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Evaluate several commands/arguments

      eval [arguments]

The arguments are concatenated together into a single command, which is then read and executed, and its exit status returned as the exit status of eval. If there are no arguments or only empty arguments, the return status is zero.

eval is a POSIX `special' builtin

Related commands:

case - Conditionally perform a command
expr - Evaluate expressions
for - Expand words, and execute commands
gawk - Find and Replace text within file(s)
test - Evaluate a conditional expression