[yz@bogon ~]$ ps ux | grep gdb
yz        8795  1.3  0.2 227860 29152 pts/1    T    19:00   0:00 gdb attach 8754
yz        8807  0.0  0.0 112728   992 pts/1    S+   19:00   0:00 grep --color=auto gdb
[yz@bogon ~]$ jobs
[1]+  Running               gdb attach 8754
[yz@bogon ~]$ fg %1
gdb attach 8754
(gdb)