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Accepted
IgorAlves
Asked: 2018-01-07 08:35:23 +0800 CST

What is the equivalent __LINE__ (php) in bash ?

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Running Ubuntu16.04 I would like to display in the terminal the line number in a running bash script.

It would be something like this example if it was in php:

echo "Installing NGINX. Line: ".__LINE__

How could I translate it to bash?

bash

1 Answers

  1. Best Answer

    In bash you can use the variable $LINENO for this purpose:

    echo Installing NGINX. Line: $LINENO

    $LINENO holds the current line number, see man bash:

    LINENO
    Each time this parameter is referenced, the shell substitutes a decimal number representing the current sequential line number (starting with 1) within a script or function. When not in a script or func‐ tion, the value substituted is not guaranteed to be meaningful. If LINENO is unset, it loses its spe‐ cial properties, even if it is subsequently reset.

    Example

    #!/bin/bash
echo $LINENO; echo $LINENO

echo $LINENO

    When executed this script prints:

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