “R” and RStudio, run the commands”sudo apt install r-base -y” and “sudo dpkg -i
How to Install OBS on Ubuntu 22.04?
Run the “sudo apt install obs-studio -y” command in the terminal. OBS can also be installed from the snap, flatpak and the GUI methods explained in this guide.
How to Install and Configure Samba on Ubuntu 22.04?
To install the Samba on Ubuntu run the command “sudo apt install samba -y”, and for configuration, open the file “sudo nano /etc/samba/smb.conf”.
Bash Case Statement | Explained
The Bash case statement checks the multiple input values against the set cases. It executes the correct statement and quits the case statement.
How to Center a Text in Google Docs?
Google Docs offers the “Center align” icon and margin and the “Ctrl+Shift+E” shortcut key to place the text at the center of the document.
Google Docs | Free Checklist Templates
In Google Docs, checklist templates can be made from the “Checklist” icon or key “Ctrl+shift+9”. Also, free built-in templates can be used from websites.
Google Docs | Free Business Card Templates
In Google Docs, business card templates can be created using the “Drawing” window and downloaded from the “Third-party” websites free of cost.
Google Docs | Free Agenda Templates
In Google Docs, free agenda templates are added using the “From Template gallery” option from the “File” tab or the “Third-party” source.
How to Make Address Labels in Google Docs?
Google Docs offers the “Add-ons” feature for making address labels. It is possible by installing the “Foxy Labels” extension.
Google Docs Sign-Up Sheet Template
The “Table” option is used to create the Google Docs Sign-up sheet template in Google Docs. The Sign up built-in template is also useful for this task.
How to Insert an Infographic Into Google Docs?
Google Docs offers the “Drawing” window for inserting an infographic in Google Docs. Moreover, the built-in templates can also be used to perform this task.
ValueError: max() arg is an empty sequence in Python
The “ValueError: max() arg is an empty sequence” occurs when a user tries to pass an empty sequence as an argument of the max() function.
TypeError: unhashable type: ‘dict’ (Python)
The “TypeError: unhashable type: dict” error occurs when a user tries to use the dictionary as a key for another dictionary in Python.
grep Command in Linux | Explained
In Linux, the grep command is utilized to highlight (shows the match) the specific word, character, or string after searching the entire content in a file.
How to Add People to Google Docs?
Google Docs provides the “Share” button to add people through email or URL. Then, you can choose options “Viewer,” “Editor,” or “Commenter” to assign a role.
How to Embed Documents in Google Docs?
To embed documents, open “Google Drive”, right-click on the file, and select the format “Google Docs” from the popup list of the “Open with” option.
