Web Reference: I'd like to add an argument to a command in bash only if a variable evaluates to a certain value. For example this works: if [ "${test}" == 1 ]; then ls -la -R. else ls -R . fi. The problem with this approach is that I have to duplicate ls -R both when test is 1 or if it's something else. Jan 16, 2026 · In this blog, we’ll demystify Bash conditionals, focus on checking string arguments, and provide a step-by-step guide to diagnosing and fixing the "Missing `]`" error. Bash if statements are very useful. In this section of our Bash Scripting Tutorial you will learn the ways you may use if statements in your Bash scripts to help automate tasks. If statements (and, closely related, case statements) allow us to make decisions in our Bash scripts. They allow us to decide whether or not to run a piece of code based up...
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