linux前后台进程

命令集合

command &  				  # 未启动的command放入后台去运行
 
[root@linux0224 ~]#ping baidu.com > /tmp/ll.txt &
[1] 3263
 
 
 
 
 
 
jobs                # 查看后台进程列表
 
[root@linux0224 ~]#jobs
[1]+  Running                 ping baidu.com > /tmp/ll.txt &
 
 
 
 
 
 
ctrl + z        	  # 暂停进程
 
[root@linux0224 ~]#ping baidu.com
PING baidu.com (220.181.38.148) 56(84) bytes of data.
64 bytes from 220.181.38.148 (220.181.38.148): icmp_seq=1 ttl=49 time=7.01 ms
64 bytes from 220.181.38.148 (220.181.38.148): icmp_seq=2 ttl=49 time=7.32 ms
64 bytes from 220.181.38.148 (220.181.38.148): icmp_seq=3 ttl=49 time=7.29 ms
^Z
[1]+  Stopped                 ping baidu.com
 
 
 
 
 
bg                  # 程序放入后台运行，和 & 一样
 
[root@linux0224 ~]#bg 1
[1]+ ping baidu.com &
[rootlocalhost ~~22:32:46]#64 bytes from 220.181.38.148 (220.181.38.148): icmp_seq=4 ttl=49 time=6.70 ms
64 bytes from 220.181.38.148 (220.181.38.148): icmp_seq=5 ttl=49 time=7.20 ms
64 bytes from 220.181.38.148 (220.181.38.148): icmp_seq=6 ttl=49 time=7.04 ms
64 bytes from 220.181.38.148 (220.181.38.148): icmp_seq=7 ttl=49 time=6.95 ms
64 bytes from 220.181.38.148 (220.181.38.148): icmp_seq=8 ttl=49 time=7.05 
 
 
 
 
 
 
fg                  # 将后台任务放入前台执行
 
 
[root@linux0224 ~]#ping baidu.com > /tmp/ll.txt &
[1] 3241
[root@linux0224 ~]#fg 1
ping baidu.com > /tmp/ll.txt