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This article covers an overview of conditional statements in bash scripts. Bash expression is the combination of operators, features, or values used to form a bash conditional statement. Conditional expression could be binary or unary expression which involves numeric, string or any commands whose return status is zero when success.

Bash if conditionals can have different forms. The most basic if statement takes the following form:

if TEST-COMMAND
then
  STATEMENTS
fi



This tutorial will guide you on how to write a simple shell script and run a script in Linux operating system with help of chmod and other commands.




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