列出当前工作

 placeholderCopy$ tail -f /var/log/syslog > log.txt
[1]+  Stopped                 tail -f /var/log/syslog > log.txt

$ sleep 10 &

$ jobs
[1]+  Stopped                 tail -f /var/log/syslog > log.txt
[2]-  Running                 sleep 10 &