How to enable dark mode in RStudio
Choose a dark editor theme in RStudio, make the surrounding interface match, and switch back if you prefer a light theme.
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Updated practical guides
Troubleshooting steps, examples and references. Each guide explains what was checked and where platform testing is still limited.
How to keep PowerShell open after a script finishes
Run a script in an existing terminal, or use -NoExit when launching PowerShell. Understand when a prompt or transcript helps.
Read article →How to start Ubuntu from PowerShell with WSL
List installed WSL distributions and launch Ubuntu explicitly from PowerShell, including when Ubuntu is not the default distribution.
Read article →Git Bash missing from the Windows right-click menu
Check Windows’ extended context menu and Git for Windows shell integration before changing settings or reinstalling.
Read article →Fix “not recognized as the name of a cmdlet” in PowerShell
Check spelling, command discovery, module availability and script paths before changing PowerShell execution policies.
Read article →Python runs in the terminal but shows no output
Distinguish a silent script from the interactive prompt, an uncalled function, waiting input and buffered output.
Read article →Fix “could not find part of the path” in PowerShell
Check the actual path, its parent folder and the working directory, using literal paths for filenames containing brackets.
Read article →How to check your Azure login in PowerShell
Inspect your Az context, check token acquisition without printing secrets, and distinguish Azure PowerShell from Azure CLI.
Read article →Does Bash have a goto command? Use functions and loops
Bash has no built-in goto statement. Replace labels with functions, loops, break, continue or return.
Read article →How to go back in Bash: cd .. versus cd -
Move to the parent folder, return to the previous directory, or use pushd and popd for a directory stack.
Read article →Set PowerShell execution policy for the current session
Inspect Windows execution policy and use an explicit scope when a trusted script requires a policy change.
Read article →Where are PowerShell scripts located?
PowerShell scripts can be saved anywhere. Find a project script, identify the running script and inspect profile paths.
Read article →How to exit Git Bash without losing your work
Save editor buffers, check repository status and running jobs, then exit. Closing a shell does not commit or stash files.
Read article →Use Python 3.9 for a legacy project without removing Python 3.10
Keep system Python intact and isolate legacy dependencies. Python 3.9 is end of life and should not be the default for new work.
Read article →Can Python use Greek letters in variable names?
Python supports many Unicode identifiers, including Greek letters, but its keywords and syntax are not translated.
Read article →Why can’t Python find my file?
Print the current working directory and resolved path, then decide whether the file belongs beside the script or in the working folder.
Read article →How to put an apostrophe in a Python string
Use double quotes around text containing an apostrophe, or escape a single quote with a backslash.
Read article →How to exit Python interactive mode
Leave the Python prompt with quit() or an end-of-file shortcut, and distinguish the interpreter from your shell.
Read article →Why is my CSS not being applied? A practical checklist
Check the stylesheet request, selector, declaration and cascade in that order. Use a minimal example to isolate the problem.
Read article →Create a Python dictionary of student names and grades
Store grades by name, update a value, handle missing keys and calculate an average without failing on an empty dictionary.
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