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I know how to execute remote Bash scripts like this:
curl http://example.com/script.sh | bash or
bash < <( curl http://example.com/script.sh ) which give the same result.
But what if I need to pass arguments to the bash script? It's possible when the script is saved locally:
./script.sh argument1 argument2 I tried several possibilities like this one, without success:
bash < <( curl http://example.com/script.sh ) argument1 argument2 
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Arguments can be passed to the script when it is executed, by writing them as a space-delimited list following the script file name. Inside the script, the $1 variable references the first argument in the command line, $2 the second argument and so forth. The variable $0 references to the current script.
Positional Parameters. Arguments passed to a script are processed in the same order in which they're sent. The indexing of the arguments starts at one, and the first argument can be accessed inside the script using $1. Similarly, the second argument can be accessed using $2, and so on.
Let us say you want to pass shell variable $name in the data option -d of cURL command. There are two ways to do this. First is to put the whole argument in double quotes so that it is expandable but in this case, we need to escape the double quotes by adding backslash before them.
To improve on jinowolski's answer a bit, you should use:
curl http://example.com/script.sh | bash -s -- arg1 arg2 Notice the two dashes (--) which are telling bash to not process anything following it as arguments to bash.
This way it will work with any kind of arguments, e.g.:
curl -L http://bootstrap.saltstack.org | bash -s -- -M -N stable This will of course work with any kind of input via stdin, not just curl, so you can confirm that it works with simple BASH script input via echo:
echo 'i=1; for a in $@; do echo "$i = $a"; i=$((i+1)); done' | \ bash -s -- -a1 -a2 -a3 --long some_text Will give you the output
1 = -a1 2 = -a2 3 = -a3 4 = --long 5 = some_text If you love us? You can donate to us via Paypal or buy me a coffee so we can maintain and grow! Thank you!
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