Escape dollar sign in string by shell script

Question

Suppose I have a script named dd.sh, and I run it like this

./dd.sh sample$name.mp4

So $1 is the string sample$name.mp4

Answer 1

As you know, a dollar sign marks a variable. You have to take it into account when you are typing it.

You can escape the dollar

./dd.sh "sample\$name.mp4"

or just type it with single quotes

./dd.sh 'sample$name.mp4'

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To check if there is a dollar sign in a variable, do

[[ $variable == *\$* ]] && echo 'I HAZ A DOLAR!!!' || echo 'MEH'