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  • Which approach would you recommend with shell? As ${!<varable name>} is not supported by shell. Commented Jan 16, 2023 at 12:53
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    @Freddy, eval echo "\$${var3}" works fine in the sh shell. Or, does your system have bash? Type in bash --version at the command-line. If it returns with a version number, you have bash. Add #!/usr/bin/env bash to the top of your bash script, like I do in eRCaGuy_hello_world/bash/hello_world_basic.sh, to force that script to use bash, and then use echo "${!var3}" instead. Commented Jan 16, 2023 at 16:28
  • I though maybe there is a way to avoid eval in sh shell but then eval echo "\$${var3}" it is. Commented Jan 18, 2023 at 22:08
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    @Freddy, if you post it as a question, put a link back here so I can follow the question too, but I don't think there's another way in sh, but I'm no expert on the matter. Commented Jan 18, 2023 at 22:14