Linux / UNIX: Find Out If File Exists With Conditional Expressions in a Bash Shell

Linux / UNIX: Find Out If File Exists With Conditional Expressions in a Bash Shell

With the help of BASH shell and IF command, it is possible to find out if a file exists or not on the filesystem. A conditional expression (also know as “evaluating expressions”) can be used by [[ compound command and the test ([) builtin commands to test file attributes and perform string and arithmetic comparisons.

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