Articles about command line | UserComp.com

Understanding Bash Prompt Abbreviations: An Overview

Resolve repetitive typing errors by creating and persisting Bash aliases in the .bashrc file for improved command-line efficiency.

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Cutting Short Video Clip Renders Subtitles Command Line (Windows)

Use ffmpeg to cut short video clips and burn subtitles directly from the Windows command line.

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How to Run a Bash Script in Zsh: A Step-by-Step Guide

Resolve Bash script execution errors in Zsh by explicitly invoking the bash interpreter to ensure correct syntax handling.

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Syntax Use in Command Line Prompt to Enter Cellular Phone Number for Remote Data Sync

Resolve rsync connection failures by replacing invalid phone numbers with the device's actual IP address obtained via USB tethering or Wi-Fi hotspot.

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Jumping Beginning Command in Windows Terminal: An Alternative Solution for Linux Users

Add custom keybindings in Windows Terminal settings.json to enable Ctrl+A and Ctrl+E for line navigation.

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Linux Find Command Using 'delete' and 'prune' Gives Error: A Guide for Tech Support

Resolve Linux find command errors when combining delete and prune by separating operations or using -exec rm -rf.

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Download File from Web Using Linux Command Line

Resolve wget HTTP 301 Moved Permanently errors by using the -L flag to follow redirects.

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How to Kill Windows Services in Cygwin

Resolve the issue of safely stopping Windows services from Cygwin by using net stop instead of kill to prevent data corruption and handle dependencies correctly.

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Discrepancy in Disk Usage Between du and ls Commands in Linux: Possible Explanations

Explains why du reports higher disk usage than ls due to block allocation, sparse files, and directory overhead.

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Granting Full Control Permissions to a Folder for a Local User without Changing Ownership (Command Line)

Grant full control permissions to a local user on a Windows folder using icacls without changing the directory ownership.

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Getting an Un-expanded Command Line: A Tech Support Guide

Retrieve the full unexpanded command line of a running Linux process by reading /proc/PID/cmdline and replacing null bytes with spaces.

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FFMPEG: Program does not quit when it returns an error (command line loops)

Resolve infinite loops in scripts by checking FFmpeg's exit code to stop execution on errors.

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7-Zip Command Line: Files Not Included When Compressing Subfolders

Resolve missing files in 7-Zip archives by adding the -r switch to enable recursive compression of subfolders.

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Using curl wttr.in to Display Only Current Temperature Value

Extract the current temperature integer from wttr.in using curl, grep, and sed for clean scripting output.

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Batch File Not Working with Space in File Name

Resolve batch file execution errors caused by spaces in filenames by properly enclosing file paths in double quotes.

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Error: rm cannot remove 'dir-name' - Directory not empty

Resolve the rm directory not empty error by using the recursive flag to delete non-empty folders and their contents.

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Sending Input Longer Than 8192 Characters to Commands: Options and Considerations

Bypass the Windows command prompt 8192 character limit for stdin by redirecting input from a file or using PowerShell pipelines.

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PHP File Execution Not Working on Freshly Installed Ubuntu Unity (23.10), Prints File Contents Instead

Resolve PHP files printing as text in Ubuntu by explicitly running them with the php command or starting a local server.

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How to Change Mac Terminal Background Color: A Comprehensive Guide

Customize Mac Terminal background color to improve readability and reduce eye strain during command-line sessions.

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Capturing Entire Process Tree in macOS: A macOS Command Line Tool

Capture and trace the entire process tree on macOS using native ps and dtruss commands for debugging and monitoring.

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What Does 'cp -ruv --update Remove Files Destination?' Mean?

Clarifies that cp -ruv --update skips up-to-date files and never deletes existing destination files, preventing accidental data loss during recursive copies.

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Windows 11: Using Command Line Path for Microsoft Office 365, Edge, Chrome, and Firefox

Resolve command line execution failures for Office 365, Edge, Chrome, and Firefox by using correct binary paths instead of shell shortcuts.

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Understanding Recursion in the Windows Attrib Command

Resolve the issue of Windows Attrib command only affecting the current directory by using the /S switch to recursively modify file attributes in subdirectories.

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How to Capture Time Parameter in ffmpeg Output on EndeavourOS

Enable ffmpeg -stats to capture real-time time parameters and redirect stderr for logging on EndeavourOS.

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How to Make ZSH Navigation More Like Bash

Resolve ZSH navigation discrepancies by adding bindkey -e to .zshrc to enable Emacs-style keybindings.

