描述:用于显示指定文件末尾内容,不指定文件时,做为输入信息进行处理。经常使用查看日志文件。日志
用法:tail [option] filecode
经常使用参数:进程
-f 循环读取io
-c<数目> 显示的字节数test
-n<行数> 显示行数file
--pid=PID 与-f合用,表示在进程ID,PID死掉以后结束. 循环
-s, --sleep-interval=S 与-f合用,表示在每次反复的间隔休眠S秒 im
示例:1显示文件末尾内容文件
[root@localhost test]# tail -n 5 log2014.log 2014-09 2014-10 2014-11 2014-12
2.循环查看文件内容ping
[root@localhost ~]# ping 192.168.120.204 > test.log & [1] 11891[root@localhost ~]# tail -f test.log PING 192.168.120.204 (192.168.120.204) 56(84) bytes of data. 64 bytes from 192.168.120.204: icmp_seq=1 ttl=64 time=0.038 ms 64 bytes from 192.168.120.204: icmp_seq=2 ttl=64 time=0.036 ms 64 bytes from 192.168.120.204: icmp_seq=3 ttl=64 time=0.033 ms 64 bytes from 192.168.120.204: icmp_seq=4 ttl=64 time=0.027 ms 64 bytes from 192.168.120.204: icmp_seq=5 ttl=64 time=0.032 ms 64 bytes from 192.168.120.204: icmp_seq=6 ttl=64 time=0.026 ms 64 bytes from 192.168.120.204: icmp_seq=7 ttl=64 time=0.030 ms 64 bytes from 192.168.120.204: icmp_seq=8 ttl=64 time=0.029 ms 64 bytes from 192.168.120.204: icmp_seq=9 ttl=64 time=0.044 ms 64 bytes from 192.168.120.204: icmp_seq=10 ttl=64 time=0.033 ms 64 bytes from 192.168.120.204: icmp_seq=11 ttl=64 time=0.027 ms
3.从第5行开始查看
[root@localhost test]# tail -n +5 log2014.log 2014-05 2014-06 2014-07 2014-08 2014-09 2014-10 2014-11 2014-12