linux查看日志技巧

1.查看匹配某字符的日志

查看包含mcc login的日志

grep "mcc login" test.log

2.查看指定时间段内的日志

sed -n '/2017-02-23 10:00:00/,/2017-02-23 10:06:23/p' test.log
sed -n '/2017-02-23 10:00:/,/2017-02-23 10:06:/p' test.log

这个需要注意的地方是10:00:00或者10:00必须出现过.
如果没有任何日志出现.请先查看是否存在

grep "2017-02-23 10:00" test.log

3.查看日志中特定字符匹配数目

grep "abcd" test.log | wc -l


4.查找匹配特定字符的日志前后几行

1.查看日志出现在第几行

grep 'category":"unknown' sms.mdata -n

280:{"metric":"sms.total","tags":{"service.version":"1","category":"unknown","service.name":"sms_server","extend":"value","bizType":"unknown","provider":"tencent","appKey":"unknown"},"t
agsOnFly":{},"metricType":"Counter","value":1,"timestamp":1502296094399}  

2.查看前后日志

sed -n '275, 285p' sms.mdata

你可能感兴趣的:(小技巧,linux)