How many times have you run a command and then thought, ooo crap i now need to leave work, i really should have nohupped it or run it in screen session well welcome to.
disown \[-ar\] \[-h\] [jobspec ...] Without options, each jobspec is removed from the table of active jobs. If the -h option is given, each jobspec is not removed from the table, but is marked so that SIGHUP is not sent to the job if the shell receives a SIGHUP. If no jobspec is present, and neither the -a nor the -r option is supplied, the current job is used. If no jobspec is supplied, the -a option means to remove or mark all jobs; the -r option without a jobspec argument restricts operation to running jobs. The return value is 0 unless a jobspec does not specify a valid job.
Had to write that on my blog now otherwise ill forget about it.