What does this BASH shell script snippet do?

Question

Can you explain the following code (assume the HOST contains a string):

HOST=${HOST//$'\n'/}

If the above line was declared inside a function, would the "HOST" variable be available to other functions in the same script?

+3

bash regex shell

ViniH 22 jul. 15 at 13:27

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1 answer

Eugeniu rosca · Accepted Answer · 2015-07-22T13:33:42+0000

As per the Substring Replacement subtitle from the ABS manual :

HOST=${HOST//$'\n'/}

removes all occurrences of the newline character $'\n'

in the variable HOST

.

If the above line was declared inside a function, would the variable be HOST

available to other functions in the same script?

Yes, assuming it was HOST

not declared using bash local

.