However, withdrawal from caffeine is seldom dangerous, though it can make one uncomfortable for a few days. The most frequent symptom associated with this withdrawal is a moderate to severe headache. This can occur between 12 and 24 hours after last intake of caffeine.
Okay, for step one you need to get the command blocks in your inventory. Make sure you have cheats ON and say /give (player name) command_block. After you get in in your inventory place 5 in a row.
OR. nohup /path/to/command-name arg1 arg2 &. Where, 1  command-name: is name of shell script or command name. 2  You can pass argument to command or a shell script. & : 3  nohup does not automatically put the command it runs in the background; you must do that explicitly, by ending the command line with an & symbol.