SC2025 – ShellCheck Wiki

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Make sure all escape sequences are enclosed in \[..\] to prevent line wrapping issues.

Problematic code:

PS1='\e[36m\$ \e(B\e[m'

Correct code:

PS1='\[\e[36m\]\$ \[\e(B\e[m\]'


Bash is unable to determine exactly which parts of your prompt are text and which are terminal codes. You have to help it by wrapping invisible control codes in \[..\] (and ensuring that visible characters are not wrapped in \[..\]).

Note: ShellCheck offers this as a helpful hint and not a robust check. Don't rely on ShellCheck to verify that your prompt is correct.



ShellCheck is a static analysis tool for shell scripts. This page is part of its documentation.