$ cat 1.txt
./smp_ao_stafpotl_info.log.2020-07-23-AM:2020-07-23 09:36:22,655 898582491 [WebContainer : 1] ERROR com.group.bussvc.stafpotl.service.AppListTypeService - 20699052 saveESignature:780-000005-932
45101279@A156A0L62J8EDA8 MINGW64 /
$ awk 'BEGIN {FS="_"} {print $2}' 1.txt
ao
45101279@A156A0L62J8EDA8 MINGW64 /
$ awk -F '_' '{print $2}' 1.txt
ao
这两者是等同得
标签：A156A0L62J8EDA8,07,45101279,ao,AWK,linux,txt From： https://www.cnblogs.com/tigergaonotes/p/16648238.html