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# Redis PERSIST Command [!(#) Redis Keys](#) The Redis PERSIST command is used to remove the expiration time of a given key, making the key never expire. ### Syntax The basic syntax of redis PERSIST command is as follows: redis 127.0.0.1:6379> PERSIST KEY_NAME ### Available Version >= 2.2.0 ### Return Value Returns 1 when the expiration time is successfully removed. Returns 0 if the key doesn't exist or has no expiration time set. ### Example redis> SET mykey "Hello" OK redis> EXPIRE mykey 10 # Set TTL for key(integer) 1 redis> TTL mykey (integer) 10 redis> PERSIST mykey # Remove key's TTL(integer) 1 redis> TTL mykey (integer) -1 [!(#) Redis Keys](#)