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Open Printing Preferences via Printer Properties Dialogs using cmd/pwsh

Open printer properties and printing preferences dialogs directly from the command line on Windows, Linux, and macOS.

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SSH Command: 6th Time's a Charm!

Resolve intermittent SSH connection failures by diagnosing timeout errors and optimizing client configurations for reliable access.

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Unzip STDOUT Filenames with Field Delimiters: A Tech Support Guide

Extract ZIP archive contents to stdout and format field delimiters using awk or sed without creating temporary files.

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FFmpeg-fconcat: Unable to Read File List from Command Line Pipe?

Resolve FFmpeg concat demuxer pipe errors by writing the file list to a temporary text file instead of piping it directly.

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Convert SVG to PNG using command line with width and height applied

Convert SVG to PNG with specific pixel dimensions using rsvg-convert for consistent, deterministic output in batch processing workflows.

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Understanding Openwall and John the Ripper: No John Command Parameters

Resolve John the Ripper usage summary by specifying hash format and input files via command line parameters.

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How to Fix {"dd"} Command Error when Creating a Bootable Ubuntu Installation Drive

Resolve dd command errors when creating bootable Ubuntu drives by fixing permission denied, device busy, and incorrect target device issues.

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Using Sudo Permissions with Unshare

Resolve permission errors when using sudo unshare by explicitly managing directory ownership with chown or mount options.

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Understanding the pipe and heredoc in Tech Support

Demonstrates using pipes and heredocs to automate log analysis, script configuration, and multi-line input in Linux technical support.

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Troubleshooting: MSYS2 - Directory not visible with ls-la command

Fixes the ls-la syntax error in MSYS2 by adding a space between the command and flags to correctly list directory contents.

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How to Save curl.exe Output Response Content_Type to a Separate File

Save curl HTTP response headers to a file using the -D flag while discarding the body with -o NUL or /dev/null.

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Failed Installation of Windows User Mode Driver Foundation v1.9 using Command Line

Resolves Windows User Mode Driver Foundation v1.9 command line installation failures caused by missing admin privileges, typos like pnputul, or unquoted paths with spaces.

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Finding the Correctly Executed Clang Version with Additional Arguments

Resolve discrepancies between reported and actual Clang versions by inspecting running processes with ps or auditing binaries with find to identify wrapper scripts and execution arguments.

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Why Would WSL Use the Wrong Distro from the Command Line on Occasion?

Resolve WSL launching the incorrect distribution by checking wsl --list --verbose and setting the correct default with wsl --set-default.

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Robocopy Command Report: Copied Files in Windows 10 - Summary

Interpret Robocopy summary statistics to verify file transfer integrity and troubleshoot errors in Windows 10.

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Running PowerShell Commands with Spaces using WSL: A Complicated Example

Resolve WSL Bash argument parsing errors when executing complex PowerShell commands containing spaces and special characters.

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Setting Global Variable with Bash Function Output Piped to Another Command

Assigns a Bash function's output to a global variable using command substitution to avoid subshell isolation issues caused by pipes.

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VLC for macOS Command Line Audio Delay

Resolve audio desynchronization in VLC for macOS by applying millisecond offsets via the --audio-delay command-line flag or vlcrc configuration.

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Unable to Remove User: Windows Command Line

Resolve Windows command line user deletion failures caused by active sessions, insufficient privileges, or lingering profile directories.

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Running External Commands with PowerShell Variables and Parameters

Resolve PowerShell parsing errors when passing variables and arrays to external commands like plink using the call operator.

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Running Multiple Complex Commands in Windows: Difference between & & &

Resolve script failures and performance issues by distinguishing between the unconditional single ampersand and conditional double ampersand operators in Windows CMD.

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Creating Desktop Shortcuts with Randomly Generated Number Filenames in Command Line Arguments

Automate desktop shortcut creation for ephemeral files by generating unique random number filenames and embedding them in command line arguments to prevent conflicts.

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Combining Search for Multiple Strings and Printing Rows After a Hit in Grep

Resolve the issue of searching for multiple strings and printing subsequent lines in grep on Windows 10.

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Controlling Output Format: date/tones in Command Line

Control Linux date command output format and handle negative signs for past dates using custom format strings and relative date options.

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Troubleshooting: Wrong Command Syntax Error while Moving 27,000 HTML Files in Windows 10

Resolve syntax errors when moving thousands of HTML files in Windows 10 by using the correct wildcard syntax with the move command.

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