command block commands

to get a comand block do /give "username" command_block.

put @a, @p, @f, @r before a command for the command to count for all players, nearest player, furthest and random player.for exaple /tp @a -143 78 38.

/summon Giant ~2 ~ ~ will summon a Giant 2 blocks away from the command block.

/fill 1 1 1 10 10 10 dirt    will fill all  the the blocks between x1 y1 z1 and x10 y10 z10 with dirt.

/effect @a blindess 10 to give all players blindness for 10 secends.

/weather <clear,rain,thunder> <seconds>

/tp @r [r=10] ~ ~10 ~ will teleport the nearest player in a radius of 10 blocks up 10 blocks

Set difficulty commands
peaceful = /difficulty 0
easy        = /difficulty 1
normal    = /difficulty 2
hard        = /difficulty 3

Set worlds defalt gamemode
survival      = /defaltgamemode survival
creative      = /defaltgamemode creative
adventure  = /defaltgamemode adventure

Stop or start rain/snow
/toggledownfall

Set time
/time set <seconds>

Daylight Cycle
turn off/on daylight cycle = /gamerule doDaylightcycle <false/true>

Gamerules
turn on/off fire spread          /gamerule dofiretick <true/false>
turn on/off entity drops        /gamerule doEntityDrops <true/false>
turn on/off mob loot             /gamerule doMobLoot <true/false>
turn on/off mob spawning  /gamerule doMobSpawning <true/false>
turn on/off tile drops            /gamerule doTileDrops <true/false>

/spawnpoint

/xp <amount>

/playsound <sound> <player>

/effect <player> <effect> <seconds>

/enchant <player> <enchant> <level>