在启动程序后，往往需要查看启动日志是否正常，有无报错，而有时日志量很大（刷屏），不易看清楚日志，这时就需要停下来，之前一直使用CRTL+C 直接退出，而后想看接下来的日志的话，日志已经刷好远了。。。。，今天发现一个将程序存放到后台的功能，需要时再调回前台查看就可以了，刚开始学linux时 知道有这功能，工作后一直没有用；今天用起来了，记录如下：
ping www.baidu.com 然后按 CRTL+Z,如下放到后台运行
[email protected]:~# ping www.baidu.com PING www.a.shifen.com (180.97.33.107) 56(84) bytes of data. 64 bytes from 180.97.33.107: icmp_seq=1 ttl=54 time=42.5 ms 64 bytes from 180.97.33.107: icmp_seq=2 ttl=54 time=42.4 ms ^Z [1]+ Stopped ping www.baidu.com
ping blog.51cto.com
[email protected]:~# ping blog.51cto.com PING 7c7rz4s17gs72353.alicloudlayer.com (116.211.167.193) 56(84) bytes of data. 64 bytes from 116.211.167.193: icmp_seq=1 ttl=46 time=27.5 ms 64 bytes from 116.211.167.193: icmp_seq=2 ttl=46 time=26.8 ms 64 bytes from 116.211.167.193: icmp_seq=3 ttl=46 time=27.9 ms ^Z [2]+ Stopped ping blog.51cto.com
ping docs.python.org
[email protected]:~# ping docs.python.org PING prod.python.map.fastlylb.net (151.101.16.223) 56(84) bytes of data. 64 bytes from 151.101.16.223: icmp_seq=1 ttl=44 time=513 ms 64 bytes from 151.101.16.223: icmp_seq=2 ttl=44 time=513 ms ^Z [3]+ Stopped ping docs.python.org
jobs 查看目前运行的后台程序
[email protected]:~# jobs [1] Stopped ping www.baidu.com [2]- Stopped ping blog.51cto.com [3]+ Stopped ping docs.python.org
fg 将最近后台运行程序(+)前台执行，这里为3 —ping docs.python.org
[email protected]:~# fg ping docs.python.org 64 bytes from 151.101.16.223: icmp_seq=4 ttl=44 time=491 ms 64 bytes from 151.101.16.223: icmp_seq=5 ttl=44 time=488 ms 64 bytes from 151.101.16.223: icmp_seq=7 ttl=44 time=489 ms 64 bytes from 151.101.16.223: icmp_seq=8 ttl=44 time=496 ms
可以看到基本上是从放入后台这个时间点运行到前台的
fg 1 将系列号为1的后台程序放入前台执行
[email protected]:~# fg 1 ping www.baidu.com 64 bytes from 180.97.33.107: icmp_seq=12 ttl=54 time=41.1 ms 64 bytes from 180.97.33.107: icmp_seq=13 ttl=54 time=42.1 ms 64 bytes from 180.97.33.107: icmp_seq=14 ttl=54 time=42.8 ms 64 bytes from 180.97.33.107: icmp_seq=15 ttl=54 time=41.2 ms
功能简单，但挺实用，记录一下！
时间： 2024-10-09 23:34:33