What is difference between running the script as ./script.sh and . ./script.sh [duplicate]

Question

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Difference between launching a script with ./script.sh and . ./script.sh

What is difference between running the script as ./script.sh and . ./script.sh

Answer 1

The sourced in (. ./script.sh) script runs in the same shell. Meaning that if it issues exit, your shell exits, if it sets environment variable, your shell is affected, etc. Normally, you want to run scripts in isolated subprocess (./script.sh).