World control¶

Game modes, time & weather, gamerules, building, and entities.

Game mode & difficulty¶

Command	Effect
`gamemode creative`	also: `survival`, `adventure`, `spectator`
`gamemode survival Alice`	for another player
`defaultgamemode survival`	for new players
`difficulty hard`	`peaceful` `easy` `normal` `hard`

Time & weather¶

Command	Effect
`time set day`	also: `noon`, `night`, `midnight`
`time set 1000`	ticks (24000 = full day)
`time add 1000`	advance time
`time query time`	current clock ticks
`time pause` / `time resume`	freeze / unfreeze the clock (26.1+)
`weather clear`	also: `rain`, `thunder`
`weather rain 600`	duration in seconds

Pre-26 versions

Before 26.1 the query form was time query daytime, and time pause/resume didn't exist (freeze with gamerule doDaylightCycle false instead).

Useful gamerules¶

Command	Effect
`gamerule keep_inventory true`	no item loss on death
`gamerule mob_griefing false`	no creeper/enderman damage
`gamerule advance_time false`	freeze time
`gamerule advance_weather false`	freeze weather
`gamerule spawn_mobs false`	no hostile spawns
`gamerule players_sleeping_percentage 1`	one sleeper skips night
`gamerule random_tick_speed 3`	crop growth speed (default 3)

Run gamerule <name> with no value to query the current setting — help gamerule lists all 62 (the reply overflows mcrcon's packet limit; use nmcrcon or the server console for it).

Pre-26 versions

Gamerules were camelCase before 26.1: keepInventory, mobGriefing, doDaylightCycle, doWeatherCycle, doMobSpawning (now spawn_mobs), playersSleepingPercentage, randomTickSpeed, spawnRadius (now respawn_radius), doFireTick (now fire_spread_radius_around_player).

Building¶

Command	Effect
`setblock ~ ~ ~ stone`	place one block
`fill 0 64 0 10 70 10 glass`	fill region (max 32 768 blocks)
`fill 0 64 0 10 70 10 air`	clear a region

fill 0 64 0 10 70 10 stone replace dirt   # replace only dirt
clone 0 64 0 10 70 10 50 64 50            # copy region to new corner

The two corner coordinates of fill/clone are inclusive; clone's third coordinate is the lowest-X/Y/Z corner of the destination.

Entities & world¶

Command	Effect
`summon zombie ~ ~ ~`	spawn an entity
`summon lightning_bolt`	smite current spot
`kill @e[type=item]`	clear dropped items (lag)
`kill @e[type=zombie,distance=..20]`	nearby zombies
`locate structure village_plains`	coords of nearest (or any village: `#minecraft:village`)
`locate biome cherry_grove`	nearest biome
`seed`	show world seed

kill @e kills everything

Including players, item frames, and armor stands. Always filter by type= (or at least type=!player).

locate over RCON searches the overworld

RCON has no position or dimension. For nether/end structures, wrap it: execute in minecraft:the_nether run locate structure fortress.