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# Redis Scripting Redis scripting uses the Lua interpreter to execute scripts. Redis version 2.6 supports the Lua environment natively. The commonly used command for executing scripts is **EVAL**. ### Syntax The basic syntax of the EVAL command is as follows: redis 127.0.0.1:6379> EVAL script numkeys key [key ...] arg [arg ...] ### Example The following example demonstrates how Redis scripting works: redis 127.0.0.1:6379> EVAL "return {KEYS,KEYS,ARGV,ARGV}" 2 key1 key2 first second 1) "key1"2) "key2"3) "first"4) "second" * * * ## Redis Scripting Commands The table below lists common Redis scripting commands: | No. | Command and Description | | --- | --- | | 1 | [EVAL script numkeys key [key ...] arg [arg ...]](#) Executes a Lua script. | | 2 | [EVALSHA sha1 numkeys key [key ...] arg [arg ...]](#) Executes a Lua script. | | 3 | [SCRIPT EXISTS script [script ...]](#) Checks whether the specified script has already been cached. | | 4 | (#) Removes all scripts from the script cache. | | 5 | (#) Kills the currently running Lua script. | | 6 | (#) Adds the script to the script cache without executing it immediately. |