100 bg [1]+ sleep 100 & $ ps PID TTY TIME CMD 13118 pts/7 00:00:00 bash 16758 pts/7 00:00:00 sleep 16761 pts/7 00:00:00 ps $ while ps 16758 ; do sleep 5; done; echo "done^G" PID TTY STAT TIME COMMAND 16758 pts/7 S 0:00 sleep 100 PID TTY STAT TIME COMMAND 16758 pts/7 S 0:00 sleep 100 [1]+ 終了 sleep 100 PID TTY STAT TIME COMMAND done