SC2279 – ShellCheck Wiki

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$0 can't be assigned in Dash. This becomes a command name.

Problematic code:


Correct code:

$0 can not be changed in Dash.


You appear to be trying to assign a new value to $0 in Dash.

Dash does not support this. Write around it, or switch to Bash.


If you instead wanted to compare the value of $0, use a comparison like [ "$0" = "myname" ].

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